Aggregator
COMMENT ON Work requiring returning MMA1H01 to operation
COMMENT ON Replace ARC 7 SLM
QuickPic - Arc5 tripped on magnet overtemp. DCP investigating.
The OPS DRVHs for the following cavities have been updated: 2L10-4
The OPS DRVHs for the following cavities have been updated:
2L10-4
Username: kerns
Date/Time: 07-14-26_13:30:52
RF Status: Bad
Tuner Status: Good
Comment: DRVH=3.000 2.5 w amp dying and needs replaced.
Previous OPS DRVH: 4
Special Instructions:
iocsl22rffcc1 restored
2L10-7 Tuner Card Replacement
Blew the tuner 5A fuse and tuner OTMP blowing 5a tuner fuse when trying to tune with tune cart. Freq at 1497.0079 Mhz and not tuning as monitored on tune cart after I replaced the Camac stepper motor card and RFCM for bad tuning. SRF will have to check tuner motor at the cavity next available chance since tuner motor is over heating and blowing fuses. We can check it after they look at it and make repairs. Since it is partially tuned and we can't detune it yet, I recommend no changes to the gradient or anything on this cavity. Optimized the cavity
The OPS DRVHs for the following cavities have been updated: 2L10-7
The OPS DRVHs for the following cavities have been updated:
2L10-7
Username: kerns
Date/Time: 07-14-26_13:27:02
RF Status: Good
Tuner Status: Bad
Comment: DRVH=7.000 Optimized GMES at 7.0 Mv/m until cavity tune is repaired or cavity can be detuned.
Previous OPS DRVH: 8.2
Special Instructions: Cavity Tuner inop. Leave tuner in Manual and do not change gradient until repairs made.
The following cavity histories have been updated: 2L10-7
The following cavity histories have been updated:
2L10-7
Username: kerns
Date/Time: 07-14-26_13:25:38
RF Status: Good
Tuner Status: Bad
Comment: No cavity tuning after new Camac Stepper Motor card and RFCM. Tune cart is showing no movement from 1497. 0079 Mhz. High. Needs SRF to check tuner motor operation downstairs
Special Instructions: Cavity Tuner inop. Leave tuner in Manual and do not change gradient until repairs made.
Maintenance Tag:
COMMENT ON Harp System Maintenance 2026
HD Collimator Cave Unlocked
This entry is to communicate the Hall D collimator cave has been unlocked to allow for maintenance on the active collimator. The crew chief has been notified and the cave will be verified free of personnel, locked and re-posted as a radiation area once work is complete. The crew chief will also be notified.
COMMENT ON Harp System Maintenance 2026
The following cavity histories have been updated: 2L10-4
The following cavity histories have been updated:
2L10-4
Username: kerns
Date/Time: 07-14-26_13:11:26
RF Status: Bad
Tuner Status: Good
Comment: 2.5 w amp needs to be replaced for low drive after RFCM out measured good at -8.4db.
Special Instructions:
Maintenance Tag: Component: 2.5W Amp
2L10-4 2.5w amp dying
Barely enough CRFP to maintain 3 Mv/m where it had been running 4Mv/m. Measured RFCM upconvertor output at -8.47 db which it great. RATN at 0db and GASK is at 3.7 v, previously at 4.27v at 4Mv/m. Noting that it needs a 2.5W amp in cavity history after spares recovered today.










