August 27, 2014 Calibration
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GlueX Calibration Meeting
Wednesday, August 27, 2014
11:00 am, EDT
JLab: CEBAF Center, F326
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Agenda
- Announcements
- Commissioning Planning
- Hall D Commissioning
- CDC
- FDC
- FCAL
- BCAL: DocDB documents 2361 and 2379 need updating together with Wiki info, and experience from this summer's cosmics and LED running, and MC simulations
- TOF
- Start Counter
- Trigger
- Fall 2014 Commissioning Simulations
- Status Update
- Commissioning target geometry in branch hdds-commissioning
- Status Update
- Number of Events & Final States
- EM Background Simulations (Sean)
- EM Background Simulations (Simon)
- Mockup of Level 1 trigger:
- Version A: (Ebcal + 4.0 Efcal)>=2.0 && Ebcal>0.200 && Efcal>0.030
- Version B: (Ebcal + 4.0 Efcal)>=2.0 && Ebcal>0.030 && Efcal>0.030 && N(start counter hits)>0
- Version C: Efcal>=0.250
- Version D: Efcal>=0.250 && N(TOF hits)>0
- Coherent bremsstrahlung generator: 10 GeV electron beam, 5 mm collimator, Emin=1.2 MeV.
- Mockup of Level 1 trigger:
Events | Trigger | Events with segments
| A B C D | A B C D
97172 | 169 70 44 44 | 122 67 29 29
Fraction: | 0.0017 0.0007 0.0005 0.0005 | 0.0013 0.0007 0.0003 0.0003
- Action Items
- AOT
Action Items
- Update desired event counts (all)
- Tag new sim-recon version (Mark I.)
- Update geometry for commissioning running (Simon)
- Obtain new constants for EM background simulation & magnetic field (Sean)
- Update expected photoproduction event rate calculations
- Decide number of events & conditions to simulate
- Run simulations
- What is the lowest solenoid current that we can run at? How will a low solenoid current affect FDC alignment?
- Study FCAL & BCAL trigger thresholds