View source for XEM: Notable Events and Changes

=== October 19, 2022 ===
* BCM 3H05 (Unser girder) temperature out of control (https://logbooks.jlab.org/entry/4063487)
** Temperature controller was replaced - no data taken with bad temperature I think
** Later, observed occasional temperature excursions up to 113. Not sure if this is a problem. 
*** Shuji discovered this is completely correlated with target motion!

=== October 14-15, 2022 ===
* HMS DAQ rebuilt
** DAQ went down hard - Bob had to rebuild
** A couple log entries https://logbooks.jlab.org/entry/4059000, https://logbooks.jlab.org/entry/4059166

=== October 15, 2022 ===
* SHMS trigger changes
** ELLO = 3/4 AND Cherenkov (was 3/4 AND Cherenkov AND PRLO)
** ELHI = 3/4 AND PRLO (was 3/4 AND PRHI)

=== 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 (https://logbooks.jlab.org/entry/4053299):
** 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 4, 2022 ===
* SHMS/HMS threshold adjustments (https://logbooks.jlab.org/entry/4050809, https://logbooks.jlab.org/entry/4050908)
** HMS
*** HGCER: Changed from -9.8 mV to -14.7 mV
*** No changes to PRLO, PRHI, or SHLO
** SHMS
*** No changes to PRLO, PRHI at this time (changed later)
** Set NGCER to -15.2 mV
* Reverted SHMS NGV PMT1 HV change (changed back from 1700 to 1835) - this was done after 17259 (https://logbooks.jlab.org/entry/4051044)

=== 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