Aggregator

Log Number: 4495472Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: xBCD Beam

Log Number: 4495471Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Barker
DATE:             05/06/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4495470Logbook(s): 

• ELOG
• INCLOG

Entry Makers: schoeneBody: 

Dumplette insert/retracted readbacks are flaking without user input. I&C on call has been contacted. Dumplette has been inserted for the time being to see if the issue is a readback issue or if the dumplette is really moving.

Log Number: 4495467Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             05/06/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4495465Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4495463Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4495462Logbook(s): 

• ELOG

Body: 

Once the PTW for this job is linked and on-issue this task is approved.

Log Number: 4495460Logbook(s): 

• ELOG
• LLRFLOG

Body: 

1L09 was rewrapped yesterday morning.

Log Number: 4495459Logbook(s): 

• ELOG

Body: 

Once the PTW is on issue this task is approved. As described, coordinate with anyone working in the affected area.

Log Number: 4495444Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-06-26
Time : 07:31:04
Day : Wednesday
Shift : Day

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

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

Log Number: 4495441Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: CW to xCD. Tune to xB Tagger.

Log Number: 4495440Logbook(s): 

• HDLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4495439Logbook(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: 4495435Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4495430Logbook(s): 

• BTLOG
• ELOG

Entry Makers: samariBody: 

The buncher gradient going from 4 to 4.4 with Inj SME approval seems to have not affected main machine optics.
fig 1 is AE harp with Buncher at new setpoint
fig 2 is Buncher at nominal
Figs 3 and 4 are the sme order at 5C00

However, the optics are very different from Monday? very puzzling. See fig 5 for 5C00 comparison to monday

Log Number: 4495428Logbook(s): 

• FMLOG
• DCLOG
• ELOG

Body: 

Looks like temps may have stopped regulating well around May 1st for some reason.

Log Number: 4495424Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16861Title:
Wednesday Owl Harp Swipes

Summary:
1E01 and then [2468A]E01Duration:
32 minutes

Time Down:
06-May-2026 06:07

Time Up:
06-May-2026 06:39

Log Number: 4495423Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: samari
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8

Log Number: 4495422Logbook(s): 

• POLOG
• ELOG

Body: 

The laser doubling efficiencies are currently too low (see linked entries). The bleed-through issues observed in the halls are likely tied to the performance of the laser system. In particular, the level of DC light present between the CW pulses is directly related to the second-harmonic generator (SHG) doubling efficiency.

Improving SHG performance is therefore essential: increasing the conversion efficiency will reduce the residual DC light between pulses and, in turn, mitigate the resulting electron beam bleed-through.

Log Number: 4495421Logbook(s): 

• ELOG
• BTLOG

Body: 

Laser Used:

D Laser

Sigmas:

Peak 1 - x Sigma: 0.3432 Peak 2 - u Sigma: 0.5021 Peak 3 - y Sigma: 0.4452