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Active Collimator Installation Pictures (view source)
Revision as of 15:31, 24 October 2014
, 15:31, 24 October 2014→Monitoring screens
===Pictures===
===Pictures===
Below are pictures of the assembling process
Below are pictures of the assembling process
<gallery perrow=6>
<gallery perrow=4>
image:collimator_machined_screw.jpg|A machined screw for the RF connector.
image:collimator_machined_screw.jpg|A machined screw for the RF connector.
image:active_collimator_01.jpg|The back of the active collimator with only 4 installed wedges.
image:active_collimator_01.jpg|The back of the active collimator with only 4 installed wedges.
The active collimator has been installed in the collimator cave in Hall D. A shielding box was constructed out of plexi and placed above the active collimator.
The active collimator has been installed in the collimator cave in Hall D. A shielding box was constructed out of plexi and placed above the active collimator.
<gallery perrow=6>
<gallery perrow=4>
image:ActColOnMount.jpg|Active collimator preamps mounted and cabled inside of the plexi shielding.
image:ActColOnMount.jpg|Active collimator preamps mounted and cabled inside of the plexi shielding.
image:ActColShielding.jpg|An overhead view of the active collimator preamps inside the shield box.
image:ActColShielding.jpg|An overhead view of the active collimator preamps inside the shield box.
==Initial noise measurements==
==Initial noise measurements==
Initial noise measurements were recorded by Trent Allison on October 6, 2014. Below is a gallery of the waveforms from each wedge at each gain.
Initial noise measurements were recorded by Trent Allison on October 6, 2014. Below is a gallery of the waveforms from each wedge at each gain.
<gallery perrow=4>
image:AC_gain_10e-06.JPG|Noise with gain of 10e-6
image:AC_gain_10e-07.JPG|Noise with gain of 10e-7
image:AC_gain_10e-08.JPG|Noise with gain of 10e-8
image:AC_gain_10e-09.JPG|Noise with gain of 10e-9
image:AC_gain_10e-10.JPG|Noise with gain of 10e-10
image:AC_gain_10e-11.JPG|Noise with gain of 10e-11
image:AC_gain_10e-12.JPG|Noise with gain of 10e-12
</gallery>
==Monitoring screens==
==Monitoring screens==
===Acronyms===
===Acronyms===
*EPICS - Experimental Physics and Industrial Control System
*EPICS - Experimental Physics and Industrial Control System
*IOC - Input Output Controller (software component)
*IOC - Input Output Controller (software component)
*PV - Process Variable in EPICS
*CSS - Control System Studio (application development environment)
*CSS - Control System Studio (application development environment)
*OPI file - Operator Interface file (application within CSS)
*OPI file - Operator Interface file (application within CSS)
*Monticello - the MEDM main display gui that pops up when medm is started
*Monticello - the MEDM main display gui that pops up when medm is started
*MEDM - Motif-based Editor and Display Manager (see here) used for graphical displays of active EPICS components by the accelerator, and accessed from the counting house by shift workers.
*MEDM - Motif-based Editor and Display Manager (see here) used for graphical displays of active EPICS components by the accelerator, and accessed from the counting house by shift workers.
=== Active Collimator Naming Convention ===
*For EPICS PVs
**N9 corresponds to inner wedges
**N10 corresponds to outer wedges
*For Monticello plots
**I corresponds to inner wedges
**O corresponds to outer wedges
*Common to both EPICS and Monticello
**XP corresponds to X, plus
**XM corresponds to X, minus
**YP corresponds to Y, plus
**YM corresponds to Y, minus
=== List of EPICS PVs ===
Here are the waveform records with size of '''8192''', N9 are inner and N10 are outer:
*'''Inner'''
**<code>iochdcol:BPM:N9:raw_XP</code>
**<code>iochdcol:BPM:N9:raw_XM</code>
**<code>iochdcol:BPM:N9:raw_YP</code>
**<code>iochdcol:BPM:N9:raw_YM</code>
*'''Outer'''
**<code>iochdcol:BPM:N10:raw_XP</code>
**<code>iochdcol:BPM:N10:raw_XM</code>
**<code>iochdcol:BPM:N10:raw_YP</code>
**<code>iochdcol:BPM:N10:raw_YM</code>
These are the 16-bit count readings for individual plates that are always available and filtered down to ~1Hz (same order as above):
*'''Inner'''
**<code>IOCHDCOL:VMICADC1_1</code>
**<code>IOCHDCOL:VMICADC2_1</code>
**<code>IOCHDCOL:VMICADC3_1</code>
**<code>IOCHDCOL:VMICADC4_1</code>
*'''Outer'''
**<code>IOCHDCOL:VMICADC1_2</code>
**<code>IOCHDCOL:VMICADC2_2</code>
**<code>IOCHDCOL:VMICADC3_2</code>
**<code>IOCHDCOL:VMICADC4_2</code>
And the gains:
*<code>IPMHDACI_GainSub</code>
*<code>IPMHDACI_GAINXP</code>
*<code>IPMHDACI_GAINXM</code>
*<code>IPMHDACI_GAINYP</code>
*<code>IPMHDACI_GAINYM</code>
*<code>IPMHDACO_GainSub</code>
*<code>IPMHDACO_GAINXP</code>
*<code>IPMHDACO_GAINXM</code>
*<code>IPMHDACO_GAINYP</code>
*<code>IPMHDACO_GAINYM</code>
===Viewing AC waveforms in Monticello===
===Viewing AC waveforms in Monticello===
===Accessing CSS AC GUI===
===Accessing CSS AC GUI===
*Connect to gluon05 in the Hall D counting house
*In the terminal window type the command <i>css_gluon05</i>
**This will open CSS as configured for gluon05. Only one profile instance can be run at a time
**css_gluon05 automatically opens the profile for gluon05 and includes the configurations required to view all of the Hall D GUIs
*If the tab “Main Action Bar” does not appear, do the following
**Click on Window->Open Perspective->Other
**Select CSS
**There should now be a button on the left labeled “CSS”. Click it and it will open the navigator
**Expand Hall-D and go to the very bottom and double-click “main_selection.opi”
*Once the main_selection.opi (has the name “Main Action Bar” on the tab) scroll down the the BEAM section and select Active Collimator. Click on it to open a new window
*This small GUI allows you to start/stop recording a ROOT file as well as a button to analyze the data. There is a window that shows where the ROOT file is being stored as well as the current size of the file and its size limit.
*To analyze the data, click the analyze button.
*The analyzer code can be found at ~hdops/acanalyzer
*When examining the root files, N9 are inner wedges, N10 are outer wedges.
==Analysis==
==Analysis==