Aggregator
COMMENT ON LNS Installation in W202B04
COMMENT ON B.67 Install Leak Detector Box and Power
COMMENT ON B85 Perform 5 year PM
Follow-up Re: gun bake update
COMMENT ON Plasma processing during the Fall 2026 SAM
See ATLis: https://tasklists.jlab.org/atlis/tasks/121236
The emergency power loop will not be affected by panel PMs in the NLSB this week.
APPROVED Perform HCO of Injector 10 Amp Trim Racks
COMMENT ON Re-Connect Injector Beamline Magnets and Verify Function
COMMENT ON Re-Connect Injector Beamline Magnets and Verify Function
COMMENT ON Replace gun HV electrode
Yesterday: Bake taken down, moved mirror puck into HV chamber for retroreflection and HV conditioning. Tightened gun valve bonnet seal which appears to have mitigated a tiny leak that opened there during the bake.
Today: Prep chamber RGA filament burned out. Gun valve actuated several times, functioning properly, ready for next step of laser retro-reflection check.
The work covered under this atlis is nearly complete.
COMMENT ON Plasma processing during the Fall 2026 SAM
To reiterate plans. We should be done processing by early afternoon and will be closing the valve connected to the pump VIP1L08A before we go home. We will be leaving the cryomodule open to the plasma turbo cart to pump overnight. Tomorrow we will turn on the ion pumps and close the valve on VIP1L07B which between the plasma turbo pump and the beam line.
After we are done with that Frank will use the plasma turbo cart to regenerate the getter pump on VIP1L07B.
gun bake update
Prep chamber RGA does not work independ of the electronics unit used. Yesterday it was able to run a bit with the faraday cup but the pressure is low enough it could have just been noise.
Spent some time diagnosing problem: The filament is burned out. This warning has been coming up intermittently but now happens every time. I checked the filament resistance with an ohmmeter (verified with RGA manual that I had the right pins) and the filament is open. This RGA is no longer functioning and will need to be replaced another time.
COMPLETED B36 HVAC Bollard Installation
COMMENT ON SAM 2026 Box Supply Work Preventative Maintenance/interlock checks
Working under PTW-11615. Preventive maintenance for all south access box supplies is complete. We will move to the BSY box supplies once the power supply flushing is done. Work will start after a pre-job brief is done for PTW - 11618.
-O'Brien, Banks, Crespo
iocbcm restored
COMMENT ON B85 Perform 5 year PM
Power for the CABAF ODH system rack MC02B01 will be affected by this work.
Rack MC02B01 is powered from distribution panel MC-P, CB11 via local UPS. In addition, this UPS provides backup power for rack MC02B03.
Either the ODH system has to be powered from alternative power source or tunnel area in the Injector, North Linac and South Linac has to be posted ODH-2 for the duration of this maintenance.










