Aggregator

Log Number: 4539597Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 20 rows, time span -8h to 0
Minimum GMES threshold 2.9 MV/m

Log Number: 4539596Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: BCD Beam

Log Number: 4539595Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4539594Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4539585Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4539583Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4539582Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: 10cm DummyPass: 5Note: SHMS angle: -14-74Calibrated On:2026-Jul-28 02:36Calibrated By: msmithFile:C-2026-07-28_0236_10cm_Dummy_Pass-5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton

Log Number: 4539581Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4539578Logbook(s): 

• ELOG
• RFLOG

Body: 

Pass 2, 3, and 4 Separators were taken to off-cold and filaments and HV turned off. Passes are still in working condition and can be restored if needed, this is simply to reduce unnecessary wear and tear.

Log Number: 4539561Logbook(s): 

• LERFLOG
• CLOG
• ELOG
• SRFLOG

Entry Makers: weaksmcBody: 

L2RB Module transitioned to 4K for the weekend, RT valve closed and disconnected, CD valve open and disconnected, LERF vault returned to ODH0

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.