Aggregator
"xC resumes beam at 45uA"
"xC BNR for kinematics change"
Machine Update
Somewhat smooth beam continues to Hall C. At 70 uA, trip rate is higher due to dump diffuser trips, but due to the excessively esoteric design of the system and insufficient documentation we were unable to figure out how to effectively adjust the trip levels before current went back down to 50 uA and the problem became a moot point.
QuickPic - xC target to 10cm Dummy at 50uA
AutoLog - UNMasking Hall C Normal Target
iCalibrate: Hall C
"xC BNR for target change"
AutoLog - Masking Hall C Normal Target
Machine status
QuickPic - Hall C Target to Loop 2 @ 70 uA
Downtime Incident CLOSED: Hall C Spectrometer Momentum Change
Downtime Incident CREATED: Hall C Spectrometer Momentum Change
machine status
iCalibrate: Hall C
AutoLog - Masking Hall C Normal Target
AutoLog - Masking Hall C Normal Target
machine status
slightly less smooth running. xC asked for a target change, so we took the opportunity to reLEM because there was no more headroom in 1L19. we seem to be getting the energy back as the 1L12 MO temperature recovers. xC is now at 50uA on 10cm dummy. a few more RF trips at higher current.
Late entry: contacted RF on-call about 1L12 MO temperature
Contacted RF on-call per alarm response guidance. Informed them it was not affecting beam, but that it coincided with a slow loss of energy in the machine. We were advised that it can likely wait until the next maintenance day to address, but to continue to monitor the energy in 1L19 and call back if the energy loss persists.
Exposed MO Line at 1L11
While investigating the 1L12 MO temperature regulation alarm, found the MO distribution behind 1L11 has no insulation and the line protection barrier had been moved. Just to make sure this zone wasn't contributing to the energy loss in the north linac, crested the zone gang phase and found it shifted 7 degrees. Drive line temperature readbacks for the zone have been stable, at least.










