Aggregator

Log Number: 4538694Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4538692Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Humphry
DATE:             08/06/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4538685Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             08/06/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4538675Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: lrichard 08-06-26 07:43:40 {A:i B:1 C:5 E:1060 A=BS B=CW C=CW D=CW 0R08=72.09 No dumps in.

Log Number: 4538667Logbook(s): 

• ELOG
• LERFLOG

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

Date : 08-06-26
Time : 07:25:25
Day : Thursday
Shift : Day

Crew Chief : Richardson
Program Deputy: Latosky
Team : X
Arm : Humphry
Designated SSO: Janak
LERF Operator:
Operators : Humphry, Janak

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

Log Number: 4538665Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L03-2
Username: benesch
Date/Time: 08-06-26_07:25:30
RF Status: Good
Tuner Status: Good
Comment: DRVH=7.400 Arc Rate Management four at 7.6, 3-4 h spacing
Previous OPS DRVH: 7.6
Special Instructions:

Log Number: 4538664Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L03-1
Username: benesch
Date/Time: 08-06-26_07:24:34
RF Status: Good
Tuner Status: Good
Comment: DRVH=6.800 Arc Rate Management four at 6.88, irregular spacing, and one at 6.1
Previous OPS DRVH: 0
Special Instructions:

Log Number: 4538659Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17626Title:
2L14-3 OLT

Summary:
Noticed the cavity SOSing without tripping FSD. Unstable GASK.

Log Number: 4538658Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17626Title:
2L14-3 OLT

Summary:
Noticed the cavity SOSing without tripping FSD. Unstable GASK.

Log Number: 4538657Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam to B, C, D.

Log Number: 4538655Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4538656Logbook(s): 

• ELOG
• RFLOG

Entry Makers: kpriceBody: 

Recently GASK for this cavity has been gradually rising during periods of high current. This time it started SOSing, so I tuned it a little and opened the attenuator from 5 -> 2.

Log Number: 4538654Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
2L13-6
Username: victorc
Date/Time: 08-06-26_07:04:33
RF Status: Good
Tuner Status: Good
Comment: DRVH=3.600 Instability (maybe CWWT?) above 3.6 MV/m at ~360 uA linac current
Previous OPS DRVH: 3.8
Special Instructions:

Log Number: 4538643Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17625Title:
Hall C config change

Summary:
changing configuration Duration:
55 minutes

Time Down:
06-Aug-2026 05:43

Time Up:
06-Aug-2026 06:38

Log Number: 4538642Logbook(s): 

• ELOG
• RFLOG

Entry Makers: victorcBody: 

Tripped five times in five minutes. Unsure of the actual cause. Has been steady since derating.

Log Number: 4538636Logbook(s): 

• ELOG
• LERFLOG

Tags: 

• ShiftSummary

Body:  LERF SHIFT LOG Summary

Start of shift: Completing Gradient checks for Cavity 8

Log Number: 4538635Logbook(s): 

• DCLOG
• ELOG

Entry Makers: victorcBody: 

Every now and then we get short bursts of disruptive comm error alarms in the MCC for this magnet. There was a trim card swap on 07/07/26 to successfully quell mismatches (which also happened to quiet the comm errors that were happening at the time). I think the card could use a reseat, swap, or investigation at the next opportunity.

10 Amp, rack W102B12, channel 15.

Log Number: 4538632Logbook(s): 

• HDLOG
• ELOG

Entry Makers: kpriceBody: 

Ion chambers set for 200 nA with 30% margin. MaxJuice is 250 nA.

Log Number: 4538631Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD80-213 80um 0/90 degPass: 5.5Note: Calibrated On:2026-Jul-30 09:33Calibrated By: dthomasFile:D-2026-07-30_0933_JD80-213_80um_0_90_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4538630Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD80-213 80um 0/90 degPass: 5.5Note: Calibrated On:2026-Jul-30 09:33Calibrated By: dthomasFile:D-2026-07-30_0933_JD80-213_80um_0_90_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)