Aggregator

Log Number: 4504433Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Price
DATE:             05/26/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4504424Logbook(s): 

• ELOG
• RFLOG

Entry Makers: dturnerBody: smartRAT V3-4 on opsrfdaqnl1

To view waveforms from a timestamp:

ssh opsrfdaqnl1 "smartRAT -m DAQ -d /data/fast_daq/<timestamp>"


To view waveforms of the top 25 from this report:

ssh opsrfdaqnl1 "smartRAT_view_daily_top25 2026-05-18-2026-05-25"


Data directory: /cs/prohome/apps/s/smartRAT2/3-4/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-05-18-2026-05-25/PCA/

Log Number: 4504422Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: jhoward 05-25-26 23:44:48 {A:i B:5 C:3 E:345 A=BS B=CW C=CW D=CW 0R08=57.03 No dumps in.

Log Number: 4504421Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-25-26
Time : 23:41:05
Day : Monday
Shift : Owl

Crew Chief : Howard
Program Deputy: Saitiniyazi
Team : D
Arm : Chaudhary
Designated SSO: Price
LERF Operator:
Operators : Price, Chaudhary

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

Log Number: 4504415Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Machine tuning/steering in progress.

Log Number: 4504413Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4504405Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

Starting around 15:00 today NL service building ODH head had dropped (along with the LERF ODH head OM226)

It then took a steady rise and is now settling at minor alarm levels.
If it continues to fall, it will need attention

Log Number: 4504399Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

Things are getting very tangled.

Between the high interception (suspect to be charging/discharging around/within the chopper)
And rise in BLM's in the early NL (1L08,9,10) around ~19:45 today
The North Linac service building RAD#5 alarm
all these things happening around/at the same time...

Also NL GP seems to be getting more and more slippy. But if I can simply adjust GP and bring down Upstream Halo's (and probably IDX 3S00 as well) then I'll take it as a god thing

Overall, something sad is happening in the north.

Log Number: 4504396Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

North Linac BLM activity is very jumpy compared to what we usually see. 1L08 seems to be in continuous fault with surrounding zones also riding high...

and we still have interception issues in the injector which are shaking everything every time we get a 'suspect' discharge

Log Number: 4504391Logbook(s): 

• DCLOG
• ELOG

Entry Makers: yoonBody: 

took setpoint and cycled

no TC swap

Log Number: 4504390Logbook(s): 

• DCLOG
• ELOG

Entry Makers: yoonBody: 

I noticed while swapping this that the red light at CR32 was blinking on both the second card that had been placed into ch 17, and the third which I put in. I didnt swap out the first one so I'm not positive if it was blinking on that card also. None of the other cards in that bay (third bay down on rack NL01B02) had CR32 lit up.

Log Number: 4504388Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17016Title:
MBC4R06H mismatch, will not take setpoint

Summary:
This is the same problem Day shift had as well as early swing shift. We are swapping the trim a second time on swing shift. The magnet mismatches low by ~0.1 Amp.

Log Number: 4504387Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17016Title:
MBC4R06H mismatch, will not take setpoint

Summary:
This is the same problem Day shift had as well as early swing shift. We are swapping the trim a second time on swing shift. The magnet mismatches low by ~0.1 Amp.

Log Number: 4504381Logbook(s): 

• ELOG
• RADLOG

Entry Makers: yoonBody: 

NA rad monitor in alarm, neutron P2 dose has been rising since around 16:00, rate had spiked to around 1.6 mrem/h

Log Number: 4504377Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Anaomalous spike in IIX6S01 and INX1L08 just before CARM RM05 (N. Access bldg) trip. Noted that both of these detectors are sensitive to the drift in NL gang phase and they drop to reasonable values when the machine is on crest.

Also noted that the injector interception was lower when we resumed beam delivery.

Log Number: 4504374Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

recovered without issue

Log Number: 4504373Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

cycled the keys to fix

Log Number: 4504371Logbook(s): 

• HCLOG
• ELOG

Entry Makers: dchriBody: 

Turned FFB on once things settled down and we were smooth sailing again. A bit of a disruption once it came on, but not enough movement to trip beam.

Noticed that once it came on, position signals 3C(12,7,16,....) are getting noisy
However, lock positions seem happier.

For now, I'm going to let it ride.

Overall, IonChamber rates seem unaffected (not better, not worse)

Regardless, I'll keep an eye on it through shift

Log Number: 4504365Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Mostly back to rels...didn't get the "before" picture.

Log Number: 4504360Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

Went into alarm but has been disabled per BCM cavity temp alarm guidance