Aggregator
CREW CHIEF SIGN IN
Log Number: 4489891Logbook(s): 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:
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:
QuickPic - C Laser FastSEE Spectra 10uA
QuickPic - C Laser FastSEE Spectra 2uA (IGNORE)
QuickPic - B Laser FastSEE Spectra10uA
QuickPic - A Laser FastSEE Spectra10uA
APPROVED Verify the integrity of the Macro Magnetics Transformers in the NL
COMMENT ON Verify the integrity of the Macro Magnetics Transformers in the NL
CMTF 16 KW 1497 RF Wave Guide Switchers, ABIL tag #9149, Expected Removal Date changed.
Log Number: 4489882Logbook(s): 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.
COMMENT ON Measure Electron Beam Bunch Length Using Chopper Phase Scans
Log Number: 4489881Logbook(s): 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
COMMENT ON LOTO of ARC8 for LCW repairs and associated work
COMPLETED Replace two 20A SCE
COMMENT ON Swap FDU 1 with FDU 3
Crew Chief Shift Log, 2026-04-20 DAY
Log Number: 4489875Logbook(s): Tags: Body:
CEBAF SHIFT LOG
Shift Summary
Start of shift: North and South Linac being surveyed.
QuickPic - Injector Restored to Pre-Beam Study Ssettings
Crew Chief Timesheet Summary: 20 Apr 2026 DAY
Log Number: 4489874Logbook(s): Tags: Body:
Accelerator
PHYSICS
STUDIES
RESTORE
ACC
DOWN
OFF (SAM)
Planned
0
7
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