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
Minutes
Attending: Sean (CMU); Naomi, Curtis (CMU); Matt S., John Z. (IU); Simon, Lubomir, Beni, Mark I., Mark D., Eugene (JLab); Zisis, Tegan (Regina); Justin (MIT)
Announcements
Curtis mentioned that in the latest meetings with the accelerator group, it sounds like there will be the possibility of taking additional data on evenings and weekends in November and December, beyond the 3 weeks we have been planning for. Therefore, we should be planning to make as many calibrations as possible with the available data.
CDC
- Fall 2014 Commissioning Simulations
- Status Update