UConn PAN - User contributions [en]

Lab Journals

2015-05-05T20:45:59Z

Liana:

==Ann Marie's Lab Journal==

Old Google Doc. journal [https://docs.google.com/document/d/1RD-TAZcs7aZwPDGamwsVQ0dpsG6XR5rojtWvdvdy0kw/edit Google Document].

[[December 2012]]

[[January 2013]]

[[February 2013]]

[[AMCJuly 2013| July 2013]]

[[AMCAugust 2013 | August 2013]]

Current Google Document journal. [https://docs.google.com/document/d/1_SYNKQF45m0GddoRR3Suh7FWXeZ4xLQiLFJp_VuLtXs/edit?usp=sharing Here] is a informal to-do list that is updated daily.

==Jonathan Kulakofsky's Lab Journal / Research Progress==

[[JK January, 2013|January, 2013]]

[[JK February|February, 2013]]

[[JK March, 2013|March, 2013]]

[[JK April, 2013|April, 2013]]

[[JK July, 2013|July, 2013]]

[[JK August, 2013|August, 2013]]

[[JK Fall 2013|Fall 2013]]

[[JK Spring 2014|Spring 2014]]

==Liana Hotte's Lab Journal / Research Progress==

[[LH Spring 2013|Spring 2013]]

[[LH Summer 2013|Summer 2013]]

[[LH Fall 2013|Fall 2013]]

[[LH Spring 2014|Spring 2014]]

[[LH Summer 2014|Summer 2014]]

[[LH Fall 2014|Fall 2014 - Spring 2015]]

== Aaron Carta's Lab Journal ==
[https://docs.google.com/a/uconn.edu/document/d/141JI-gMW9XQ7NX_PIm2LqAhK2EnOqT4rVBr1JAcUboc Aaron Carta, Student Worker Log, Summer 2013].

[https://docs.google.com/document/d/1fX2373waAX1uTTvnxxCP5k_XB_Zql-WLkDAy0ej8Pag/edit?usp=sharing Aaron Carta, Undergraduate Research Log, Fall 2013]

[[Aaron Carta Undergraduate Research Progress, Fall 2013]]

[https://docs.google.com/document/d/1xL_BsvzqMoFQyBaC7R19q0QqdSoB0LVjq9cN3jCyDKQ/edit?usp=sharing Aaron Carta, Undergraduate Research Log, Summer 2014]

== John Bartolotta's Lab Journal / Research Progress==

[[JB Student Worker Log, Summer 2013]]

[https://docs.google.com/document/d/150Arri-9OrtY8MvuYq3-ornS6aNieYamTW23UPPa9nM JB Undergraduate Research Log]

[[JB Undergraduate Research Progress]]

== Ben Willis's Lab Journal==

[[BW June 2013|June 2013]]

[[BW July 2013|July 2013]]

[[BW August 2013|August 2013]]

[[BW December 2013|December 2013]]

[[BW January 2014|January 2014]]

[[BW May 2014|May 2014]]

[[BW June 2014|June 2014]]

[[BW July 2014|July 2014]]

[[BW August 2014|August 2014]]

[[BW December 2014|December 2014]]

[[BW January 2015|January 2015]]

== Kenny Brand's Lab Journal ==
[https://docs.google.com/document/d/1vHM4l8GG8cEvCr7R3C65I0zHEVuxbJ7GFmSGHOooJGM/ My Lab Journal!]

== Keegan Healy's Lab Journal ==
https://docs.google.com/document/d/19poQicod38LtHdncUqL1dv8rgpGY4VE67I_pbVNwbL8/edit

==Zane Grady's Lab Journal ==

==Aaron Khan's Lab Journal ==

==Andrew Sampino's Lab Journal ==

LH Fall 2014

2015-01-16T19:52:35Z

Liana: Created page with "My current work is being reported in my lab journal Google document, [https://docs.google.com/a/uconn.edu/document/d/10ymtoxoP3bMYuelhrSlSmGT-Nm95Xa4-ff9yjFh81xA/ here]"

My current work is being reported in my lab journal Google document, [https://docs.google.com/a/uconn.edu/document/d/10ymtoxoP3bMYuelhrSlSmGT-Nm95Xa4-ff9yjFh81xA/ here]

Lab Journals

2015-01-16T19:51:35Z

Liana: /* Liana Hotte's Lab Journal / Research Progress */

File:LH-CladdingEDX-1-2015-NewLG.png

2015-01-16T19:47:24Z

Liana:

File:LH-CladdingEDX-1-2015-OldLG.png

2015-01-16T19:47:14Z

Liana:

File:LH-CladdingEDX-1-2015-OldSciFi.png

2015-01-16T19:46:59Z

Liana:

Cladding Images

2015-01-16T19:46:52Z

Liana: /* EDX Confirmation */

=First Shipment=
<table><tr><td>[[image:fiber_009-4-2014.jpg|250px]]</td><td>[[image:fiber_016-4-2014.jpg|250px]]</td><td>[[image:fiber_020-4-2014.jpg|250px]]</td></tr></table>
=Second Shipment=
<table><tr><td>[[image:LH_VisInsp_2ndShip_01.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_02.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_03.jpg|250px]]</td>
<td>[[image:LH_VisInsp_2ndShip_04.jpg|250px]]</table>
=EDX Confirmation=
<table><td>[[image:LH-CladdingEDX-1-2015-OldSciFi.png|250px]]</td><td>[[image:LH-CladdingEDX-1-2015-OldLG.png|250px]]</td><td>[[image:LH-CladdingEDX-1-2015-NewLG.png|250px]]</table>

Cladding Images

2015-01-16T19:46:03Z

Liana: Created page with "=First Shipment= <table><tr><td>250px</td><td>250px</td><td>250px</td></tr></table..."

=First Shipment=
<table><tr><td>[[image:fiber_009-4-2014.jpg|250px]]</td><td>[[image:fiber_016-4-2014.jpg|250px]]</td><td>[[image:fiber_020-4-2014.jpg|250px]]</td></tr></table>
=Second Shipment=
<table><tr><td>[[image:LH_VisInsp_2ndShip_01.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_02.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_03.jpg|250px]]</td>
<td>[[image:LH_VisInsp_2ndShip_04.jpg|250px]]</table>
=EDX Confirmation=
<table><td>[[image:LH-CladdingEDX-1-2015-OldSciFi.jpg|250px]]</td><td>[[image:LH-CladdingEDX-1-2015-OldLG.jpg|250px]]</td><td>[[image:LH-CladdingEDX-1-2015-NewLG.jpg|250px]]</table>

Construction of the Full-Scale Tagger Microscope

2015-01-16T15:14:58Z

Liana: /* Current Work */

=Current Work=
We are currently in production of 12 additional fiber bundles to replace bundles which are currently installed in the microscope. We found that our light guide fibers were not double clad, but were only single clad. In August and September of 2014, we received a new order of BCF-98 and BCF-20 which we verified as multi-clad using [[Cladding Images|EDX techniques]]. In addition to having a second cladding layer, we are also attempting to maintain the optical qualities best by minimizing strain on fibers by removing some of the fiber procedures.

Current progress is being kept in the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1AZPVzbwDgBWl5UXUVSnz_8_0yO6rmNUTt_MeylHasTQ/ Fibers - 2015 Google Spreadsheet].

=Procedures for Tagger Microscope Construction=

[[Fiber Rough Cut Procedure]]

[[Straightening Light Guides Procedure]]<i> Discontinued Jan 2015</i>

[[Fiber Cleaning Procedure]] <i> Discontinued Summer 2014 </i>

[[End Milling Procedure]]

[[Fiber Polishing Procedure]]

[[Fiber Fusing Procedure]]

[[Fiber Bending Procedure]] <i> Discontinued Jan 2015 </i>

[[Fiber Painting Procedure]]<i> Discontinued May 2014 </i>

Fiber Gluing Procedure <i> Discontinued Spring 2014 </i>

[[Fiber Testing Procedure]]

=A List of Specifications/Manuals for Items in Lab 405=

This page has the documentation for the various procedures and pieces of equipment that are used in the bending tank, the splicing unit, and elsewhere in 405.
[[Documents for 405]]

=Miscellaneous Fiber Testing=

Below are the various tests that were conducted on the fibers to determine their durability when in contact with the alcohol that will be used to clean them. Also included are the strength tests that were conducted on the fibers that were fused with the old ferrules.

[[Alcohol Tests]]

[[Epoxy Tests]]

[[Strength Tests]]

[[Fiber Painting]]

[[Visual Inspection]]

===Ferrule Measurements===

In hopes of understanding the bulge in the spliced region of the fibers, the ferrules they are spliced in were photographed under a microscope and measured using a tracker program that allows for in-photo calibration and measurement. The ferrules were placed as perpendicular to the table as possible in order to get the most flat, head on shot of the ferrules. The error in the measurement of the angles was quite high. Moving the compass only a little bit (in the tracker program) lead to very different degrees read. Because of this I would estimate the angle to be off anywhere from +- 1-2 degrees. I would say that the lengths measured have an error on the order of +- .05-.1 mm

[[Measurement Photographs]]

[[New Ferrule Measurement Photographs]]

=Quality Control Procedures=
Fiber transmission measurements were carried out in Lab 402 using a flash ADC and a VME-based data acquisition system that was loaned to UConn by Jefferson Lab. Our contact at Jlab for this system is Alex Somov. Setup and operation of the CODA data acquisition platform is described [[Data Acquisition using CODA|here]].
*[[Description and Layout of the VME Data Acquisition Setup]]
*[[Procedure for Operation of CODA Run Control]]
*[[Creating/Editing mSQL Databases for CODA]]
*[http://halldweb1.jlab.org/wiki/index.php/Private:UConn_test_setup Alex Somov's instructions for running the CODA-based DAQ]
*[[media:Jlab_VME_discriminator_manual.pdf|VME discriminator manual]]
*[[media:FADC250UsersManual.pdf|VME FADC250 manual]]
*[[media:Jlab_F1_TDC_manual.pdf|VME F1TDC manual]]
*[http://zeus.phys.uconn.edu/halld/tagger/fp-microscope/fiberQA-2-2014/analyzer Analyzer] - software package that extracts pulse information from CODA data files and stores them in a root tree.

=Lab Journals / Research Progress=

The following page has the lab journals of Ann Marie and the undergraduate workers.
[[Lab Journals]]

=Past Goals and Production Documents=
If you want to see our previous construction goals you can access them below.

[https://docs.google.com/document/d/15OreBfdhb5mdpdXz6KMTVQt8ZWMU-4OV9i8Y6vp97Ms/edit?usp=sharing Construction Plan for the Tagger Microscope and Active Collimator]

[[Previous Construction Goals]]

[[List of CAD Drawings]]

[[LabView Program Explanation]] - This page details the work that has gone into the LabView program that was written to control the heaters and pumps for the bending tank in 405.

===Temperature Measurements===
This section describes the work that has gone into the construction of the thermistor for the bending tank in 405. It also has some materials devoted to describing the function and properties of a thermistor and the method used to build the one used here.

[[Thermistor Construction Journal]]

===Filling Tank / Filling PVC / Water Quality Information===

[[AMCImportant procedure to follow when filling the tank | Important procedure to follow when filling the tank]]

[[Water Tank Instructions and Diagrams]]

[[AMCPictures | Pictures]]

[[Water Quality Testing]]

Machine Shop Priorities are located [https://docs.google.com/document/d/1cuyRrSL8Mys-pou9SrYp-X7JCkTfnyDlzEaayu2f7Vg/edit?usp=sharing| here]

===Past Bundle Production Documents===
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dFVyZVp0M1VQNnNuYUJfZ2d6NHdYY1E&usp=sharing Bundle Production Progress]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dEpSYjluMGZ0R24xdFNUYVc2emczX2c&usp=sharing Rough Cut Travelers]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dG9YTDduLVRuc01lRWxtYVA1UE0yWmc&usp=sharing Fusing Statistics]

[https://docs.google.com/document/d/1LQD5f2govyEr8BVe1Ef-K0yX9ATXbi9DUd3kaDsT1Qs/edit?usp=sharing Fiber Heating Data (Straightening and Bending)]

= Formatting Examples =
[[Wiki Formatting Examples]]

=Lab Maps=

[[Map of Lab 403]]

[[Map of Lab 405]]

Construction of the Full-Scale Tagger Microscope

2015-01-16T15:12:25Z

Liana: /* Current Work */

=Current Work=
We are currently in production of 12 additional fiber bundles to replace bundles which are currently installed in the microscope. We found that our light guide fibers were not double clad, but were only single clad. In August and September of 2014, we received a new order of BCF-98 and BCF-20 which we verified as multi-clad using EDX techniques. In addition to having a second cladding layer, we are also attempting to maintain the optical qualities best by minimizing strain on fibers by removing some of the fiber procedures.

Current progress is being kept in the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1AZPVzbwDgBWl5UXUVSnz_8_0yO6rmNUTt_MeylHasTQ/ Fibers - 2015 Google Spreadsheet].

=Procedures for Tagger Microscope Construction=

[[Fiber Rough Cut Procedure]]

[[Straightening Light Guides Procedure]]<i> Discontinued Jan 2015</i>

[[Fiber Cleaning Procedure]] <i> Discontinued Summer 2014 </i>

[[End Milling Procedure]]

[[Fiber Polishing Procedure]]

[[Fiber Fusing Procedure]]

[[Fiber Bending Procedure]] <i> Discontinued Jan 2015 </i>

[[Fiber Painting Procedure]]<i> Discontinued May 2014 </i>

Fiber Gluing Procedure <i> Discontinued Spring 2014 </i>

[[Fiber Testing Procedure]]

=A List of Specifications/Manuals for Items in Lab 405=

This page has the documentation for the various procedures and pieces of equipment that are used in the bending tank, the splicing unit, and elsewhere in 405.
[[Documents for 405]]

=Miscellaneous Fiber Testing=

Below are the various tests that were conducted on the fibers to determine their durability when in contact with the alcohol that will be used to clean them. Also included are the strength tests that were conducted on the fibers that were fused with the old ferrules.

[[Alcohol Tests]]

[[Epoxy Tests]]

[[Strength Tests]]

[[Fiber Painting]]

[[Visual Inspection]]

===Ferrule Measurements===

In hopes of understanding the bulge in the spliced region of the fibers, the ferrules they are spliced in were photographed under a microscope and measured using a tracker program that allows for in-photo calibration and measurement. The ferrules were placed as perpendicular to the table as possible in order to get the most flat, head on shot of the ferrules. The error in the measurement of the angles was quite high. Moving the compass only a little bit (in the tracker program) lead to very different degrees read. Because of this I would estimate the angle to be off anywhere from +- 1-2 degrees. I would say that the lengths measured have an error on the order of +- .05-.1 mm

[[Measurement Photographs]]

[[New Ferrule Measurement Photographs]]

=Quality Control Procedures=
Fiber transmission measurements were carried out in Lab 402 using a flash ADC and a VME-based data acquisition system that was loaned to UConn by Jefferson Lab. Our contact at Jlab for this system is Alex Somov. Setup and operation of the CODA data acquisition platform is described [[Data Acquisition using CODA|here]].
*[[Description and Layout of the VME Data Acquisition Setup]]
*[[Procedure for Operation of CODA Run Control]]
*[[Creating/Editing mSQL Databases for CODA]]
*[http://halldweb1.jlab.org/wiki/index.php/Private:UConn_test_setup Alex Somov's instructions for running the CODA-based DAQ]
*[[media:Jlab_VME_discriminator_manual.pdf|VME discriminator manual]]
*[[media:FADC250UsersManual.pdf|VME FADC250 manual]]
*[[media:Jlab_F1_TDC_manual.pdf|VME F1TDC manual]]
*[http://zeus.phys.uconn.edu/halld/tagger/fp-microscope/fiberQA-2-2014/analyzer Analyzer] - software package that extracts pulse information from CODA data files and stores them in a root tree.

=Lab Journals / Research Progress=

The following page has the lab journals of Ann Marie and the undergraduate workers.
[[Lab Journals]]

=Past Goals and Production Documents=
If you want to see our previous construction goals you can access them below.

[https://docs.google.com/document/d/15OreBfdhb5mdpdXz6KMTVQt8ZWMU-4OV9i8Y6vp97Ms/edit?usp=sharing Construction Plan for the Tagger Microscope and Active Collimator]

[[Previous Construction Goals]]

[[List of CAD Drawings]]

[[LabView Program Explanation]] - This page details the work that has gone into the LabView program that was written to control the heaters and pumps for the bending tank in 405.

===Temperature Measurements===
This section describes the work that has gone into the construction of the thermistor for the bending tank in 405. It also has some materials devoted to describing the function and properties of a thermistor and the method used to build the one used here.

[[Thermistor Construction Journal]]

===Filling Tank / Filling PVC / Water Quality Information===

[[AMCImportant procedure to follow when filling the tank | Important procedure to follow when filling the tank]]

[[Water Tank Instructions and Diagrams]]

[[AMCPictures | Pictures]]

[[Water Quality Testing]]

Machine Shop Priorities are located [https://docs.google.com/document/d/1cuyRrSL8Mys-pou9SrYp-X7JCkTfnyDlzEaayu2f7Vg/edit?usp=sharing| here]

===Past Bundle Production Documents===
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dFVyZVp0M1VQNnNuYUJfZ2d6NHdYY1E&usp=sharing Bundle Production Progress]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dEpSYjluMGZ0R24xdFNUYVc2emczX2c&usp=sharing Rough Cut Travelers]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dG9YTDduLVRuc01lRWxtYVA1UE0yWmc&usp=sharing Fusing Statistics]

[https://docs.google.com/document/d/1LQD5f2govyEr8BVe1Ef-K0yX9ATXbi9DUd3kaDsT1Qs/edit?usp=sharing Fiber Heating Data (Straightening and Bending)]

= Formatting Examples =
[[Wiki Formatting Examples]]

=Lab Maps=

[[Map of Lab 403]]

[[Map of Lab 405]]

Construction of the Full-Scale Tagger Microscope

2015-01-16T15:07:14Z

Liana:

=Current Work=
We are currently in production of 12 additional fiber bundles to replace the low-performing bundles from the last production run. Current progress is being kept in the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1AZPVzbwDgBWl5UXUVSnz_8_0yO6rmNUTt_MeylHasTQ/ Fibers - 2015 Google Spreadsheet].

=Procedures for Tagger Microscope Construction=

[[Fiber Rough Cut Procedure]]

[[Straightening Light Guides Procedure]]<i> Discontinued Jan 2015</i>

[[Fiber Cleaning Procedure]] <i> Discontinued Summer 2014 </i>

[[End Milling Procedure]]

[[Fiber Polishing Procedure]]

[[Fiber Fusing Procedure]]

[[Fiber Bending Procedure]] <i> Discontinued Jan 2015 </i>

[[Fiber Painting Procedure]]<i> Discontinued May 2014 </i>

Fiber Gluing Procedure <i> Discontinued Spring 2014 </i>

[[Fiber Testing Procedure]]

=A List of Specifications/Manuals for Items in Lab 405=

This page has the documentation for the various procedures and pieces of equipment that are used in the bending tank, the splicing unit, and elsewhere in 405.
[[Documents for 405]]

=Miscellaneous Fiber Testing=

Below are the various tests that were conducted on the fibers to determine their durability when in contact with the alcohol that will be used to clean them. Also included are the strength tests that were conducted on the fibers that were fused with the old ferrules.

[[Alcohol Tests]]

[[Epoxy Tests]]

[[Strength Tests]]

[[Fiber Painting]]

[[Visual Inspection]]

===Ferrule Measurements===

In hopes of understanding the bulge in the spliced region of the fibers, the ferrules they are spliced in were photographed under a microscope and measured using a tracker program that allows for in-photo calibration and measurement. The ferrules were placed as perpendicular to the table as possible in order to get the most flat, head on shot of the ferrules. The error in the measurement of the angles was quite high. Moving the compass only a little bit (in the tracker program) lead to very different degrees read. Because of this I would estimate the angle to be off anywhere from +- 1-2 degrees. I would say that the lengths measured have an error on the order of +- .05-.1 mm

[[Measurement Photographs]]

[[New Ferrule Measurement Photographs]]

=Quality Control Procedures=
Fiber transmission measurements were carried out in Lab 402 using a flash ADC and a VME-based data acquisition system that was loaned to UConn by Jefferson Lab. Our contact at Jlab for this system is Alex Somov. Setup and operation of the CODA data acquisition platform is described [[Data Acquisition using CODA|here]].
*[[Description and Layout of the VME Data Acquisition Setup]]
*[[Procedure for Operation of CODA Run Control]]
*[[Creating/Editing mSQL Databases for CODA]]
*[http://halldweb1.jlab.org/wiki/index.php/Private:UConn_test_setup Alex Somov's instructions for running the CODA-based DAQ]
*[[media:Jlab_VME_discriminator_manual.pdf|VME discriminator manual]]
*[[media:FADC250UsersManual.pdf|VME FADC250 manual]]
*[[media:Jlab_F1_TDC_manual.pdf|VME F1TDC manual]]
*[http://zeus.phys.uconn.edu/halld/tagger/fp-microscope/fiberQA-2-2014/analyzer Analyzer] - software package that extracts pulse information from CODA data files and stores them in a root tree.

=Lab Journals / Research Progress=

The following page has the lab journals of Ann Marie and the undergraduate workers.
[[Lab Journals]]

=Past Goals and Production Documents=
If you want to see our previous construction goals you can access them below.

[https://docs.google.com/document/d/15OreBfdhb5mdpdXz6KMTVQt8ZWMU-4OV9i8Y6vp97Ms/edit?usp=sharing Construction Plan for the Tagger Microscope and Active Collimator]

[[Previous Construction Goals]]

[[List of CAD Drawings]]

[[LabView Program Explanation]] - This page details the work that has gone into the LabView program that was written to control the heaters and pumps for the bending tank in 405.

===Temperature Measurements===
This section describes the work that has gone into the construction of the thermistor for the bending tank in 405. It also has some materials devoted to describing the function and properties of a thermistor and the method used to build the one used here.

[[Thermistor Construction Journal]]

===Filling Tank / Filling PVC / Water Quality Information===

[[AMCImportant procedure to follow when filling the tank | Important procedure to follow when filling the tank]]

[[Water Tank Instructions and Diagrams]]

[[AMCPictures | Pictures]]

[[Water Quality Testing]]

Machine Shop Priorities are located [https://docs.google.com/document/d/1cuyRrSL8Mys-pou9SrYp-X7JCkTfnyDlzEaayu2f7Vg/edit?usp=sharing| here]

===Past Bundle Production Documents===
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dFVyZVp0M1VQNnNuYUJfZ2d6NHdYY1E&usp=sharing Bundle Production Progress]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dEpSYjluMGZ0R24xdFNUYVc2emczX2c&usp=sharing Rough Cut Travelers]

[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dG9YTDduLVRuc01lRWxtYVA1UE0yWmc&usp=sharing Fusing Statistics]

[https://docs.google.com/document/d/1LQD5f2govyEr8BVe1Ef-K0yX9ATXbi9DUd3kaDsT1Qs/edit?usp=sharing Fiber Heating Data (Straightening and Bending)]

= Formatting Examples =
[[Wiki Formatting Examples]]

=Lab Maps=

[[Map of Lab 403]]

[[Map of Lab 405]]

Visual Inspection

2014-09-24T17:15:50Z

Liana: /* 2nd Shipment of fibers */

==Cladding==
The following end-on pictures were taken of a scintillating fiber and a light guide segment under a microscope, after the ends have been polished using office paper. From these pictures, it is difficult to discern any difference between multi-clad fiber and single-clad. The scintillating fiber (light blue-green tint) is multi-clad according to the manufacturer Saint-Gobain, whereas the light guide in these photographs is single-cladding fiber.

<table>
<tr><td>[[image:fiber_004-4-2014.jpg|250px]]</td><td>[[image:fiber_005-4-2014.jpg|250px]]</td><td>[[image:fiber_006-4-2014.jpg|250px]]</td><td>[[image:fiber_007-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_008-4-2014.jpg|250px]]</td><td>[[image:fiber_009-4-2014.jpg|250px]]</td><td>[[image:fiber_010-4-2014.jpg|250px]]</td><td>[[image:fiber_011-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_012-4-2014.jpg|250px]]</td><td>[[image:fiber_013-4-2014.jpg|250px]]</td><td>[[image:fiber_014-4-2014.jpg|250px]]</td><td>[[image:fiber_015-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_016-4-2014.jpg|250px]]</td><td>[[image:fiber_017-4-2014.jpg|250px]]</td><td>[[image:fiber_018-4-2014.jpg|250px]]</td><td>[[image:fiber_019-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_020-4-2014.jpg|250px]]</td><td>[[image:AMCIMG_0022.JPG|250px]]</td><td>[[image:AMCIMG_0023.JPG|250px]]</td></tr>
</table>
===2nd Shipment of fibers===
The following fibers were taken by Jim of the new shipment of multi-clad light guides. It is believed that these fibers are indeed multi-clad because these new fibers resemble the old scintillating fibers in thickness along the straight ends of the fiber and roundness at the edges.
<table>
<tr><td>[[image:LH_VisInsp_2ndShip_01.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_02.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_03.jpg|250px]]</td></tr>
<tr><td>[[image:LH_VisInsp_2ndShip_04.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_05.jpg|250px]]</td>
</table>

==Effects of Painting and Cleaning==
These are photos of fiber 3 of Bundle 7. We are looking to see if there is any damage that can be seen on the areas of a fiber which were painted and cleaned in comparison to the area which the fiber was never painted.

===Unpainted, Straight===
These are photos of the straight section of fiber which was never painted.
<table>
<tr><td>[[image:LH-VisInsp-04292014-1.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-2.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-3.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-4.jpg|250px]]</td></tr></table>

===Painted and Cleaned, Straight===
These photos are from the long section of fiber which was painted and then cleaned with water and a cloth.

<table><tr><td>[[image:LH-VisInsp-04292014-5.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-6.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-7.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-8.jpg|250px]]</td></tr></table>

===Painted and Cleaned Fuse===
Photos of the Fuse site can be seen on the [[Visual Inspection Photos 4-28-2014]] page.

==Testing a Heated Cleaning Process==
This is fiber 13 of Bundle 7. This fiber was placed in steam before the paint was removed with water and a cloth. The paint did come off easier. The first three photos are of the unpainted section of fiber and the second three photos are of the cleaned section of fiber which were cleaned after being steamed.
====Unpainted, Straight====
<table><tr><td>[[image:LH-VisInsp-04292014-9.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-10.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-11.jpg|250px]]</td></tr></table>
====Painted and Cleaned, Straight====
<table><tr><td>[[image:LH-VisInsp-04292014-12.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-13.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-14.jpg|250px]]</td></tr></table>

File:LH VisInsp 2ndShip 05.jpg

2014-09-24T17:12:27Z

Liana:

File:LH VisInsp 2ndShip 04.jpg

2014-09-24T17:12:14Z

Liana:

File:LH VisInsp 2ndShip 03.jpg

2014-09-24T17:12:01Z

Liana:

File:LH VisInsp 2ndShip 02.jpg

2014-09-24T17:11:49Z

Liana:

File:LH VisInsp 2ndShip 01.jpg

2014-09-24T17:11:31Z

Liana:

Visual Inspection

2014-09-24T17:10:44Z

Liana:

==Cladding==
The following end-on pictures were taken of a scintillating fiber and a light guide segment under a microscope, after the ends have been polished using office paper. From these pictures, it is difficult to discern any difference between multi-clad fiber and single-clad. The scintillating fiber (light blue-green tint) is multi-clad according to the manufacturer Saint-Gobain, whereas the light guide in these photographs is single-cladding fiber.

<table>
<tr><td>[[image:fiber_004-4-2014.jpg|250px]]</td><td>[[image:fiber_005-4-2014.jpg|250px]]</td><td>[[image:fiber_006-4-2014.jpg|250px]]</td><td>[[image:fiber_007-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_008-4-2014.jpg|250px]]</td><td>[[image:fiber_009-4-2014.jpg|250px]]</td><td>[[image:fiber_010-4-2014.jpg|250px]]</td><td>[[image:fiber_011-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_012-4-2014.jpg|250px]]</td><td>[[image:fiber_013-4-2014.jpg|250px]]</td><td>[[image:fiber_014-4-2014.jpg|250px]]</td><td>[[image:fiber_015-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_016-4-2014.jpg|250px]]</td><td>[[image:fiber_017-4-2014.jpg|250px]]</td><td>[[image:fiber_018-4-2014.jpg|250px]]</td><td>[[image:fiber_019-4-2014.jpg|250px]]</td></tr>
<tr><td>[[image:fiber_020-4-2014.jpg|250px]]</td><td>[[image:AMCIMG_0022.JPG|250px]]</td><td>[[image:AMCIMG_0023.JPG|250px]]</td></tr>
</table>
===2nd Shipment of fibers===
The following fibers were taken by Jim of the new shipment of multi-clad light guides.
<table>
<tr><td>[[image:LH_VisInsp_2ndShip_01.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_02.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_03.jpg|250px]]</td></tr>
<tr><td>[[image:LH_VisInsp_2ndShip_04.jpg|250px]]</td><td>[[image:LH_VisInsp_2ndShip_05.jpg|250px]]</td>
</table>

==Effects of Painting and Cleaning==
These are photos of fiber 3 of Bundle 7. We are looking to see if there is any damage that can be seen on the areas of a fiber which were painted and cleaned in comparison to the area which the fiber was never painted.

===Unpainted, Straight===
These are photos of the straight section of fiber which was never painted.
<table>
<tr><td>[[image:LH-VisInsp-04292014-1.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-2.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-3.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-4.jpg|250px]]</td></tr></table>

===Painted and Cleaned, Straight===
These photos are from the long section of fiber which was painted and then cleaned with water and a cloth.

<table><tr><td>[[image:LH-VisInsp-04292014-5.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-6.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-7.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-8.jpg|250px]]</td></tr></table>

===Painted and Cleaned Fuse===
Photos of the Fuse site can be seen on the [[Visual Inspection Photos 4-28-2014]] page.

==Testing a Heated Cleaning Process==
This is fiber 13 of Bundle 7. This fiber was placed in steam before the paint was removed with water and a cloth. The paint did come off easier. The first three photos are of the unpainted section of fiber and the second three photos are of the cleaned section of fiber which were cleaned after being steamed.
====Unpainted, Straight====
<table><tr><td>[[image:LH-VisInsp-04292014-9.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-10.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-11.jpg|250px]]</td></tr></table>
====Painted and Cleaned, Straight====
<table><tr><td>[[image:LH-VisInsp-04292014-12.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-13.jpg|250px]]</td><td>[[image:LH-VisInsp-04292014-14.jpg|250px]]</td></tr></table>

Fiber QA Troubleshooting

2014-08-15T14:03:11Z

Liana: /* Previous Procedures */

Troubleshooting of the QA Procedure required many runs and a few weeks. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

==Fiber Class==
We wanted to see if there was a correlation between painting/gluing and the photon yield of the fibers. We decided to place each fiber into a separate fiber class depending on the current state of the fiber. The fiber classes are as follows:
*SG - untouched fibers from Saint Gobain
*S - straightened but not fused
*F - straightened and fused
*B - bent and never painted
*P - painted
*.5P - half painted
*U - paint removed (unpainted)

==Previous Procedures==
*Metal clamps and wires were previously used to secure the bundles of 15 to the fibers' popsicle sticks. We then graduated to using only one metal clamp over two 15-fiber bundles and two kapton strips per popsicle stick.
[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place.]]
*We are currently working on making the paper spacings procedure easier.
[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The following photos were taken before the pulser circuit was fixed (added around June 16th) and before the pulser ran on a power supply. The pulser was modified to run on a power supply on July 3rd, 2014. You can see the results of this change on the "Scramble on Power Supply" page of the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Fiber QA Troubleshooting Google Doc]
{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]
|}

* The initial procedure for paper spacing was to place paper under the kapton strips, but we later found that it caused too much of a gap between the scintillators. The paper spacers were then only placed at the beginning of the S-bend.
[[File:LH-FiberQA_SciFiPaper.jpg|thumb|center|A view of the scintillating fibers directly after paper spacers have been placed and the fibers are flush.]]

Fiber Testing Procedure

2014-08-15T14:01:46Z

Liana: /* Procedure */

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]
[[File:LH-FiberQA_Darkbox.jpg|thumb|left|The darkbox open and empty. The black plastic is pulled back and suspended with wires so you can see both sides: the pulser side and the chimney side.]]
*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k/|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the clean popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*On a large table/workbench, sort the fibers into the 6 columns of 5 fibers.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to use the bundling tool for this process and support the fiber using the Bundling Support. Be sure the fiber ends are secured and not bent at the end.

*Continue this process with the remaining columns.

[[File:LH-FiberQA_BendingSupport.jpg|thumb|center|The bending support constructed to aid in the process of bundling for Fiber QA.]]

*Once the fibers are in the order they belong, place them on the popsicle stick and secure the metal clamp and the downstream kapton strip.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Tighten the second kapton strip over the fibers, making sure the fibers do not tangle and are in the two 3x5 orientations. The kapton strip should be tight enough that the fibers don't lose orientation but should slide through.

*Using the end of the bundling tool or any other flat surface, make the upstream 15 fibers flush to the edge of the popsicle stick. Once this is set, cut a small portion of wooden stirrer and place it under the 1st kapton strip. Pull the kapton strip tight and secure it. You should be done securing the upstream 15 fibers.

*With the upstream set of 15 secure, it's much easier to secure the second 15 fibers. Loosen the middle kapton strip and using the same process as with the upstream 15 fibers, make the downstream 15 fibers flush against the edge of the popsicle stick. Once flush, put another portion of wood stirrer under the middle kapton strip. Pull down the kapton strip tight and secure it in place.

*To add paper spacers, use the cardstock and cut them into pieces that are about the width of 3 fibers.

*Place paper spacers between the rows and columns of each set of 15. They should be at the beginning of the S-bends and after the middle kapton strip.

*Once both upstream kapton strips are tight and have the wood stirrer, place a wood stirrer under the last downstream kapton strip, pull it tight and secure it.

[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully open the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!
**Use the mirror tool to see the scintillating fibers.

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
[[File:LH-FiberQA_FibersChimney.jpg|thumb|left|Marco and Suki carefully placing the fibers into their respective chimneys.]]
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. Channel 1 on each chimney is the channel closest to the backplane.
**Check that each fiber is flush against the chimney edge using touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Apply even pressure to the ends of the preamp boards until they are in place. Do not push so hard that it is bending the backplane. If needed, just place the preamp support end and screw it into the preamp supports until they are flush.
*Close the main dark box opening and lock it tight to ensure that it is light sealed.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics starting with the power for the control board.
**Watch the control board's power supply current. If it exceeds. 0.38 amps, let a lab technician know immediately!
{|style="margin: 0 auto;"
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|[[File:LH-FiberQA_Electronics.jpg|thumb|center|A view of the power supplies for the backplane and control board.]]
|[[File:LH-FiberQA_Backplane.jpg|thumb|center|A view of the backplane.]]
|}
*Have a lab technician or grad student check the VBias after about 15-20 minutes of the control board being on.
*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student or lab technician.
*Input the run from the data into the Google docs spreadsheet. Note the time of request and run, as well as the people involved in the run.

Fiber Testing Procedure

2014-07-29T16:14:01Z

Liana: /* Procedure */

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]
[[File:LH-FiberQA_Darkbox.jpg|thumb|left|The darkbox open and empty. The black plastic is pulled back and suspended with wires so you can see both sides: the pulser side and the chimney side.]]
*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each on a flat surface.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first. It is best to use the bundling tool for this process and support the fiber using the Bundling Support. Be sure the fiber ends are secured and not bent at the end.

*Continue this process with the remaining columns.

[[File:LH-FiberQA_BendingSupport.jpg|thumb|center|The bending support constructed to aid in the process of bundling for Fiber QA.]]

*Once the fibers are in the order they belong, place them on the popsicle stick and secure the metal clamp and the end kapton strip.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .25 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the two bundles of 15.

*Next, put strips of paper between each of the columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.
[[File:LH-FiberQA_SciFiPaper.jpg|thumb|center|A view of the scintillating fibers directly after paper spacers have been placed and the fibers are flush.]]

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding another popsicle stick inverted along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed to the edge, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips and the wooden stick underneath. The popsicle stick should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick. Place a short piece of wood between the top of the fibers and the kapton. This helps pull all fibers tight to the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully open the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
[[File:LH-FiberQA_FibersChimney.jpg|thumb|left|Marco and Suki carefully placing the fibers into their respective chimneys.]]
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. Channel 1 on each chimney is the channel closest to the backplane.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics starting with the power for the control board.
**Watch the control board's power supply current. If it exceeds. 0.38 amps, let a lab technician know immediately!
{|style="margin: 0 auto;"
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|[[File:LH-FiberQA_Electronics.jpg|thumb|center|A view of the power supplies for the backplane and control board.]]
|[[File:LH-FiberQA_Backplane.jpg|thumb|center|A view of the backplane.]]
|}
*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student or lab technician.

File:LH-FiberQA SciFiPaper.jpg

2014-07-29T16:13:34Z

Liana:

File:LH-FiberQA BendingSupport.jpg

2014-07-29T16:13:12Z

Liana:

Fiber Testing Procedure

2014-07-29T16:12:56Z

Liana: /* Procedure */

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]
[[File:LH-FiberQA_Darkbox.jpg|thumb|left|The darkbox open and empty. The black plastic is pulled back and suspended with wires so you can see both sides: the pulser side and the chimney side.]]
*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each on a flat surface.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first. It is best to use the bundling tool for this process and support the fiber using the Bundling Support. Be sure the fiber ends are secured and not bent at the end.

*Continue this process with the remaining columns.

[[File:LH-FiberQA_BendingSupport.jpg|center|The bending support constructed to aid in the process of bundling for Fiber QA.]]

*Once the fibers are in the order they belong, place them on the popsicle stick and secure the metal clamp and the end kapton strip.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .25 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the two bundles of 15.

*Next, put strips of paper between each of the columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.
[[File:LH-FiberQA_SciFiPaper.jpg|center|A view of the scintillating fibers directly after paper spacers have been placed and the fibers are flush.]]

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding another popsicle stick inverted along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed to the edge, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips and the wooden stick underneath. The popsicle stick should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick. Place a short piece of wood between the top of the fibers and the kapton. This helps pull all fibers tight to the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully open the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
[[File:LH-FiberQA_FibersChimney.jpg|thumb|left|Marco and Suki carefully placing the fibers into their respective chimneys.]]
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. Channel 1 on each chimney is the channel closest to the backplane.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics starting with the power for the control board.
**Watch the control board's power supply current. If it exceeds. 0.38 amps, let a lab technician know immediately!
{|style="margin: 0 auto;"
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|[[File:LH-FiberQA_Electronics.jpg|thumb|center|A view of the power supplies for the backplane and control board.]]
|[[File:LH-FiberQA_Backplane.jpg|thumb|center|A view of the backplane.]]
|}
*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student or lab technician.

File:LH-FiberQA Backplane.jpg

2014-07-17T15:58:05Z

Liana:

File:LH-FiberQA FibersChimney.jpg

2014-07-17T15:57:40Z

Liana:

Fiber Testing Procedure

2014-07-17T15:56:22Z

Liana: /* Procedure */

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]
[[File:LH-FiberQA_Darkbox.jpg|thumb|left|The darkbox open and empty. The black plastic is pulled back and suspended with wires so you can see both sides: the pulser side and the chimney side.]]
*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the wide clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popsicle stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
[[File:LH-FiberQA_FibersChimney.jpg|thumb|left|Marco and Suki carefully placing the fibers into their respective chimneys.]]
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. Channel 1 on each chimney is the channel closest to the backplane.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics.
{|style="margin: 0 auto;"
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|[[File:LH-FiberQA_Electronics.jpg|thumb|center|A view of the power supplies for the backplane and control board.]]
|[[File:LH-FiberQA_Backplane.jpg|thumb|center|A view of the backplane.]]
|}
*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student.

File:LH-FiberQA Electronics.jpg

2014-07-17T15:42:56Z

Liana:

File:LH-FiberQA PulserPower.jpg

2014-07-17T15:42:25Z

Liana:

File:LH-FiberQA Darkbox.jpg

2014-07-17T15:41:57Z

Liana:

File:LH-FiberQA Preamp.jpg

2014-07-17T15:41:29Z

Liana:

Fiber Testing Procedure

2014-07-17T15:39:56Z

Liana: /* Procedure */

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the wide clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popsicle stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

[[File:LH-FiberQA_Preamp.jpg|thumb|center]]

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the pre-amp board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

[[File:LH-FiberQA_Darkbox.jpg|thumb|center]]
*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.

[[File:LH-FiberQA_PulserPower.jpg|thumb|center]]
[[File:LH-FiberQA_Electronics.jpg|thumb|center]]

*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and 10 V. Next turn on the power supply for the pre-amps and backplane electronics.

*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student.

Fiber QA Troubleshooting

2014-07-14T18:33:33Z

Liana:

Fiber QA Troubleshooting

2014-07-14T18:10:44Z

Liana:

Troubleshooting of the QA Procedure required many runs and a few weeks. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

==Previous Procedures==
*Metal clamps and wires were previously used to secure the bundles of 15 to the fibers' popsicle sticks. We then graduated to using only one metal clamp over two 15-fiber bundles and two kapton strips per popsicle stick.
[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place.]]
*We are currently working on making the paper spacings procedure easier.
[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The following photos were taken before the pulser circuit was fixed (added around June 16th) and before the pulser ran on a power supply. The pulser was modified to run on a power supply on July 3rd, 2014. You can see the results of this change on the "Scramble on Power Supply" page of the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Fiber QA Troubleshooting Google Doc]
{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]
|}

Fiber Testing Procedure

2014-07-14T17:57:47Z

Liana:

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the wide clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popsicle stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.

*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and 10 V. Next turn on the power supply for the pre-amps and backplane electronics.

*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student.

Fiber Testing Procedure

2014-07-14T17:36:55Z

Liana:

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

==Fiber QA Troubleshooting==
We made our testing darkbox from scratch so we had to configure electronics and troubleshoot issues with the Fiber QA Procedures. You can read the details of these effors on the [[Fiber QA Troubleshooting]] page, but they are summarized below:

Fibers will be issued a new name after QA in the form of a bundle number, followed by a colon and then a fiber number. The diagram below shows how the fibers are positioned as viewed within the fibers, looking from the light guides out through the SciFis. [[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k|Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working. Also grab 3 kapton strips from the kapton strip box along with accompanying bolts and washers.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room. The fibers not attached to a popsicle stick are sorted by bending bundle name.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the wide clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popsicle stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
**Do this for both bundles of 15.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

*Cover the fibers with the black cloth. Be careful not to cover the path from the mirror to the off-set bundle!
{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}
*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.
*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order.
**Check that each fiber is flush against the chimney edge using a straight piece of metal, followed by a check via touch, and finally, visually inspect using the light/mirror.
**If any fibers are not flush against the edge, re-do the previous step.
*'''Have a lab technician check the fibers at this step.''' The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and 10 V. Next turn on the power supply for the pre-amps and backplane electronics.

*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student.

File:LH-FiberTesting-QANomenclature.png

2014-07-14T16:53:35Z

Liana: Liana uploaded a new version of "File:LH-FiberTesting-QANomenclature.png": Reverted to version as of 16:50, 14 July 2014

File:LH-FiberTesting-QANomenclature.png

2014-07-14T16:51:52Z

Liana: Liana uploaded a new version of "File:LH-FiberTesting-QANomenclature.png"

File:LH-FiberTesting-QANomenclature.png

2014-07-14T16:50:36Z

Liana: Liana uploaded a new version of "File:LH-FiberTesting-QANomenclature.png"

LH Summer 2014

2014-07-11T20:42:57Z

Liana:

This summer I worked primarily on Fiber QA. My daily work journal can be found [https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc here.] I'll summarize my tests here.

[https://docs.google.com/a/uconn.edu/document/d/1g3crUNgvU7wQwyvxp6mmV_luxhTwCaMqz10M0WSwESY/edit Here] is Marco Campelli's Lab Journal.

[https://docs.google.com/document/d/16ozFDsAr2lJlqJ8h-xtIPa_aUTPgPVwFuD5-SUQ5G24/edit Here] is Suki Hyman's Lab Journal.

==Results of Preliminary Fiber Tests==
All preliminary fiber testing was recorded [https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 here].

Before we could run through all bundles through QA tests, we had to calibrate and standardize the QA testing procedure. We found the following sources of error:
*'''Laser Intensity''' - if the laser is brighter, each fiber will result in a higher photon yield. Dr. Jones has compensated for this. We also found that the photon yields decrease as the pulser's 9V battery is drained.
*'''Temperature of the SiPM board/Time Between Runs''' - we found that as the fiber runs were done repeatedly without turning off the electronics and removing the board, the photon yield decreases. Dr. Jones ran a script which automated the run process so that the runs began at the beginning of each hour. This histogram was made of 15 runs of 15 fibers (resulting in 255 data points) at approximately the same temperature (same time between runs) and compares each photon yield to the average over all runs. The standard deviation of any given ratio was 0.03
[[File:LH_prelimfibertests_temp.png|thumb|center|A histogram of the ratio of photon yields from each fiber compared to the average. This includes 225 data points.]]

*'''Depth of the fibers in the chimney''' - We found that differences as small as 0.5 mm can have a minor affect on the photon yields. These histograms show the ratio of photon yields after a 0.5 mm or 1.0 mm fiber retraction to the photon yield while flush. The mean ratio for the 0.5 mm test was 0.95 with a standard deviation of 0.05 and the mean ratio for the 1.0 mm experiment was 0.88 with a standard deviation of 0.8
{|style="margin: 0 auto;"
| [[File:LH_prelimfibertests_halfmm.png|thumb|center|A histogram of the ratio of photon yields from a fiber who was retracted 0.5 mm into the chimney compared to the a flush fiber. This includes 15 data points.]]
| [[File:LH_prelimfibertests_mm.png|thumb|center|A histogram of the ratio of photon yields from a fiber who was retracted 1.0 mm into the chimney compared to the a flush fiber. This includes 15 data points.]]
|}
*'''Overall Environmental Factors''' - I did a series of runs where between each run, I'd turn off the electronics, remove the SiPM board, remove the fibers and replace the fibers so they're flush. Here you can see the overall variation between a bunch of runs. All of this variation is variation we will be present when we do the actual runs. The mean ratio was 0.99 with a standard deviation of 0.07

[[File:LH_prelimfibertests_environ.png|thumb|center]]

*'''Paper Spacers between scintillators'''- I tested the necessity of the paper spacers between the scintillating fibers. This histogram shows the ratios of individual fibers run with paper spacers and without. This is not all the data, however, three data points were excluded. The ratios were 0.45, 0.43, and 0.74 Because the lack of paper spacing resulting in three catastrophic results, it has been decided that the paper spacing is necessary.

[[File:LH_prelimfibertests_paper.png|thumb|center]]

==Fiber QA==

Fiber QA Troubleshooting

2014-07-11T17:26:10Z

Liana:

Fiber Testing Procedure

2014-07-11T17:22:54Z

Liana:

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

[[Fiber QA Troubleshooting]]

Fibers will be issued a new name after QA consisting of a Roman Numeral for the bundle which they are from, followed by a number in parentheses which designates it's position within the bundle. The diagram below shows how the fibers are positioned as viewed from the light guide/SiPM side of the fibers. These are also how the histos are going to appear in the analyzer.
[[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

Fiber QA Troubleshooting

2014-07-11T17:22:43Z

Liana: Created page with "Troubleshooting of the QA Procedure required multiple runs of the fibers. The results of those runs were motivations for changes to the testing procedure including: modificati..."

Troubleshooting of the QA Procedure required multiple runs of the fibers. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

Fiber Testing Procedure

2014-07-11T17:22:39Z

Liana:

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.
[[Fiber QA Troubleshooting]]

Fibers will be issued a new name after QA consisting of a Roman Numeral for the bundle which they are from, followed by a number in parentheses which designates it's position within the bundle. The diagram below shows how the fibers are positioned as viewed from the light guide/SiPM side of the fibers. These are also how the histos are going to appear in the analyzer.
[[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

Fiber Testing Procedure

2014-07-11T17:22:26Z

Liana:

'''This page is currently under construction'''

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.
[Fiber QA Troubleshooting]

Fibers will be issued a new name after QA consisting of a Roman Numeral for the bundle which they are from, followed by a number in parentheses which designates it's position within the bundle. The diagram below shows how the fibers are positioned as viewed from the light guide/SiPM side of the fibers. These are also how the histos are going to appear in the analyzer.
[[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

Fiber Testing Procedure

2014-07-11T15:23:21Z

Liana:

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

Troubleshooting of the QA Procedure required multiple runs of the fibers. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

Fibers will be issued a new name after QA consisting of a Roman Numeral for the bundle which they are from, followed by a number in parentheses which designates it's position within the bundle. The diagram below shows how the fibers are positioned as viewed from the light guide/SiPM side of the fibers. These are also how the histos are going to appear in the analyzer.
[[File:LH-FiberTesting-QANomenclature.png|275px|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

Fiber Testing Procedure

2014-07-11T15:22:44Z

Liana:

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

Troubleshooting of the QA Procedure required multiple runs of the fibers. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

Fibers will be issued a new name after QA consisting of a Roman Numeral for the bundle which they are from, followed by a number in parentheses which designates it's position within the bundle. The diagram below shows how the fibers are positioned as viewed from the light guide/SiPM side of the fibers. These are also how the histos are going to appear in the analyzer.
[[File:LH-FiberTesting-QANomenclature.png|center]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

File:LH-FiberTesting-QANomenclature.png

2014-07-11T15:20:08Z

Liana:

Fiber Testing Procedure

2014-07-11T15:20:00Z

Liana:

It is important to determine light yield of each fiber before shipment to Jefferson Lab. In order to do this, light yield tests will be performed on each fiber in our dark box using a red laser diode on a pulsing circuit. The setup of the fibers is very important, as any offset fibers could give an inaccurate result. It is also important that procedure is followed to prevent damage to electronics.

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.

Troubleshooting of the QA Procedure required multiple runs of the fibers. The results of those runs were motivations for changes to the testing procedure including: modification to the pulser circuit, modification to the pulser power source, standardized methods of placing the fibers into the chimneys, and consideration of temperature in analyzing photon yield. The results of these preliminary tests can be found below:
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit?usp=drive_web Ann Marie's Troubleshooting Tests] before the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/spreadsheets/d/1SNiHFm5fo_8yHHBrvuciXn_IRJ8aHT6QC_DbKERF3K0/edit#gid=101819727 Liana's Troubleshooting Tests] after the pulser circuit was modified
*[https://docs.google.com/a/uconn.edu/document/d/1mGxw-1p69iodf4hJz1tTTfBxgvfdGpDbZynqvXzYCLc/edit# Liana's Work Journal] and [http://zeus.phys.uconn.edu/wiki/index.php/LH_Summer_2014 Liana's Summer Wiki Page] accompany her Troubleshooting tests which describes more in-depth the thought process and steps behind each run.

[[File:LH-FiberTesting-QANomenclature.png]]

==Procedure==
[[File:LH-FiberTesting-CleanRoom.jpg|thumb|right|upright|The ventilated clean room with a workbench, the dark box, and all necessary electronics.]]

*Before taking any fibers out of the dark room, open the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1T4NUSQO_keT0QckCx4rWlbMW7Yot4vb-Z1eqrM1l94k| Fiber QA] Google Doc. Each bundle has a separate tab which you can view the alignments required for each run.

*Before selecting fibers from their dark room, don a pair of powder free gloves and place the popsicle stick with the testing clamps at the table you will be working.

*Note which fibers are to be tested during the run and take only those fibers out of the dark room.

*If no meeting is going on in the conference room, bring the fibers in there and turn off all the lights.
**If someone is in the conference room, the clean room is a good alternative.

*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.

*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.

*Continue this process with the remaining columns.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.

[[File:LH-FiberTesting-PopStickClamp.jpg|thumb|center|upright|The popsicle stick with clamp and wires to hold the fibers in place. We're working on a different model which would use mylar to hold the fibers down.]]

*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.

*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.

*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.

*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.

[[File:LH-FiberTesting-PaperSpacers.jpg|thumb|center|upright|A view of 15 flush fibers separated with paper spacers between each row and column.]]

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.

*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.

*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.

*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.

*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''

{|style="margin: 0 auto;"
| [[File:LH-FiberTesting-Pulsar1.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from the main opening of the dark box.]]
| [[File:LH-FiberTesting-Pulsar2.jpg|thumb|center|upright|Image of the fibers, mirror and pulsar from along the fibers.]]
|}

*Guide the fiber ends over the edge and using the Google Document, place the fibers into the chimney in the correct order. '''Have a grad student or lab technician check the fibers at this step. The fibers cannot be too far into the chimneys or else they will damage the SiPMs when the board is replaced. A grad student or lab technician must put the SiPM board back into place.'''

[[File:LH-FiberTesting-InsideDarkBox.jpg|thumb|center|upright|View of the fibers from the main opening of the dark box. Black plastic separates the scintillating fiber end and pulsar from the chimneys and SciPMs.]]

*Let the black plastic divider down and Velcro the top opening shut so no light passes from the pulsar side to the SiPM side of the dark box.

*Close the main dark box opening and ensure that it is light sealed.

*Turn on the electronics and begin the fiber test.

User:Liana

2014-07-10T18:34:08Z

Liana:

<big>'''Liana Hotte'''</big><br>
Undergraduate Researcher<br>
Physics Department, University of Connecticut

A list of my journals, sorted by semester can be found [http://zeus.phys.uconn.edu/wiki/index.php/Lab_Journals#Liana_Hotte.27s_Lab_Journal_.2F_Research_Progress here]

''email'': liana.hotte@uconn.edu