Aggregator

Log Number: 4492153Logbook(s): 

• HCLOG
• ELOG
• RADLOG

Entry Makers: janakBody: 

Log Number: 4492151Logbook(s): 

• ELOG

Body: 

No further regulation issues have been noted. However, it was found that there are some comm issues. It was decided while hall D reconfigures to use their installations including IPM5C11A to try and iron out the lack of alarm propagation. We will be powering the units off and on and potentially disconnecting their comm cables. As such some alarms are to be expected. Prior to any changes Mcc will be notified and coordinated with.

Log Number: 4492148Logbook(s): 

• CLOG
• ELOG

Entry Makers: nortonBody: 

The superconducting level measurements for 1L18 and 1L20 froze and stopped reading correctly.
1L18 froze at 1449 on 4-23
1L20 froze at 0736 on 4-25

Power cycling the AMI-1700 level monitor units restored functionality. 1L18 had in fact emptied to 33%, while 1L20 had overfilled to ~96%.

Our investigation into this continues.

Log Number: 4492147Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16813Title:
1L20 Liquid level

Summary:
Liquid level increased to ~96% causing FSD tripDuration:
12 minutes

Time Down:
27-Apr-2026 09:04

Time Up:
27-Apr-2026 09:

Log Number: 4492144Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Liquid level increased and caused FSD trip. Zone is GSET 0.
Masking P1s.
1L18 Liquid level dropped concurrently, that is also GSET 0 and will be masked.

Log Number: 4492143Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16813Title:
1L20 Liquid level

Summary:
Liquid level increased to ~96% causing FSD tripDuration:
6 minutes

Time Down:
27-Apr-2026 09:04

Time Up:

Log Number: 4492133Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             04/27/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4492132Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Blackshaw
DATE:             04/27/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4492129Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: SL escorted access for 2L13-8 tuner checkout.

Log Number: 4492126Logbook(s): 

• ELOG

Entry Makers: BARBOURJZLBody: 

Changed guard vac. #2, CHL2 2K DP and HDR #2 filters. ***HDR water flow meter is leaking***. Need more cart. filters for CHL2 2K DP down stairs.

Log Number: 4492122Logbook(s): 

• DCLOG
• ELOG

Entry Makers: victorcBody: 

Wouldn't retake setpoint. Swapped card. This is the second trim card swap for this magnet the last 24 hours.

Log Number: 4492119Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16812Title:
MBC4A30V mismatch, swapping trim card

Summary:
Trim card swap is expected to resolve the problem.

Log Number: 4492117Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16812Title:
MBC4A30V mismatch, swapping trim card

Summary:
Trim card swap is expected to resolve the problem.

Log Number: 4492112Logbook(s): 

• ELOG

Body: 

No issues detected over the weekend. All cards operating as normally.

Log Number: 4492113Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4492111Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4492109Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: chumphry 04-27-26 07:23:47 {A:i B:3 C:2 E:345 A=BS B=CW C=CW D=BS 0R08=9.81 No dumps in.

Log Number: 4492108Logbook(s): 

• ELOG

Body: Image captions have the different settings and are as follows:
slit position / integration time/ gain/ gamma/ beam current

Camera ID: [ id = SLI3C, pv = SLI3C:image1:, name = 3C12 SLI, connection = epics, url = http://opscam1:8081/SLMINJMJPG1.mjpg ]

Log Number: 4492107Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-27-26
Time : 07:20:15
Day : Monday
Shift : Day

Crew Chief : Humphry
Program Deputy: Sereno
Team : E
Arm : RadCon
Designated SSO: Janak
LERF Operator:
Operators : Blackshaw, Janak

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

Log Number: 4492104Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: CW beam to Halls B and C.