Difference between revisions of "Construction of the Full-Scale Tagger Microscope"

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='''Preparations for Construction of the Full-Scale Tagger Microscope'''=
+
=Current Work=
−
'''
+
==Summer 2017==
 +
This summer, I (Micah Warren) am constructing seven new bundles to replace old ones in the tagger microscope. The following pages provide documentation:
  
−
==Current Work==
+
[[Rough Cut Documentation Summer 2017]]
  
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* Determine an ideal process to assemble components of the fiber splicing unit.
+
[[Pockmark Documentation Summer 2017]]
  
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* Optimize and document a reliable, repeatable process for fusing 2mm x 2mm square optical fibers using a fiber splicing unit.
+
==2015 and Earlier==
 +
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.  
  
−
* Work with [[User: mcintyre|James McIntyre]] to develop polishing, gluing, painting, and quality assurance procedures for optical fibers.
+
Current progress is being kept in the [https://docs.google.com/a/uconn.edu/spreadsheets/d/1AZPVzbwDgBWl5UXUVSnz_8_0yO6rmNUTt_MeylHasTQ/ Fibers - 2015 Google Spreadsheet].
  
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* Develop/refine a LabView program that controls a water heater and water pump based on water temperature.
+
=Procedures for Tagger Microscope Construction=
  
−
==A List of Specifications/Manuals for Items in Lab 405==
+
Here is a master document which describes the procedures: [https://docs.google.com/document/d/15OreBfdhb5mdpdXz6KMTVQt8ZWMU-4OV9i8Y6vp97Ms/edit# Construction Plan for the Tagger Microscope]
  
−
[[media:DAQ.pdf|Data Acquisition Hardware]]  
+
[[Fiber Rough Cut Procedure]]
  
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[[media:NBQuickStart.pdf|Net Booter Quick Start Pamphlet]]
+
[[Fiber Numbering Procedure]]
  
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[[media:NPUserMan.pdf|Net Booter User Manual]]
+
[[Fiber Measuring Procedure]]
  
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[[media:Water_pump_specs.pdf|Water Pump]]
+
[[Fiber Bundling Procedure]]
  
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[[media:Water_heater.pdf|Water Heater]]
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[[End Milling Procedure]] <i> Discontinued Summer 2017 </i>
  
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[[media:valves.pdf|Three way sweat valve]]
+
[[Fiber Polishing Procedure]]
  
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[[media:Black Silicone Adhesive Sealant.pdf|Black Silicone Adhesive (RTV)]]
+
[[Fiber Fusing Procedure]]
  
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[[media:Ultra Black Silicone Adhesive Sealant.pdf|Ultra Black Silicone Adhesive (gasket maker)]]
+
[[Temperature Control Program|Hot Air Bending Procedure]]
  
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[[private:fiber_properties_datasheets|Polystyrene]]
+
[[Fiber Testing Procedure]]
  
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[[media:Thermocouple_op_amp.pdf|AD594AQ]]
+
[[Hot Water Straightening Light Guides Procedure]]<i> Discontinued Jan 2015</i>
  
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==Pictures==
+
[[Fiber Water Stain Cleaning Procedure]] <i> Discontinued Summer 2014 </i>
  
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From Summer 2012:
+
[[Hot Water Fiber Bending Procedure]] <i> Discontinued Jan 2015 </i>
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<gallery>
 
−
file:Room1.JPG|Preparing for construction.
 
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file:Shelving.JPG|Just before the shelving was erected.
 
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file:BuildingTank.JPG|Construction of the tank to be used in fiber bending.
 
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file:WaterTest.JPG|Testing the strength of the tank.
 
−
file:WaterTest2.JPG|testing...
 
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file:WaterTest3.JPG|Here it is easy to see the bowing from water pressure.
 
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file:FramedWaterTest.JPG|Tank with wooden supports.
 
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file:FramedAndInsulated.JPG|Tank with support and insulation. Plumbing and hot water testing are the next goals.
 
  
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</gallery>
+
[[Fiber Painting Procedure]]<i> Discontinued May 2014 </i>
  
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==LabView Program==
+
Fiber Gluing Procedure <i> Discontinued Spring 2014 </i>
  
−
During the summer of 2012, Ben Willis wrote a LabView program that would communicate with a NetBooter and ultimately control a heater and water pump. LabView also plots the temperature of water being heated, and plots the changing temperatures on a graph on the front panel. Before Ben left, he wrote a [[media:Final_Report.pdf|final report]] of his work on the program and in the lab in general. I have added a little to Ben's work, mostly housekeeping; deleting some non functioning commands, adding the equation to represent temperature based on voltage, adding an equation for a thermocouple, and connecting with the DAQ.  I also plan to make a differential op-amp to allow the DAQ to read the inputs given by the thermocouple.  In this way, we will be able to use a thermistor and two thermocouples to control the water temperature in both the straightening pipe and the bending tank.
+
=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]]
  
−
I had found a lab manual from the University of Minnesota that gave step by step instructions for taking and recording temperature measurements using a thermistor, a DAQ, and LabView.  After making the circuit and updating the LabView program it seems to be working within expected error.
 
  
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[[media:LabViewThermistor.pdf|The Lab Manual]]
+
=Fiber Statistics=
  
 +
[[Fiber Dimension Statistics]]
  
  
−
<gallery>
+
=Miscellaneous Fiber Testing=
−
File:LabViewProgram3.PNG|The front panel of the LabView program.
 
−
File:LabViewProgram1.PNG|Part 1 of the block diagram: The majority of this part of the program is to read the output given by the DAQ, translate it to a temperature, and plot the results.
 
−
File:LabViewProgram2.PNG|Part 2 of the block diagram:  The main purpose of this part of the program is to determine if the temperature read from part 1 is what was specified in the front panel, and to turn the water pump and heater on or off as appropriate. 
 
−
</gallery>
 
  
−
<gallery>
+
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.
−
File:LabViewToCompare.PNG|A view of the LabView front panel that Ben and I created. The voltage and temperature are actual readings/calculations that have been made.
 
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File:LabToCompare.PNG|A view of the lab that inspired the thermistor idea.  The numbers are a close comparison of the measured data in the previous picture.
 
−
</gallery>
 
  
 +
[[Alcohol Tests]]
  
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==Temperature Measurements==
+
[[Epoxy Tests]]
  
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Along with the LabView program, another component of bending fibers will be to determine the temperature of the water and to make that information available to the program. 
+
[[Strength Tests]]
  
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At first, I had thought that our best bet as far as reading/recording water temperature was to make a thermistor (as seen below). 
+
[[Fiber Painting]]
  
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<gallery>
+
[[Visual Inspection]]
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file:Thermistor_Circuit.jpg|A temperature measuring circuit that included a voltage divider, a resistor, and a thermistor.
 
  
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file:Thermistor.jpg|This is the same circuit as to the left, except it is free of a breadboard and water resistant.
+
===Ferrule Measurements===
−
</gallery>
 
  
 +
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
  
−
Although this thermistor is reasonably accurate, I feel that it would be possible to have (already purchased) thermocouples read the temperature instead.  The signal from the thermocouple would need to be amplified in order to be read by the DAQ we are currently using because the thermocouple produces voltages in the micro range.  Using an operational amplifier and the right resistors I am confident that I would be able to achieve a strong enough signal from the thermocouple(given enough time). The remaining hurdle in this endeavor would be to tweak the LabView program to use the temperature-voltage relationship equation of a type J thermocouple instead of a thermistor.
+
[[Measurement Photographs]]
  
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Some great resources for thermocouple theory and circuitry can be found here:
+
[[New Ferrule Measurement Photographs]]
  
−
[[media:The_Basics_of_Thermocouples.pdf|The Basics of Thermocouples]]
+
=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 - Fall 2013]]
 +
*[[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_discriminatorRevD_manual.pdf|VME discriminator manual]]
 +
*[[media:FADC250UsersManual.pdf|VME FADC250 manual]] ([[media:FADC250_V2_ADC_FPGA_V90E.pdf|firmware update 90E]], [[media:FADC250_Processing_FPGA_Firmware_ver_0x0C01.pdf|firmware update C01]])
 +
*[[media:Jlab_F1_TDC_manual.pdf|VME F1TDC manual]] ([[media:F1TDC_V2_V3_8_26.pdf|latest firmware update]])
 +
*[[media:CaenADCv792_rev18.pdf|Caen QDC v792 manual]]
 +
*[[media:TI-old-VME.pdf|VME Trigger Interface (old-style VME) manual]]
 +
*[[media:TI-new-VXS.pdf|VXS Trigger Interface (new-style VXS) manual]]
 +
*[[Operation of CODA Run Control - Fall 2015]]
 +
*[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.
  
−
[[media:Thermocouple_Application.pdf|Thermocouple Application]]
+
=Hot Air Bending Box=
 +
After our experience with with heating fibers in water for straightening and bending, we decided to change our procedure and use hot air instead of water. The following pages show information about the heating box and the program used to run it.
  
−
<gallery>
+
[[Fiber Heating Box]]<br/>
−
file:Circuit_ex.PNG| I feel that this is a place to start if I am to accurately read a thermocouple.  Included in the circuit diagram is cold junction compensation and signal amplification; two things that are a requisite to accurate measurements.
+
[[Temperature Control Program]]
−
</gallery>
 
  
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After reading the material above, I have found two (cheap) ways to read a thermocouple accurately:
+
=Intermediate Storage Box=
 +
[[Intermediate Storage Box]]
  
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1. Create something in the software that compensates for the room temperature factor at the cold junction.  If we end up using the thermistor to read the temperature at the cold junction then we will be introducing the error from one temperature measurement to another.  Although the thermistor will read the water temperature within acceptable error, adding more error into the calculation seems unnecessary to me.
+
=Lab Journals / Research Progress=
  
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2. Follow the diagram above and create a hardware approach to cold junction compensation.  After determining the voltage output of a type J thermocouple at zero degrees Celsius, I can introduce that voltage at the cold junction site.  By following the circuit above, I would probably be able to construct a circuit that would have cold junction compensation and amplification for the signal.  My concerns for this approach involve time constraints and the intricacies of this setup.
+
The following page has the lab journals of Ann Marie and the undergraduate workers.
 +
[[Lab Journals]]
  
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Although, after having found this, I think the problem may be solved.
+
=Past Goals and Production Documents=
 +
If you want to see our previous construction goals you can access them below.
  
−
[[media:Thermocouple_op_amp.pdf|Op amp designed for a type J thermocouple, with cold junction compensation]]
+
[https://docs.google.com/document/d/15OreBfdhb5mdpdXz6KMTVQt8ZWMU-4OV9i8Y6vp97Ms/edit?usp=sharing Construction Plan for the Tagger Microscope and Active Collimator]
  
−
==Completed Work==
+
[[Previous Construction Goals]]
  
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* Clean and organize room P405.
+
[[List of CAD Drawings]]
−
* Hot water tank constructed - still awaiting testing
 
−
* Splicing unit collars redesigned
 
−
* A program was written to automatically control a heater/pump based on the temperature of the water.
 
  
−
=Miscellaneous Fiber Testing=
+
[[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.
  
−
== Alcohol Test ==
+
===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.
  
−
Poly(methyl methacrylate), or plexiglass, was found to react to ethanol when used in high concentrations.  When our fiber bending tank (made of poly) was being cleaned with pure ethanol, an obvious reaction was seen as crazing developed on the surface of the walls of the tank.  Because our fibers are made from a similar material (polystyrene with flour-acrylic cladding) it seemed necessary to also test their reaction to exposure to alcohol. 
+
[[Thermistor Construction Journal]]
  
−
Two different alcohols, ethanol and propanol, were measured out and mixed with tap water to create different concentrations.  In the first 5 vials were concentrations of ethanol, the next five were concentrations of propanol, and in the last vial was tap water only.  The fibers destined for the vials were cut, measured cross-sectionally and lengthwise, and weighed with a milligram scale.  Both scintillating fibers and lightguides were tested. 
+
===Filling Tank / Filling PVC / Water Quality Information===
  
−
One lightguide and one scifi were put into each vial, and the vials were left to sit in a dark climate controlled area for two weeks.  After the two week period, the fibers were drained, left to dry, and measured/weighed again.  The raw data, as well as the plotted results, can be seen by clicking on the link below. 
+
[[AMCImportant procedure to follow when filling the tank | Important procedure to follow when filling the tank]]
−
 
 
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[[Alcohol Test 1]]
 
−
 
 
−
As can be seen from the plots of the data the greatest change in the size of the fibers occurred when the fibers were soaked in 80% alcohol.  The most interesting thing, I think, to be learned here is that there seems to be a greater change in the fibers that were soaked in 80% alcohol as opposed to the ones soaked in 100% alcohol.  My guess is that there were impurities in the tap water that acted as catalysts in the reaction, but the reason could be any number of things.
 
−
 
 
−
== Strength Test ==
 
−
 
 
−
In order to test the transverse strength of the fused bonds created with the splicing unit, fibers were fused and then broken in order to test their strength.  The size of the fiber and the fused joints were measured and recorded as well as the mass that each fiber held on the fuse point before breaking. 
 
−
 
 
−
Below is are links to the Google Spreadsheets of the raw data and graphs.  It is interesting to note that, in the first test, the joints that expanded the most were also the joints that withstood the most transverse force.  This may have been because the fibers that did not fuse successfully were the fibers that did not melt all of the way, and consequently did not fill up any extra space that may have been in the glass ferrule. 
 
−
 
 
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The expanded joints in the second test did NOT turn out to be good indicators of bond strength as I had previously thought.
 
−
 
 
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[[Strength Test 1]] (Completed April 4, 2013)
 
−
 
 
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[[Strength Test 2]] (Completed April 12, 2013)
 
−
 
 
−
=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]]
 
−
 
 
−
=Lab Journals / Research Progress=
 
  
−
==Ann Marie's Lab Journal==
+
[[Water Tank Instructions and Diagrams]]
−
In the past I had kept my journal in a [https://docs.google.com/document/d/1RD-TAZcs7aZwPDGamwsVQ0dpsG6XR5rojtWvdvdy0kw/edit Google Document].
 
  
−
[[December 2012]]
+
[[AMCPictures | Pictures]]
  
−
[[January 2013]]
+
[[Water Quality Testing]]
  
−
[[February 2013]]
+
Machine Shop Priorities are located [https://docs.google.com/document/d/1cuyRrSL8Mys-pou9SrYp-X7JCkTfnyDlzEaayu2f7Vg/edit?usp=sharing| here]
  
−
==Jonathan Kulakofsky's Lab Journal / Research Progress==
+
===Past Bundle Production Documents===
 +
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dFVyZVp0M1VQNnNuYUJfZ2d6NHdYY1E&usp=sharing Bundle Production Progress]
  
−
[[January, 2013]]
+
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dEpSYjluMGZ0R24xdFNUYVc2emczX2c&usp=sharing Rough Cut Travelers]
  
−
[[February, 2013]]
+
[https://docs.google.com/spreadsheet/ccc?key=0Au8hObtMJhV3dG9YTDduLVRuc01lRWxtYVA1UE0yWmc&usp=sharing Fusing Statistics]
  
−
[[March, 2013]]
+
[https://docs.google.com/document/d/1LQD5f2govyEr8BVe1Ef-K0yX9ATXbi9DUd3kaDsT1Qs/edit?usp=sharing Fiber Heating Data (Straightening and Bending)]
  
−
[[April, 2013]]
+
= Formatting Examples =
 +
[[Wiki Formatting Examples]]
  
−
==Liana Hotte's Lab Journal / Research Progress==
+
=Lab Maps=
  
 +
[[Map of Lab 403]]
  
−
{| class="wikitable" style="text-align:center; width:300px; height:50px;" border="1"
+
[[Map of Lab 405]]
−
|-
+
[Out of date as of 6/19/17]
−
| [[Jan 2013]]|| [[Feb 2013]] || [[Mar 2013]] || [[Apr 2013]]||
 
−
|-
 
−
| [[May 2013]] || [[June 2013]] || [[July 2013]] || [[Aug 2013]]||
 
−
|}
 

Latest revision as of 14:35, 5 January 2018

Current Work

Summer 2017

This summer, I (Micah Warren) am constructing seven new bundles to replace old ones in the tagger microscope. The following pages provide documentation:

Rough Cut Documentation Summer 2017

Pockmark Documentation Summer 2017

2015 and Earlier

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 Fibers - 2015 Google Spreadsheet.

Procedures for Tagger Microscope Construction

Here is a master document which describes the procedures: Construction Plan for the Tagger Microscope

Fiber Rough Cut Procedure

Fiber Numbering Procedure

Fiber Measuring Procedure

Fiber Bundling Procedure

End Milling Procedure Discontinued Summer 2017

Fiber Polishing Procedure

Fiber Fusing Procedure

Hot Air Bending Procedure

Fiber Testing Procedure

Hot Water Straightening Light Guides Procedure Discontinued Jan 2015

Fiber Water Stain Cleaning Procedure Discontinued Summer 2014

Hot Water Fiber Bending Procedure Discontinued Jan 2015

Fiber Painting Procedure Discontinued May 2014

Fiber Gluing Procedure Discontinued Spring 2014

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


Fiber Statistics

Fiber Dimension Statistics


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 here.

Hot Air Bending Box

After our experience with with heating fibers in water for straightening and bending, we decided to change our procedure and use hot air instead of water. The following pages show information about the heating box and the program used to run it.

Fiber Heating Box
Temperature Control Program

Intermediate Storage Box

Intermediate Storage Box

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.

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

Important procedure to follow when filling the tank

Water Tank Instructions and Diagrams

Pictures

Water Quality Testing

Machine Shop Priorities are located here

Past Bundle Production Documents

Bundle Production Progress

Rough Cut Travelers

Fusing Statistics

Fiber Heating Data (Straightening and Bending)

Formatting Examples

Wiki Formatting Examples

Lab Maps

Map of Lab 403

Map of Lab 405 [Out of date as of 6/19/17]

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