Run Planning Meeting Notes, October 20 - October 26, 2022
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Hall D counting room white board
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Contents
Thursday, October 21
Past 24 hours
- Continued taking data at 200nA with EMPTY Target Cell till ~14:00, collected ~0.65B events, overall collected data for past period 1.533B events
- 15:00 Beam was OFF for ~2.5 hours for Injector Restoration
- At 16:10 started filling the target with LHe
- ~17:40 Beam was back, started collecting data with 200nA and FULL target
- 17:58 FDC:hv:2:c3:3n channel HV tripped, tried to turn it ON, with different ways, but continuously it was tripping, contacted to Lubomir he changed the HV from 500V to 400V https://logbooks.jlab.org/entry/4064442
- 19:20 Target alarm comes ON, the Pulse Tube Refrigerator(PTR) was switched off resulting in increase of the target cell temperatures from 4.27 to about 4.6 K
- Same Target Issue happened at 20:50 again, switched back ON the PTR, and in both cases contacted to Chris Carlin, he will keep an eye on it
- 22:10 asked for Rapid Access to let Chris Carlin take a look on the heater/cooler control box
Shift Summary
- Day Oct-20
- Swing Oct-20
- Owl Oct20/21
- [Early Riser Oct-21]
Issues
- https://logbooks.jlab.org/entry/4064442
- https://logbooks.jlab.org/entry/4064492
- https://logbooks.jlab.org/entry/4064536
Plan
Continue running on the FULL LHe target at 200nA
Wednesday, October 20
Past 24 hours
- Beam was Off most of the day starting from ~7:30am for "ARW Tour and Associated Maintenance" and VCG1L1210(SRF Insulating Vacuum)
- During dawn time Mark and Malte replaced some Fcal bases (2?)
- Vlad and Arshak did some alignment on the prototype
- Kondo conducted some work on GEM-TRD
- Restored Beam to the Hall-D at ~22:30, after 15 hours of downtime
- After Beam restoration Harp Scan was performed and started run on the Empty LHe4 Cell target with 200nA
- Collected for about 0.3B events
- At 7:45 meeting informed MCC about beam position instability
Shift Summary
Issues
Plan
Continue running on the Empty target at 200nA
