Difference between revisions of "Short Term Run Plan"
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* Don't forget to set a new reference in the CBREM GUI each time the amorphous radiator is used. | * Don't forget to set a new reference in the CBREM GUI each time the amorphous radiator is used. | ||
* Be sure to hit the "PARA" or "PERP" button in CBREM GUI when switching diamond targets. Otherwise the diamond alignment may be in an undefined state and the experiment may be flooded with low-energy photons. | * Be sure to hit the "PARA" or "PERP" button in CBREM GUI when switching diamond targets. Otherwise the diamond alignment may be in an undefined state and the experiment may be flooded with low-energy photons. | ||
| − | * Watch for | + | * Watch for locked-up FCAL HV bases towards the end of a run and clear them before starting a new run. See [https://halldweb.jlab.org/hdops/wiki/index.php/Forward_Calorimeter_Shift#FCAL_High_Voltage_channel_with_yellow_border]. |
* Watch the DAQ lifetime when starting a run. Sometimes it stays at 0%. Stopping and restarting the run fixes this issue in most cases. | * Watch the DAQ lifetime when starting a run. Sometimes it stays at 0%. Stopping and restarting the run fixes this issue in most cases. | ||
Revision as of 12:14, 7 May 2025
Last updated - see smallprint at the bottom of the page
Contents
Run Plan
Production running cycling through targets:
- JD80-212 80um diamond, 200 nA beam current
- 800M events for 0/90 deg and PARA setting
- 800M events for 0/90 deg and PERP setting
- 800M events for 45/135 deg and PARA setting
- 800M events for 45/135 deg and PERP setting
- 400M events with 4.5×10-4 Al 40um radiator (on goniometer!), 300 nA beam current
- Set new reference for amorphous radiator in CBREM GUI.
- Runs no longer than 2 hours.
- Keep state of production cycle on whiteboard up-to-date.
Special instructions
- Put comments for each run.
- Format: "<radiator> <PARA/PERP>, <beam current>, LH2 target, <typical trigger rate>, <typical life time>, <any additional information>"
- Example: "JD80-212 80um 45/135 PARA, 200nA, LH2 target, 81kHz, 93% live time, production"
- Don't forget to set a new reference in the CBREM GUI each time the amorphous radiator is used.
- Be sure to hit the "PARA" or "PERP" button in CBREM GUI when switching diamond targets. Otherwise the diamond alignment may be in an undefined state and the experiment may be flooded with low-energy photons.
- Watch for locked-up FCAL HV bases towards the end of a run and clear them before starting a new run. See [1].
- Watch the DAQ lifetime when starting a run. Sometimes it stays at 0%. Stopping and restarting the run fixes this issue in most cases.
Medium Term (1 week)
- No special plans.
Run conditions
- Radiator: 4.5 E-4 Al (amo, on the goniometer)
- Collimator: 5.0 mm
- TPOL converter: Be 75 um
- Runs are no more than 2 hours - see whiteboard for the production cycle
- Target: Liquid Hydrogen
- DAQ configuration - see whiteboard
Current Experiment
GlueX II (with DIRC) & JEF and Alpha
- In the BTM this is "GlueX 2 / JEF"
- E12-12-002 GlueX II Proposal
- E12-10-011 JEF proposal
- E12-12-002a Alpha Proposal
