Aggregator

Log Number: 4517532Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

fairly smooth running at 50uA. xC staff requested beam off for a short time to change SHMS momentum, then returned at 45uA.

Log Number: 4517528Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4517526Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4517514Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

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.

Log Number: 4517513Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4517509Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4517507Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: 10cm DummyPass: 3Note: Calibrated On:2026-Jun-15 07:14Calibrated By: samariFile:C-2026-06-15_0714_10cm_Dummy_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton2,500</td

Log Number: 4517506Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4517505Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4517486Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

Hall C was changing their HMS and SHMS momenta during the preceding hour. Momentum and target changes are complete and beam is back on Loop 2 at 70 uA.

Log Number: 4517484Logbook(s): 

• HCLOG
• ELOG

Entry Makers: alexsBody: 

Log Number: 4517482Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17289Title:
Hall C Spectrometer Momentum Change

Summary:
Hall is changing their spectrometer momentum in HMS and SHMS (HMS: -1.165->+1.165 GeV, SHMS:+2.738->+4.929 GeV).

Log Number: 4517478Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17289Title:
Hall C Spectrometer Momentum Change

Summary:
Hall is changing their spectrometer momentum in HMS and SHMS (HMS: -1.165->+1.165 GeV, SHMS:+2.738->+4.929 GeV).

Log Number: 4517473Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

more smooth running. xC is changing to Loop 2 and planning to run at 70uA.

Log Number: 4517472Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: Loop 2 10cmPass: 3Note: Calibrated On:2026-Jun-15 04:06Calibrated By: samariFile:C-2026-06-15_0406_Loop_2_10cm_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton2,000</

Log Number: 4517471Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4517470Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4517452Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

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.

Log Number: 4517450Logbook(s): 

• ELOG
• RFLOG

Entry Makers: alexsBody: 

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.

Log Number: 4517447Logbook(s): 

• ELOG
• RFLOG

Entry Makers: alexsBody: 

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.