Aggregator

Log Number: 4544160Logbook(s): 

• DCLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4544157Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Resumed control of CC cell phone.

Log Number: 4544156Logbook(s): 

• ELOG

Body: 

Heat & Activation done under ATLis https://tasklists.jlab.org/atlis/tasks/121145

Log Number: 4544154Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             08/21/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4544155Logbook(s): 

• ELOG

Entry Makers: schoeneBody: 

Crew Chief and 2 operators stamped in and on-site, for all of your Operations needs.

Log Number: 4544153Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             08/21/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4544152Logbook(s): 

• ELOG
• LERFLOG

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

Date : 08-21-26
Time : 08:05:01
Day : Friday
Shift : Day

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

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

Log Number: 4544149Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: ATLis 

Log Number: 4544148Logbook(s): 

• ELOG
• BPMLOG

Body: 

Log Number: 4544147Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4544146Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4544145Logbook(s): 

• BTLOG
• POLOG
• ELOG

Body: 

Results from first look at the timing of the signals:
https://logbooks.jlab.org/entry/4543891

Need to figure out why Tsettle is starting 50 us after Beam Sync.

Log Number: 4544142Logbook(s): 

• DCLOG
• ELOG

Body: 

Operator investigated North Access Rack Room and found nothing out of the ordinary. Trims continue to mismatch periodically ~1.5 hour and/or with temperature swings

Log Number: 4544101Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

per AOD 3.4.2.1

Log Number: 4544100Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             08/21/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4544062Logbook(s): 

• DCLOG
• ELOG

Entry Makers: bschaumlBody: 

The room temperature is jumping up about 10 degrees every 1.5 hours and seems to be associated with many trim magnets in the room mismatching at once. I can't head out there at the moment, but I'll drop by on my way out to see if anything is amiss. For the time being, I'm OPS-PRing this because it just seems very strange.

Log Number: 4544046Logbook(s): 

• ELOG

Body: 

Ran Miram curves program in 2L15 first. Picked a zone with no bypassed cavities, Klsytron jumpers removed, or known issues with high KMAI. Cavities in 2L15 did not show high KMAV or KMAI during testing. Program ran to completion and Plots of curves attached here ("2L15_20260820_MiramPlots.png").

Log Number: 4544043Logbook(s): 

• DCLOG
• ELOG

Entry Makers: bschaumlBody: 

Some trims are not happy at 0 A and occasionally cause a frustrating number of alarms for very small (on the order of 0.011 A) mismatches. It looks like a hysteresis cycle will get the alarms to simmer down for a while, but DC Power on-call gave us permission to put a bit of current (I am interpreting this to be +/-1 A) into them if it allows us to retain our sanity. I have an allsave with all the appropriate trims set to 0 A for when we need to put them there again.

Log Number: 4544037Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl01

Saved: bschauml 08-20-26 17:11:13 {A:i B:1 C:5 E:1060 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4544013Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

I encountered a bug with Hall D nominal current reporting -2492 nA which appears to be a result of the background being measured as 2.724 uA. Looking at the LivePlot I had running during the background measurement preceding the Hall D nominal current measurement, it doesn't appear that the Faraday cup was actually measuring anywhere near what the script reports. I suspect it may be measuring 0.002724 uA and erroneously multiplying this by a factor of 1000, perhaps due to the new update for reporting the nominal current measurements for low current halls in nA.