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Cryo Daily Work Summary
0L04 Dropping out of HV
iocsoftnl09rf restored
ODH Alarm; appears to be Hall B OM01
Vacuum Group Summary 2026-02-11
2L03
- Both C75 girders reconnected to beamline
- Pump down and leak check passed
- NEG activated on 2L03 girder
- NEG activation scheduled for tomorrow for 2L04
- Pump carts scheduled for removal tomorrow
BSY
- VIP2C00A swapped
- Pre-leak check passed
- Final leak check tomorrow after pumping with cart overnight
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
Updates on C75/C100s
1L05 & 1L10 probes are not connected after plasma process attempts. Will connect them on Friday (next opportunity) and then they are good to go
1L09 You can do the tests. All checked.
1L23 you can test all the cavities. HV may drop time to time.
1L24&25 are not PSS certified yet
1L26 cannot turn RF on with BL valves are closed.
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 02-11-26
Time : 15:29:45
Day : Wednesday
Shift : Swing
Crew Chief : Richardson
Program Deputy: Mock
Team : X
Arm : RADCON
Designated SSO: Anthony
LERF Operator:
Operators : Anthony
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
COMMENT ON C100-03-R Cryomodule Installation in 2L25
Attempted to reconnect RF waveguides to penetrations, but found half height waveguides and penetration waveguides transversely misaligned by ~1.25 inches (penetration waveguides have been clamped with strain relief bars since before removal, so we are reasonably confident they have not drifted). Work paused until tomorrow to confer with SRF.
COMMENT ON BSY ion pump swap
The following cavities have been unbypassed: 1L06-3
COMMENT ON Removal and Installation of Girders 2L03A & 2L04A
COMMENT ON Removal and Installation of Girders 2L03A & 2L04A
The following cavities have been GSET 0: 1L04-8
The following cavities have been GSET 0:
1L04-8
Username: michaelm
Date/Time: 02-11-26_14:47:55
RF Status: Good
Tuner Status: Bad
Comment: GSET 0 - stepped off +100k - Not seeing frequency response; check w tuning cart
Special Instructions: Leave tuner in manual
Maintenance Tag: Component: Other
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
Please update this ATLis with a list of which zones will next require a DecaRad setup.
Please also update the list when a tested zone's FE data has been analyzed and validated, and its DecaRad can be removed.
Systems are currently set up on 1L07, 1L09, 1L22.
Up next?- 1L05, 1L10, 1L23, 1L24, 1L25.
COMMENT ON Routine Maintenance of ODH Systems (Managed by SSG).
COMMENT ON Routine Maintenance of ODH Systems (Managed by SSG).
The following cavities have been unbypassed: 1L04-8
The following cavities have been unbypassed:
1L04-8
Username: michaelm
Date/Time: 02-11-26_14:22:05
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - Test; tuner moved freely warm and was cooled with exerciser
Special Instructions: Leave tuner in manual
Maintenance Tag: Component: Other










