Aggregator

Log Number: 4475013Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-08-26
Time : 15:22:22
Day : Sunday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Schoene
Team : X
Arm : Shenenberger
Designated SSO: Shriner
LERF Operator:
Operators : Shenenberger, Shriner

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

Log Number: 4475009Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Barker
DATE:             03/08/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4475008Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             03/08/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4474999Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Since the 5th there has been excess detuning in the same south linac zones where we saw the exit stair 4 dehumifier's influence in last year with the exact same time signature as the detuning likely caused by exit stair 1's dehumidifier noted late February (see linked logs). We see the same time signature on the panel feeding the dehumidifier in both north and south verified to be operation of the dehumidifiers. Would it be possible to take a look and possibly turn the dehumidifiers in both locations off to verify that they are indeed causing the issue?

Log Number: 4474997Logbook(s): 

• ELOG

Body: ACC=>IOCS=>EAST_ARC=>iocipmbe02=>iocipmbe02:Synch30Hz has been disabled in alarm handler

Consistently giving a nonlatched alarm. Ops PR 4474965

Log Number: 4474996Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-08-26
Time : 07:14:33
Day : Sunday
Shift : Day

Crew Chief : Mock
Program Deputy: Schoene
Team : B
Arm : Thomas
Designated SSO: Barker
LERF Operator:
Operators : Barker, Thomas

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

Log Number: 4474982Logbook(s): 

• ELOG

Entry Makers: deirBody: 

We did not get an alarm for this ODH head in the control room, but an operator noticed that this head was showing <19.5% on the OTF screen.

I went out to the ODH rack in the counting house and took a look at module for Hall C. It's indicating that Sensor 4 is reading 20.2%, Figure 1.

Figs 2,3: EPICS, on the other hand, is showing this sensor at about 19.4%. It is currently in Major Alarm in the Hall C node, but that node is disabled at the moment.

At the module, all of the non-bypassed ODH heads in Hall C are reading >20%.

Looks like it may be reading this low due to changes in barometric pressure.

Log Number: 4474981Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Guards notified us that they saw and heard an ODH alarm in the middle of the high bay area in B58. We went to check it out under ODH2 conditions. No visible signs of a cryogen leak in the area.

Found the panel in the CMTF indicating that sensor 4 was in alarm. The panel's light for sensor 4 was blinking, indicating a high alarm. However, the oxygen readback on the panel for sensor 4 indicated that it was low with an O2 level of 19.6%.

OM5 was still in operation, so we bypassed OM4 and the alarm cleared.

Log Number: 4474979Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             03/08/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4474978Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             03/07/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4474977Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-07-26
Time : 23:24:00
Day : Saturday
Shift : Owl

Crew Chief : Deir
Program Deputy: Schoene
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:

Log Number: 4474976Logbook(s): 

• ELOG

Body: The following entry was placed in the Accelerator Bypassed-Interlocks Log (ABIL) Device: OMC03 Function: Oxygen Monitor Location: Hall C - West Wall Purpose: Failing sensor Exp.

Log Number: 4474975Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

At ~1745 ODH Head OM03 in Hall C dropped to 11.8. After a few minutes it spiked up to 13.8, then back down again to 11.7. SSG on-call was contacted and it was decided to bypass the head since OM03 has had known issues and nearby heads were not in alarm.

Log Number: 4474974Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Friday March 06 through 18:00 Saturday March 07 AES RF Systems RF work for 2026 HCO

2026-03-06 18:03 - Xavier Gomez

More troubleshooting at 2L03

Log Number: 4474973Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Shriner
DATE:             03/07/2026
SHIFT:               Swing

The operator has read the following:

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

Log Number: 4474971Logbook(s): 

• ELOG

Tags: 

• Readme

Entry Makers: eformanBody: 

Log Number: 4474970Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-07-26
Time : 15:42:45
Day : Saturday
Shift : Swing

Crew Chief : Forman
Program Deputy: Schoene
Team : F
Arm : Yoon
LERF Operator:
Operators : Schaumloffel, Yoon

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

Log Number: 4474969Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-03-07 15:26:24 The output from the myRestore execution was as follows: iocsoftw4spce systemEnum@2026-03-07 15:26 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftw4spce (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4474968Logbook(s): 

• POLOG
• ELOG

Entry Makers: mamunBody: 

Reached the Gun HV at 140 kV with no issue, will leave the gun for soaking over the weekend.
Gun vacuum recovered back to baseline before the Gun trip two days ago. No radiation detected on decarad channels. anode currect synched with HVPS current during the ramping for different ramp rates. Everything looks normal to hand over to Ops.

Log Number: 4474967Logbook(s): 

• ELOG

Entry Makers: mockBody: 

Yesterday as a precaution for the Gun issue, the Booster valves were closed (see linked log).
With the injector back in power permit, these valves need to be open to run RF.
Instead closed the next upstream valve, VBV0I06.