Sep 10, 2015 Calorimetry

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Meeting Time: 11 a.m.

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Participant Direct Lines

• JLab Phone: in CC F326 is 757-269-6460 (usual room)
• JLab Phone in CC L207 is 757-269-7084
• Phone in the Regina Video-conference Suite is 306-585-4204
• Athens Phone: in Christina's office is 011-30-210-727-6947

Action Items

1. Consider developing data structures for the peak value (Mike and Mark)
2. Provide information to Curtis' document on performance for FCAL (Matt)
3. Summarize information on eta peak (Will) [2]
4. Produce plot of z-position resolution (George).

References

1. FCAL HDFCAL log book
2. BCAL HDBCAL log book
3. BCAL Action Items and Working Tasks

Tentative Agenda

1. Announcements
2. Action Items
3. GlueX Collaboration Meeting October 8-10
4. GlueX Performance document: BCAL & FCAL high-level plots GlueX-doc-2775
5. Run preparations
   • Solenoid cooldown and ramp up mid August
6. FCAL Update
7. BCAL Update
8. Calorimetry F250 Firmware Discussions
9. Reconstruction and Simulation
   1. Eta reconstruction (Tegan)
10. Calibration
11. Any other business

Minutes

Attendees: Simon, David, Mark (JLab), Sean (NWU), Christine (Athens), Curtis, Will M. (CMU), Tegan, Ahmed, Zisis (Regina)"

1. Announcements: magnet cooldown in December; so no magnet but could have beam without magnet. We will discuss this at the Collaboration Meeting.
2. Action Items
   1. Consider developing data structures for the peak value (Mike and Mark): nothing to report; discuss with Mike next week. No great hurry.
   2. Provide information to Curtis' document on performance for FCAL (Matt): Matt sent stuff to Curtis. Now working on online an beamline.
   3. Summarize information on eta peak (Will) [3]: also for Curtis' document, see two plots on link. Exclusive eta production off the proton: 30 MeV width after first pass and with no kinematic fit. Curtis suggested putting it on the Plots tab on the Portal.
   4. Produce plot of z-position resolution (George): nothing to report.
3. GlueX Collaboration Meeting October 8-10: standard 2 talks for Calorimeters; get them in soon.
4. GlueX Performance document: BCAL & FCAL high-level plots GlueX-doc-2775
5. Run preparations
   • Solenoid cooldown and ramp up mid August
6. FCAL Update
7. BCAL Update
8. Calorimetry F250 Firmware Discussions: Sasha is leading the process of the new design of the firmware plus fix bug Mike found in a patch for the next time we run. Firmware should be ready for spring. Sasha is talking to Hai who will do most of this work. Testing time is needed to. This may mean that we do not need any interim patch.
9. Reconstruction and Simulation:
   1. Andrei: work on improving calibration is ongoing; some irregularities observed; will discuss the issue offline with Mark and Elton.
   2. Mark: gain ratio extractions from most recent run over the data had problems (50% of runs were done). The full replay will happen over the coming rate. Results available soon.
   3. Simon: track matching to Calorimeters. For charged particles sometimes the closest distance to all the hits in the shower and reduces the time of a fake hit in the calorimeter. Some showers did not have a symmetric shape. Matches to individual hits was working better and mostly for the BCAL. The issue was not getting enough good matches to tracks. Order of showers (by energy) should not matter since we are matching too few. Fix is checked in.
   4. Will M: single ended hits not checked in yet; needs to fix a bug first. Final tests are underway before checking it in before the next BCAL meeting.
   5. Eta reconstruction (Tegan): learning how to use the DReaction and cuts.
10. Calibration: nobody from the BCAL at the meeting. How much more data does the BCAL need for a full calibration. Rough factor of 100x suggested by Mark. Put on Action Item.
11. Any other business