Difference between revisions of "December 2, 2015 Calibration"
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#* '''CDC''' - Constants to correct for wire sag have been added to the CCDB. Mike is still checking his new drift time constants before adding these to CCDB/sim-recon. He has derived these from beam data, so the calibration codes can be incorporated to the calibration challenge. | #* '''CDC''' - Constants to correct for wire sag have been added to the CCDB. Mike is still checking his new drift time constants before adding these to CCDB/sim-recon. He has derived these from beam data, so the calibration codes can be incorporated to the calibration challenge. | ||
#* '''FDC''' - Simon mentioned that Lubomir has found improvement in strip/wire resolutions by improving the fitting procedure. Simon is still working on incorporating this code into sim-recon tracking. He thinks this work can be done by the Feb. 2016 run. | #* '''FDC''' - Simon mentioned that Lubomir has found improvement in strip/wire resolutions by improving the fitting procedure. Simon is still working on incorporating this code into sim-recon tracking. He thinks this work can be done by the Feb. 2016 run. | ||
− | #* '''TOF''' - | + | #* '''TOF''' - Beni wrote some code to perform a fine-tuning on the time offsets between different TDC channels on the same chip. This involves looking at the least-significant bits of the times, and takes several thousands of hits - this is slow with cosmic data. Currently his code is doing a brute-force calibration of the different parameters - there is a most sophisticated algorithm which is supposed to work, but he wasn't able to get it to work yet. |
#* '''Start Counter''' - Mahmoud is in the process of converting the propogation time corrections to work in the calibration challenge framework. | #* '''Start Counter''' - Mahmoud is in the process of converting the propogation time corrections to work in the calibration challenge framework. | ||
#* '''TAGH''' - Nathan cleaned up his timewalk calibration code and added it to sim-recon. He is doing some final checks to see if there are any lingering time offset issues before committing the new constants. | #* '''TAGH''' - Nathan cleaned up his timewalk calibration code and added it to sim-recon. He is doing some final checks to see if there are any lingering time offset issues before committing the new constants. |
Revision as of 14:58, 2 December 2015
GlueX Calibration Meeting
Wednesday, December 2, 2015
11:00 am, EST
JLab: CEBAF Center, F326
Contents
Communication Information
Remote Connection
You can connect using BlueJeans using the meeting number 630 804 895 . (Click "Expand" to the right for more details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 630804895
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via iOS or Android App:
- Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: 1 888 240 2560 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
- Use *4 to unmute
Slides
Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2015
on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2015/ .
Calibration Tasks
- Summary of Detector Performance
- Update hit/reconstructed object variances in sim-recon
- Add plugins to sim-recon/src/plugins/Calibration
- Document calibration procedures
- Calibration Challenge
- Update Calibration Data Taking estimates
Agenda
- Announcements
- Calibration Tasks
- Calibration Challenge update:
- Current status: jobs run through pass 2 (of 3)
- New additions: BCAL gains, PS timing, PSC timewalks, SC timewalks, TAGH timewalks
- Upcoming: TAGM timewalk, FCAL gains & pedestals, PS energy calibration
- Documentation: RF Calibration, PSC TW Calibration
- More validation needed
- Calibration Challenge update:
- Subdetector Reports
- Future Simulations
- Future Run Numbers & Magnetic Fields
- AOB
Minutes
Attending: Sean (NU); Simon, Beni, Mark I., Adesh, Alex B., Nathan, Justin (JLab); Curtis, Mike S., WIll M., Naomi (CMU); Mahmoud (FIU)
- Announcements
- Beam is expected to be delivered to Hall D next week.
- Calibration Tasks
- Calibration Challenge update:
- Current status: jobs run through pass 2 (of 3)
- New additions: BCAL gains, PS timing, PSC timewalks, SC timewalks, TAGH timewalks
- Upcoming: TAGM timewalk, FCAL gains & pedestals, PS energy calibration
- Documentation: RF Calibration, PSC TW Calibration
- More validation needed
- Calibration Challenge update:
- Subdetector Reports
- FCAL - Adesh has put in updated pedestals (same values for mode 7+8 data) and gains (different for mode 7,8) for Spring 2015 data. The difference between the gains for mode 7 and 8 data is understood to be due to a mismatch between the algorithm used by the firmware in mode 7 and the emulation in sim-recon for mode 8. Addressing this difference requires the major rewrite of the emulation code that is in progress. Adesh tried modifying the configuration of the emulation in a private version of sim-recon, but did not find an improvement in the resolution, so the larger FCAL resolution is still not understood. The hardware gain balancing has been done, default software gains of 1 will be uploaded to the CCDB for the current run period.
- BCAL - No news.
- CDC - Constants to correct for wire sag have been added to the CCDB. Mike is still checking his new drift time constants before adding these to CCDB/sim-recon. He has derived these from beam data, so the calibration codes can be incorporated to the calibration challenge.
- FDC - Simon mentioned that Lubomir has found improvement in strip/wire resolutions by improving the fitting procedure. Simon is still working on incorporating this code into sim-recon tracking. He thinks this work can be done by the Feb. 2016 run.
- TOF - Beni wrote some code to perform a fine-tuning on the time offsets between different TDC channels on the same chip. This involves looking at the least-significant bits of the times, and takes several thousands of hits - this is slow with cosmic data. Currently his code is doing a brute-force calibration of the different parameters - there is a most sophisticated algorithm which is supposed to work, but he wasn't able to get it to work yet.
- Start Counter - Mahmoud is in the process of converting the propogation time corrections to work in the calibration challenge framework.
- TAGH - Nathan cleaned up his timewalk calibration code and added it to sim-recon. He is doing some final checks to see if there are any lingering time offset issues before committing the new constants.
- TAGM - Alex is finishing off his PS energy calibration code, and testing it with Nathan's PS time calibration code. He is running some final checks before adding in his code.
- Future Simulations
- Future Run Numbers & Magnetic Fields
- AOB