Aggregator

Log Number: 4539542Logbook(s): 

• ELOG

Entry Makers: 531chumphryBody: 

Log Number: 4539537Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Merz
DATE:             08/07/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4539531Logbook(s): 

• DCLOG
• ELOG

Entry Makers: janakBody: 

Took setpoint and cycled. Did not swap trim card

Log Number: 4539527Logbook(s): 

• HCLOG
• ELOG
• INCLOG

Body: 

AM

Moller team is utilizing a sample from the BCMs to validate receiver performance for JLAB and Berkeley designs. The 20 dB inline attenuators were transferred from before the couplers to after, preserving standard Hall C measurement, but adding 20 dB (x10 in RF voltage) to the coupled signals.

The coupled path is obtained by a 10 dB directional coupler (>25 dB of directivity), followed by an isolator (>18 dB of RL), and additional attenuation if necessary....In all, providing 60 dB of isolation from the Hall C receivers.

J. Musson
x7441

Log Number: 4539517Logbook(s): 

• BTLOG
• ELOG

Body: 

Coordinate with facilities, operability and physics. It appears to be mostly non-invasive to the other halls running.

Log Number: 4539515Logbook(s): 

• ELOG

Body: 

door 1 maglock replaced. will perform basic functionality (non-certifying) tests on Monday.

Log Number: 4539510Logbook(s): 

• LERFLOG
• CLOG
• ELOG
• SRFLOG

Entry Makers: weaksmcBody: 

Preparing for 4K warmup of the L2RB LCLS CM in the LERF vault, vault remains ODH2 while valve reconfiguration is occuring

Log Number: 4539509Logbook(s): 

• ELOG
• LERFLOG

Tags: 

• ShiftSummary

Body:  LERF SHIFT LOG Summary

Start of shift: Lerf to Power Permit.

Log Number: 4539486Logbook(s): 

• ELOG

Body: 

I do not believe a decision memo is appropriate or required. Cancel the task.

Log Number: 4539483Logbook(s): 

• ELOG

Body: 

I don't want use to be too hasty in executing this task. For Tuesday 8/11, let's scope out the work involved in the SL, but nothing more. Please submit a proposal to the Director of Accelerator Operations, a la CEBAF Decision Memo, for the change so that it can be adequately reviewed and approved before moving forward. Thanks.

Log Number: 4539477Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4539475Logbook(s): 

• ELOG

Body: 

haven't heard of any issues since replacing it. No work has been performed on this task since last comment. Consider complete.

Log Number: 4539473Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L18-8
Username: benesch
Date/Time: 08-07-26_10:22:49
RF Status: Good
Tuner Status: Good
Comment: DRVH=9.100 Arc Rate Management five at 9.3, decreasing spacing
Previous OPS DRVH: 9.3
Special Instructions:

Log Number: 4539472Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4539462Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: Loop 2 10cmPass: 5Note: Calibrated On:2026-Jul-27 23:36Calibrated By: shrinerFile:C-2026-07-27_2336_Loop_2_10cm_Pass-5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton5,364<

Log Number: 4539455Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4539452Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17633Title:
Hall C: Target Change

Summary:
Change target to Loop 2 @ 60 uA CWDuration:
32 minutes

Time Down:
07-Aug-2026 09:25

Time Up:
07-Aug-2026 09:57

Log Number: 4539451Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4539447Logbook(s): 

• ELOG

Body: 

PTW on-issue. Targeting execution Tuesday 8/11. Added to SAM Cal and Work Map.

Log Number: 4539438Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17633Title:
Hall C: Target Change

Summary:
Change target to Loop 2 @ 60 uA CWDuration:
24 minutes

Time Down:
07-Aug-2026 09:25

Time Up: