Aggregator

Log Number: 4498727Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Humphry
DATE:             05/14/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4498719Logbook(s): 

• ELOG

Body: 

Log Number: 4498715Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-14-26
Time : 07:31:01
Day : Thursday
Shift : Day

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

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

Log Number: 4498712Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Log Number: 4498711Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

Log Number: 4498709Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Production beam to B, D.  Witness beam to C dumplet.  No gang

Log Number: 4498708Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4498706Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16911Title:
QE Measurement

Summary:
Routine optics measurement.Duration:
13 minutes

Time Down:
14-May-2026 06:59

Time Up:
14-May-2026 07:12

Log Number: 4498705Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: CryoModule
User: victorc
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: 4498704Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 29.183622999999994

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

Log Number: 4498702Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16911Title:
QE Measurement

Summary:
Routine optics measurement.Duration:
4 minutes

Time Down:
14-May-2026 06:59

Time Up:

Log Number: 4498698Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: CryoModule
User: dchri
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: 4498693Logbook(s): 

• HDLOG
• ELOG

Entry Makers: victorcBody: 

Log Number: 4498692Logbook(s): 

• HDLOG
• ELOG

Entry Makers: victorcBody: 

Log Number: 4498682Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

OPS-pr is still open for this ioc (see linked)

Log Number: 4498671Logbook(s): 

• HDLOG
• ELOG

Entry Makers: victorc

Log Number: 4498670Logbook(s): 

• HDLOG
• HBLOG
• ELOG

Entry Makers: victorcBody: 

HWP now out. Per Hall D. All active halls informed.

Log Number: 4498669Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD70-107 55um 45/135 degPass: 5.5Note: Calibrated On:2026-May-03 18:47Calibrated By: alexsFile:D-2026-05-03_1847_JD70-107_55um_45_135_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4498668Logbook(s): 

• HDLOG
• ELOG

Entry Makers: victorcBody: 

Log Number: 4498667Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

xD called for a radiator change and dumplett in, so we tripped beam to accommodate.

FIG.1,2
I've been trying to pin down why/how NL GP has not been slipping. ~1hr run with no adjustments to either North or South GP and the 1A spot has remained mostly intact. So far I haven't pinned down why the slippage has become less aggressive.