Aggregator

Log Number: 4514576Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-21-26
Time : 07:19:27
Day : Sunday
Shift : Day

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

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

Log Number: 4514574Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam to Halls B and C.

Log Number: 4514573Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4514571Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Beam spot on the 1A had spread out, and there was a slight rise in IIX5S01 signal. Adjusted -0.8 degrees to round out spot, which happened to lower 5S01 rates.

Log Number: 4514566Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17232Title:
Nightly QE

Summary:
Routine optics measurement.Duration:
7 minutes

Time Down:
21-Jun-2026 06:45

Time Up:
21-Jun-2026 06:52

Log Number: 4514564Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: CryoModule
User: jhoward
Areas: NorthLinac SouthLinac

CryoModule Devices:
1L14
1L03
1L02
1L04
1L05
1L07
1L06
1L08
1L09
1L10
1L11
1L12
1L15
1L13
1L16
1L19
1L17
1L18
1L20
1L21
1L22
1L23
1L24
1L25
1L26
2L14
2L03
2L02
2L04
2L05
2L07
2L06
2L08
2L11
2L09
2L10
2L12
2L15
2L13
2L16
2L19
2L17
2L18
2L20
2L21
2L22
2L23
2L24
2L25
2L26

Log Number: 4514563Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13000,18350), Charge: 25.174073999999997

Laser Wavelength Atten Setting Laser Power Current HV PS Current QE PV Updated? Update Time/Reason Not Updated (nm) (W) (uA)</

Log Number: 4514565Logbook(s): 

• LERFLOG
• ELOG

Entry Makers: dchri

Log Number: 4514558Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17232Title:
Nightly QE

Summary:
Routine optics measurement.Duration:
2 minutes

Time Down:
21-Jun-2026 06:45

Time Up:
Ca

Log Number: 4514556Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: CryoModule
User: jhoward
Areas: NorthLinac SouthLinac

CryoModule Devices:
1L14
1L03
1L02
1L04
1L05
1L07
1L06
1L08
1L09
1L10
1L11
1L12
1L15
1L13
1L16
1L19
1L17
1L18
1L20
1L21
1L22
1L23
1L24
1L25
1L26
2L14
2L03
2L02
2L04
2L05
2L07
2L06
2L08
2L11
2L09
2L10
2L12
2L15
2L13
2L16
2L19
2L17
2L18
2L20
2L21
2L22
2L23
2L24
2L25
2L26

Log Number: 4514555Logbook(s): 

• ELOG
• LERFLOG

Body: The following entry was placed in the Accelerator Bypassed-Interlocks Log (ABIL) Device: OM204 Function: Oxygen Monitor Location: LERF Tunnel - Zone 03 Purpose: Probable failing sensor. Adjacent head OM207 also bypassed as of this date. LERF Vault posted as ODH 2. Exp.

Log Number: 4514554Logbook(s): 

• ELOG

Tags: 

• Readme

Entry Makers: jhowardBody: 

Log Number: 4514545Logbook(s): 

• ELOG

Entry Makers: jhowardBody: OM204 in the LERF in alarm, dropping very quickly to ~5%. OM203 looks good. Ops investigating and going to bypass. Call x7046 for more info.

Log Number: 4514546Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Sensor 204 (vault ceiling) dropped precipitously to ~4% over a minute or two. Seems to be a failing sensor, as the adjacent active head is reporting normal O2 concentration. Operators en route to investigate.

Log Number: 4514503Logbook(s): 

• HCLOG
• ELOG

Entry Makers: victorcBody: 

Log Number: 4514502Logbook(s): 

• HCLOG
• ELOG

Entry Makers: victorc

Log Number: 4514499Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4514498Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: Carbon 3%Pass: 3Note: SHMS angle: -10.75Calibrated On:2026-Jun-19 20:46Calibrated By: msmithFile:C-2026-06-19_2046_Carbon_3__Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Dump Left

Log Number: 4514497Logbook(s): 

• HCLOG
• ELOG

Entry Makers: victorcBody: 

Log Number: 4514496Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD