Difference between revisions of "XEM: Notable Events and Changes"
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=== October 3, 2022 === | === October 3, 2022 === | ||
| − | * SHMS NGC PMT1, HV changed from 1835 V to 1700 V | + | * SHMS NGC PMT1, HV changed from 1835 V to 1700 V (https://logbooks.jlab.org/entry/4050329) |
** SHMS Run 17238 has this new HV | ** SHMS Run 17238 has this new HV | ||
Revision as of 07:55, 11 October 2022
October 10, 2022
- SHMS 2Y- scalers restored during the middle of SHMS run 17336 - those scalers were missing for all runs before this
- Noticed spurious signal in SHMS 2Y21- - it turned out to be RF signal plugged into FADC, and map fiule wasn't updated. Commented this out in the map file - does not impact data. Could impact (maybe?) data analyzed before map file change
October 9, 2022
- SHMS PID thresholds set - just before SHMS run 17318:
- NGC: -12.7 mV
- PRLO: -35.4 mV
- PRHI: -44.2 mV
October 8, 2022
- SHMS NGC PMT1 HV changed back to 1700 V
October 7, 2022
- Moved SHMS sPre14- HV cable to new channel. No impact on data. (https://logbooks.jlab.org/entry/4052039)
- Sent HMS edtm pulse through discriminator to give constant with (50 ns) for all frequencies (https://logbooks.jlab.org/entry/4051873)
October 6, 2022
- SHMS PRLO and PRHI thresholds increased to -45.4 and -50.9 mV to get rid of huge "no beam rate."
- These thresholds were used for most of SHMS paddle study - affects runs starting with 17261
- Mark updated the trigger mapping for SHMS DAQ (see elog https://logbooks.jlab.org/entry/4051681)
- Would only have impacted data taken with elclean trigger - we had not taken any to this point, so not an issue
October 4 (day)-9 (swing), 2022
- No beam due to magnets connected to RSEP8 power supply - magnets were overheating due to inadequate LCW flow
October 3, 2022
- SHMS NGC PMT1, HV changed from 1835 V to 1700 V (https://logbooks.jlab.org/entry/4050329)
- SHMS Run 17238 has this new HV
