Aggregator

Log Number: 4501207Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Closed the slit for Hall A/D to 23, which eliminated the bleedthrough from hall C into hall B. I was able to send the 2 nA CW for swipes with minimal upstream rates.

Log Number: 4501206Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4501203Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             05/19/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4501202Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             05/18/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4501200Logbook(s): 

• ELOG
• RFLOG

Entry Makers: alexsBody: 

After recovering zone HV from the waveguide pressure permissive drop, cavity 8 was stuck in SEL, and wouldn't even go to SELA. Tried adjusting KPOWscale, POFF, and DETApl to no avail. After conferring with RF, agreed to bring it up at 16 MV/m since that worked and leave it at that for the night. Next time a maintenance window comes along, hopefully an SME can re-optimize the cavity for its drive high.

Log Number: 4501199Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: deir 05-19-26 00:06:58 {A:i B:5 C:3 E:345 A=BS B=BS C=CW D=CW 0R08=15.09 No dumps in.

Log Number: 4501196Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Currently we have CW to C and D. Hall C is requesting 40 uA, but we can't send more than 36 uA without tripping BLA. This could be a calibration issue. I'm looking into machine loss at the moment to determine if that's if the case.

Hall B Tagger is on but tuning is ongoing. We have significant bleedthrough going into xB from the A slit again as we expected. We are going to have to neck down the A Slit (Hall D) in order to send 40 uA to xC and it be acceptable for Hall B.

Log Number: 4501194Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-19-26
Time : 00:03:06
Day : Tuesday
Shift : Owl

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

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

Log Number: 4501189Logbook(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 2026-05-11-2026-05-18"


Data directory: /cs/prohome/apps/s/smartRAT2/3-4/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-05-11-2026-05-18/PCA/

Log Number: 4501185Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16949Title:
1L10-8 SELAP Troubleshooting

Summary:
After recovering zone HV from waveguide pressure drop, cavity 8 was stuck in SEL due to not fully understood LLRF 3.0 SELAP limits.

Log Number: 4501184Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16949Title:
1L10-8 SELAP Troubleshooting

Summary:
After recovering zone HV from waveguide pressure drop, cavity 8 was stuck in SEL due to not fully understood LLRF 3.0 SELAP limits.

Log Number: 4501183Logbook(s): 

• HDLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4501182Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4501179Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Halls B/C/D in Controlled Access, Double Pass Change in progress. 

Log Number: 4501173Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16948Title:
1L10 Waveguide Pressure Fault

Summary:
Dropped NL to Power Permit.

Log Number: 4501172Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16948Title:
1L10 Waveguide Pressure Fault

Summary:
Dropped NL to Power Permit.

Log Number: 4501170Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4501167Logbook(s): 

• ELOG
• RFLOG

Entry Makers: alexsBody: 

Zone dropped out of high voltage on waveguide pressure fault. Locally inspected and confirmed waveguide pressure is fine at ~0.6 PSI, but found one of the PSS PLCs is lit up with a bunch of fault indicators. Contacted SSG for advice.

Log Number: 4501161Logbook(s): 

• HCLOG
• ELOG

Entry Makers: shrinerBody: 

Log Number: 4501153Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget:Loop 2 10cmPass:3Note:Calibrated On:2026-May-18 22:28Calibrated By:shrinerFile:C-2026-05-18_2228_Loop_2_10cm_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton20,000</td