Aggregator
iocsofthrtbt restored
Follow-up Re: Laser Table Work: Measure transition properties 1920 Hz
Operator SIGN IN
Operator SIGN IN
Vacuum Group Summary 2026-03-04
VBV1L11A - valve body replaced, no more hissing
2L03
- Air solenoid plates installed, working
- Solenoid cables rerouted, plugged in, verified working (I&C)
- Pumped on 1.33" CF right angle valve, pinched off - still reading higher VIP2L03A pressures
2L25
- Air solenoid plates installed, working
- Solenoid cables rerouted, plugged in, verified working (I&C)
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 03-04-26
Time : 15:35:10
Day : Wednesday
Shift : Swing
Crew Chief : Forman
Program Deputy: Schoene
Team : F
Arm : RADCON
Designated SSO: Schaumloffel
LERF Operator:
Operators : Schaumloffel, Thomas
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
LCWWatchdog Alarm
COMMENT ON Investigate Magnet and Trim Rack Problems NL27B20 MBC7S00H Ch 30
Follow-up Re: Laser Table Work: Polarization Measurements
COMMENT ON Disconnect Magnet SL19B09 MQB2L15
COMPLETED Disconnect Magnet SL19B09 MQB2L15
Survey and Alignment work summary
COMMENT ON Removal and Installation of Girders 2L03A & 2L04A
Improved mu-metal in 0L region
I used today's MD to improve mu-metal wraps in the 0L region between the booster and cryomodule. Mu-metal is there to reduce the earth's field by factor of 2-3 times over a long span where the beam energy is low. Still, bet if it's applied uniformly and concentrically with the beampipe. This is b/c the Earth's field doesn't disappear, it's just rerouted (div.B=0).
I doubt anyone will notice, but if a tiny bit of steering is required, this could be the reason.
COMMENT ON Investigate and Troubleshoot YBBS06 ARC7 Shunt failure
ARC7 was locked out for work done under PTW-10105. Visual inspection of the magnet and shunt leads was performed and confirmed correct. Inside the shunt chassis, the cabling coincided with the connections checked downstairs. The shunt chassis for ARC7 was still the prime suspect and has been replaced. Channel addresses for the shunt channels and chassis jumpers have been changed and verified with the old chassis. Once the chassis was changed, the shunt chassis interlocks were again checked with the box supply under control power.










