Aggregator
Injector Alarm Limits Set
FSD Masking Tool: Successful Destination masking to: Inj500KeV
1L12 Waveguide update
Currently, RF believes they have isolated the issue to cavity 5, but still cannot find the leak. In discusson with RF and SSG group leaders, the staffing is not available to lock out the zone and plate out the waveguides. We do not have enough headroom to bypass the zone (currently have 23 MeV of headroom w 1L12, but 37 MeV in the zone). We are unfortunately unable to run tonight.
The following cavities have been UnGSET 0: 1L12-8
The following cavities have been UnGSET 0:
1L12-8
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been UnGSET 0: 1L12-7
The following cavities have been UnGSET 0:
1L12-7
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been UnGSET 0: 1L12-5
The following cavities have been UnGSET 0:
1L12-5
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been UnGSET 0: 1L12-4
The following cavities have been UnGSET 0:
1L12-4
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been UnGSET 0: 1L12-3
The following cavities have been UnGSET 0:
1L12-3
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been UnGSET 0: 1L12-1
The following cavities have been UnGSET 0:
1L12-1
Username: samari
Date/Time: 07-25-26_00:30:30
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - test
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Operator Entry - See SME
The following cavities have been GSET 0: 1L12-8
The following cavities have been GSET 0:
1L12-8
Username: samari
Date/Time: 07-25-26_00:29:05
RF Status: Good
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - test, WG pressure
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Other
The following cavities have been GSET 0: 1L12-7
The following cavities have been GSET 0:
1L12-7
Username: samari
Date/Time: 07-25-26_00:29:05
RF Status: Good
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - test, WG pressure
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Other
The following cavities have been GSET 0: 1L12-5
The following cavities have been GSET 0:
1L12-5
Username: samari
Date/Time: 07-25-26_00:29:05
RF Status: Good
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - test, WG pressure
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Other
The following cavities have been GSET 0: 1L12-4
The following cavities have been GSET 0:
1L12-4
Username: samari
Date/Time: 07-25-26_00:29:05
RF Status: Good
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - test, WG pressure
Special Instructions: , HPA breaker tripped
Maintenance Tag: Component: Other
Operator SIGN IN
COMMENT ON LOTO 1L12 to Troubleshoot and Restore
The leak has been isolated to 1L12-5 but no source of the leak can be seen upstairs. New tubing has been fabricated and attached but has not resolved the issue. Workers used Spotter to aid leak detection but could find no source of the leak upstairs. Both workers have been on the job as long as is allowed so work is being paused until morning when more support will be available.
smartRAT Cavity Instability Detection Daily Report
To view waveforms from a timestamp:
ssh opsrfdaqnl1 "smartRAT -m DAQ -d /data/fast_daq/<timestamp>"
To view waveforms of the top 25 from this report:
ssh opsrfdaqnl1 "smartRAT_view_daily_top25 2026-07-17-2026-07-24"
Data directory: /cs/prohome/apps/s/smartRAT2/3-5/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-07-17-2026-07-24/PCA/
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 07-24-26
Time : 23:18:49
Day : Friday
Shift : Owl
Crew Chief : Deir
Program Deputy: KLarrieu
Team : A
Arm : Smith
Designated SSO: Samari
LERF Operator:
Operators : Samari, Smith
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
Crew Chief Shift Log, 2026-07-24 SWING
Start of shift: Machine restoration in progress.










