Aggregator

Log Number: 4476771Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19 was successfully run for the South Linac on 2026-03-14 03:29:24. The application phase took 00:00:28 to complete.

Log Number: 4476770Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

FudgeIt 5.0 changed the South Linac fudge factor from 0.999 to 1.001.

Log Number: 4476769Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

FudgeIt 5.0 changed the South Linac fudge factor from 1.001 to 0.999.

Log Number: 4476768Logbook(s): 

• ELOG
• INCLOG

Entry Makers: victorcBody: 

This is the image we see from this viewer regardless of whether the lights are on or not. No evidence of beam anywhere.

Log Number: 4476767Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Got through 1R with a combination of shunt and corrector steering. We didn't want to park beam in the linac, so we found a good-enough solution just until we get to to the viewer at the end and can phase up the cavities that are on. The procedure called for using only MXJ1R04 and two vertical correctors but we found we weren't getting a flat enough launch to get us out of the first step of 1R (between MXI1R01 and MXJ1R04) that way, so we also used the 1R01 and 1R02 shunts.

We will *certainly* want to come back and revisit this once we're all the way down the linac.

Log Number: 4476766Logbook(s): 

• ELOG

Entry Makers: victorcBody: 

Could be affecting NL phase and gradient? Levels should be around 50. OPS-PR from earlier this month linked.

Log Number: 4476765Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Chaudhary
DATE:             03/14/2026
SHIFT:               Owl

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4476764Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Price
DATE:             03/14/2026
SHIFT:               Owl

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4476762Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: jhoward 03-13-26 23:40:35 {A:i B:5 C:2 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 2R dump in. dump(s) in.

Log Number: 4476761Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Log Number: 4476760Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-13-26
Time : 23:29:14
Day : Friday
Shift : Owl

Crew Chief : Howard
Program Deputy: Roblin
Team : D
Arm : Chaudhary
Designated SSO: Price
LERF Operator:
Operators : Price, Chaudhary

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

Log Number: 4476759Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Preparing to phase NL C100's

Log Number: 4476758Logbook(s): 

• ELOG

Entry Makers: ketchumkortzeBody: 

Replaced fast valve control card with non-interlocked card and removed Fast Charge Module to prevent the fast valve from closing on phantom trips. (Approved by M. Drury) ABIL#9490

"Valve Open" and "Ready" status permits satisfied for FSD.

Hopefully this will prevent beam interruptions over the weekend.

Will perform more in-depth troubleshooting next week.

Log Number: 4476756Logbook(s): 

• ELOG

Body: The following entry was placed in the Accelerator Bypassed-Interlocks Log (ABIL) Device: VFV1L27 FVC Function: Non-interlocked Fast Valve Control Card Location: NL27B12 Purpose: Inhibit Fast Valve from closing Exp.

Log Number: 4476757Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Called Drury to secure verbal authorization prior to I&C jumpering out VFV1L27 for the weekend.

Log Number: 4476755Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

Similar issue to yesterday (see linked entries), FSD faulted on VFV1L27 and the screen indicates "Not Ready," yet the valve is open. I&C on-call was contacted again. Awaiting further instruction.

Log Number: 4476754Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16496Title:
VFV1L27 fault

Summary:
VFV1L27 fault would not allow FSD to clear.

Log Number: 4476752Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

Area.Linacs.South

Total Time: 0.817 mins

Log Number: 4476751Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

Area.Linacs.South

Total Time: 0.800 mins

Log Number: 4476753Logbook(s): 

• ELOG

Entry Makers: alexsBody: