Aggregator

Log Number: 4483774Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-04-26
Time : 23:34:52
Day : Saturday
Shift : Owl

Crew Chief : Deir
Program Deputy: Malace
Team : A
Arm : Samari
Designated SSO: Smith
LERF Operator:
Operators : Samari, Smith

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

Log Number: 4483772Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: deir 04-04-26 23:34:18 {A:i B:5 C:2 E:345 A=BS B=BS C=CW D=BS 0R08=14.76 No dumps in.

Log Number: 4483769Logbook(s): 

• ELOG

Log Number: 4483768Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift:  Tuning to xB,

Log Number: 4483767Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 4 0 0

Log Number: 4483762Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

Only running nanoamp beam, so not much position information, but IIXAE02 and Hall B's current track almost 1:1. Will have to revisit at some point, but for the moment leaving good enough alone to prioritize beam uptime.

Log Number: 4483760Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

Forgot to snap a pic of the ioc screen, but it alarmed on Memory Block. Rebooted and restored without issue.

Log Number: 4483758Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-04 22:39:03 The output from the myRestore execution was as follows: iocse20 systemEnum@2026-04-04 22:39 2(2) restored seebpm@2026-04-04 22:39 139(139) restored Pause: 30 second(s) SEE_BURT 4(4) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocse20 (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4483756Logbook(s): 

• ELOG
• RADLOG

Body: 

Found RM30 in alarm with both Gamma and Neutron readouts displaying maximum dose rates. I believe the unit and probes may have experienced too much exposure for too long. Replaced power supply card preemptively due to the fact that it had been in alarm for so long. After power cycle, the unit came back up with expected readings. No further work needed at this time.

Log Number: 4483755Logbook(s): 

• HBLOG
• ELOG
• RADLOG

Entry Makers: alexsBody: 

Log Number: 4483754Logbook(s): 

• ELOG

Entry Makers: lrichardBody: 

Figs. 3-5 show levels after repairing probe.

Log Number: 4483751Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16646Title:
RM30 readback error

Summary:
While trying to take xB to Controlled Access, the BSY would not go back into Beam Permit because RM30 is reading 9990000000 mrem/hr. Contacting RadCon for further guidance.

Log Number: 4483750Logbook(s): 

• ELOG

Entry Makers: lrichardBody: 

Log Number: 4483749Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16646Title:
RM30 readback error

Summary:
While trying to take xB to Controlled Access, the BSY would not go back into Beam Permit because RM30 is reading 9990000000 mrem/hr.

Log Number: 4483748Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

While trying to take Hall B to Controlled Access, the BSY would not go back to Beam Permit because of a radiation monitor. Apparently RM30 is receiving a dose of 9990000000 mR/h, and has been since ~1150. However, it was not noticed until now because the entire machine has been in Beam Permit since then. Contacting RadCon for further guidance.

Log Number: 4483739Logbook(s): 

• HBLOG
• ELOG

Entry Makers: alexsBody: 

Hall requested the lowest current we could feasibly send

Log Number: 4483737Logbook(s): 

• HBLOG
• ELOG

Entry Makers: alexsBody: 

Log Number: 4483736Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4483735Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4483733Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments