Aggregator

Log Number: 4472098Logbook(s): 

• CLOG
• ELOG

Entry Makers: johnwBody: 

SLinac/FEL/SC1R flow decrease is complete. Flow is at a nominal 170g/s; we are now at our normal operating point.

Log Number: 4472095Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

30 WG vacuum pair still active; will let it pump down overnight and push further. Autorecover turned on for zone.

Log Number: 4472094Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             02/19/2026
SHIFT:               Swing

The operator has read the following:

Log Number: 4472092Logbook(s): 

• ELOG

Body: 

Work is complete

Log Number: 4472088Logbook(s): 

• ELOG

Body: 

All the c100/75 s in the NL are interlocked checked (other than 1L26 with BL vacuum) other than the bypassed cavities

Initiated the SL C100/C75 but only permitted to turn the RF in 2L22 and it is done.

Log Number: 4472085Logbook(s): 

• ELOG
• SRFLOG

Body: 

2L03
- VIP2L03A reconnected to building power
- Valve air lines reconnected

2L25
- New V-blocks installed
- Cleanroom setup slated for tomorrow

MYBBS06
- First leak check passed
- Will pump with cart over weekend, get pressures lower for Monday final leak check and ion pump turn on

Log Number: 4472084Logbook(s): 

• ELOG

Body: 

Entered NL under controlled access.
Adjusted 0R08 5uA and 20uA magnitudes via attenuator knobs.
HCO done.

Log Number: 4472083Logbook(s): 

• ELOG

Body: 

B91 was finished up last week. This task is complete for this SAM

Log Number: 4472082Logbook(s): 

• ELOG

Body: 

Completed the LLRF Pre-Commissioning for Cavities: 
We verified all interlock checks (ARC, window, vac, HE interlock faults)
and all passed without issue (Leo helped with the vacuum interlock tests)

We also put a small amount of forward power into each cavity in SEL
mode. 
We found each cavity to be off machine reference as follows: 
cavity 1:  230kHz,
 cavity 2: 255kHz,
 cavity 3: 186kHz,
cavity 4: 309kHz,
 cavity 5: 187kHz,
 cavity 6: 267kHz,
 cavity 7: 231kHz,
 cavity 8:272kHz,
We did not attempt to tune the cavities. 
Thank you for all helped : ketchum, bachiman, geesaman, plawski,settl

Log Number: 4472081Logbook(s): 

• ELOG

Body: 

Marking complete based on most recent comment.

Log Number: 4472079Logbook(s): 

• ELOG

Body: 

Materials have been removed from tunnel and no additional work is planned on this task during this SAM

Log Number: 4472077Logbook(s): 

• ELOG

Body: 

Work is complete

Log Number: 4472076Logbook(s): 

• ELOG

Body: 

Following a conditions re-evaluation, a construction change request (CCR) has been routed and approved which provides a simple, safe, achievable solution to begin work. Will need to maintain good communication and coordination regarding any vibration-related issues.

Log Number: 4472075Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L18-6
Username: kerns
Date/Time: 02-19-26_15:31:14
RF Status: Good
Tuner Status: Good
Comment: RFCM replaced for comm. errors. Downloads performed.
Special Instructions:

Maintenance Tag: Component: RFCM {Removed SN: 514, Replacement SN: 351}

Log Number: 4472074Logbook(s): 

• ELOG
• LERFLOG

Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 02-19-26
Time : 15:18:51
Day : Thursday
Shift : Swing

Crew Chief : Forman
Program Deputy: Buttles
Team : F
Arm : RADCON
Designated SSO: Schaumloffel
LERF Operator:
Operators : Schaumloffel

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

Log Number: 4472073Logbook(s): 

• ELOG
• RFLOG

Body: COMMENTS: RFCM replaced for comm. errors.


The following module files were successfully downloaded
nl186e nl186d

Log Number: 4472072Logbook(s): 

• ELOG

Body: 

Subcontractor completed required training to commence work between NL and CHL. Work will resume on Friday (2/20) or Monday (2/23) depending on weather conditions.

Log Number: 4472070Logbook(s): 

• ELOG

Body: 

Status update?

Log Number: 4472069Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632
Data from: /usr/opdata/burt/allsnap/02-18-26_11:51:59
Restored file: /tmp/02-19-26_15:08:49.snap

Log Number: 4472068Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been GSET 0:
1L13-2
Username: michaelm
Date/Time: 02-19-26_15:08:40
RF Status: Bad
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - Regulation issues. Bad RFCM?
Special Instructions:

Maintenance Tag: Component: RFCM