Aggregator

Log Number: 4489892Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4489891Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-20-26
Time : 15:51:10
Day : Monday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Ogur
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:

Log Number: 4489890Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4489888Logbook(s): 

• ELOG

Entry Makers: bbarker

Log Number: 4489887Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4489886Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4489885Logbook(s): 

• ELOG

Body: 

Log Number: 4489884Logbook(s): 

• ELOG

Body: 

Make sure the relevant PTW for the given zone / transformer is on-issue before proceeding. Approved.

Log Number: 4489882Logbook(s): 

• ELOG

Body: The following Bypassed Interlock had it's Expected Removal Date changed in the Accelerator Bypassed-Interlocks Log (ABIL) Previous Expected Removal Date: 15 Apr 2026 New Expected Removal Date: 20 Oct 2026 Who made the change: jkowal Justification for the change: Wave Guide configuration maintained without change.

Log Number: 4489881Logbook(s): 

• BTLOG
• ELOG
• POLOG

Body: 

Ops did these measurements:

1. Hall A at 20 and 65 uA (250 MHz)
https://logbooks.jlab.org/entry/4489817
https://logbooks.jlab.org/entry/4489830

2. Hall C at 20 and 65 uA (500 MHz):
https://logbooks.jlab.org/entry/4489858
https://logbooks.jlab.org/entry/4489855

3. Hall B and D at 20 uA (250 MHz):
https://logbooks.jlab.org/entry/4489864
https://logbooks.jlab.org/entry/4489867

4. All Halls at 2 uA:
https://logbooks.jlab.org/entry/4489871

Log Number: 4489880Logbook(s): 

• ELOG

Body: 

Pre-job walkthrough was completed. IC 15428 is approved, PTW 10492 will be approved and placed On Issue following completion of a pre-job brief. No work will begin until completion of the PJB, the PTW is approved and put On Issue.

Log Number: 4489879Logbook(s): 

• ELOG

Body: 

Both 20A supplies have been replaced in MQK8A03 W202B03 CH 5 and MQK4R08 NL01B09 CH 9
Closing JLab-PTW-10540

- Kissinger, Crespo

Log Number: 4489878Logbook(s): 

• ELOG
• RFLOG

Body: 

Pass 4 will be OOC until troubleshooting is completed. SRM has been updated accordingly.

Log Number: 4489875Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: North and South Linac being surveyed.

Log Number: 4489876Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4489874Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 7 0

Log Number: 4489873Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632
Data from: /usr/opdata/burt/allsnap/04-20-26_05:36:08
Restored file: /tmp/04-20-26_15:14:34.snap


Restoring injector to pre-beam study settings

Log Number: 4489872Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: bbarker 04-20-26 15:14:14 {A:i B:3 C:2 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.

Log Number: 4489871Logbook(s): 

• ELOG

Body: 
Additional Comments:
Circle Line: D Laser Square Line: C Laser + Line: B Laser X Line: A Laser

Log Number: 4489868Logbook(s): 

• ELOG
• RFLOG

Entry Makers: jhowardBody: 

Both come from the RF separator captain screen. IOT faults and the faults screen next to RF ON. If we can't get to recover, leave it off.