Aggregator

Log Number: 4490870Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: samari 04-24-26 08:54:08 {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: 4490863Logbook(s): 

• POLOG
• ELOG

Body: 

nonNRTL stickers were put on cebaf drive laser TMGs, attached are the photos.

Log Number: 4490862Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Inj + NL + Halls in RA, SL in PP, BSY in CA

Log Number: 4490857Logbook(s): 

• ELOG

Body: 

We unplugged the motor cable,was able to turn coupling by hand.We hooked up the drive box and was able to turn freely in both directions. We contacted MCC and let them try to move the coupling and got intermittent movement.They told us to use our drive box and to turn the motor 5 revolutions counterclockwise to get the cavity detuned.

Log Number: 4490859Logbook(s): 

• ELOG
• RADLOG

Entry Makers: bbarkerBody: 

Log Number: 4490855Logbook(s): 

• ELOG

Entry Makers: fhumphryBody: 

RT valve cable unplugged from actuator. Deposted ODH2 area.
ODH2 signs are located on top of 2L25 face down at tuner #1.

Log Number: 4490854Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Barker
DATE:             04/24/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4490853Logbook(s): 

• ELOG
• SRFLOG

Body: 

summary of 2L25 Flow Meter trends and results:

Zone 2L25 Helium Flow Meter Cavity Heat Dissipation Measurements
April 23 24, 2026

Zone 2L25 Helium Flow Meter Cavity Heat Dissipation Measurements
April 23 24, 2026

Heat dissipation measurements were taken across all 8 cavities in zone 2L25 using the Hunt and Match method with the helium flow meter in Sawtooth mode.

Cryo heater baseline was held at ~30W (readback ~40-44W depending on cavity)
JT valve was manually fixed at 45% during measurements
Cavity 1 was measured across a full gradient range (8-20 MV/m)
remaining cavities were measured at

Log Number: 4490852Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schoene
DATE:             04/24/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4490850Logbook(s): 

• ELOG
• POLOG

Tags: 

• Autolog

Body: 

Log Number: 4490849Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned off for:
R02
R03
R04

Log Number: 4490847Logbook(s): 

• ELOG
• POLOG

Tags: 

• Autolog

Body: 

Log Number: 4490844Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             04/24/2026
SHIFT:               Day

Operator Comments: Acting as Temporary SSO for the End of OWL Shift

The operator has read the following:

Log Number: 4490842Logbook(s): 

• CLOG
• ELOG
• SRFLOG

Entry Makers: dchriBody: 

Zone 2L25 — Helium Flow Meter Cavity Heat Dissipation Measurements
April 23–24, 2026

See ATLis for additional details
https://tasklists.jlab.org/atlis/tasks/120026

Heat dissipation measurements were taken across all 8 cavities in zone 2L25 using the Hunt and Match method with the helium flow meter in Sawtooth mode.

Log Number: 4490841Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Degrader beam studies ongoing.

Log Number: 4490840Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 8 0

Log Number: 4490839Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-24-26
Time : 07:13:56
Day : Friday
Shift : Day

Crew Chief : Humphry
Program Deputy: Sereno
Team : X
Arm : Schoene
Designated SSO: Barker
LERF Operator:
Operators : Barker, Schoene

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

Log Number: 4490838Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version 2-16 of the Box Supply Cycling Script:

Log Number: 4490837Logbook(s): 

• BTLOG
• ELOG
• POLOG

Body: 

Chopper scans:
https://logbooks.jlab.org/entry/4490663

Log Number: 4490836Logbook(s): 

• SRFLOG
• CLOG
• ELOG

Entry Makers: dchriBody: 

Backout Procedure:
Take JT valve out of Manual Mode
Place heaters, RF, and JT setpoints back to their original configurations/setpoints
Turn off the flow meter