Aggregator

Log Number: 4542122Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Found 3 cavities that moved the needle with a .1 MV/m step: 2L22-5 (-1.7 MV/m), 2L24-7 (-.9 MV/m), and 2L25-6 (-3 MV/m). These three reductions nearly halved the SL neutron dose for a loss of 3.9 MeV.

Once again did not change drive high, I'll let experts decide.

Log Number: 4542114Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Cavity started SOSing, so I attempted a quick close loop tune, but the TDOff seemed to be in a good spot. Lowered attenuator to 0, but now its creeping back up. We'll derate it and hope it stays stable.

Log Number: 4542093Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Only found 2 cavities that changed the neutron dose rate at all by changing .1 MV/m: 1L10-1 and 1L23-7
Derating these cavities until they no longer moved the needle (-1 MV/m and -1.3 MV/m respectively, so total -1.4 MeV) reduced the total neutron dose across the NL by 15%.

I haven't updated DRVHs yet in case the experts would prefer the headroom

Log Number: 4542070Logbook(s): 

• ELOG
• RFLOG

Entry Makers: msmithBody: 

VIP1L26A vacuum fault seems to have tripped 1L25

Log Number: 4542067Logbook(s): 

• HDLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542066Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD80-213 80um 0/90 degPass: 5.5Note: Calibrated On:2026-Jul-30 09:33Calibrated By: dthomasFile:D-2026-07-30_0933_JD80-213_80um_0_90_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4542046Logbook(s): 

• DCLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542037Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             08/13/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4542034Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             08/13/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4542027Logbook(s): 

• HDLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4542025Logbook(s): 

• ELOG
• RFLOG

Entry Makers: dturnerBody: smartRAT Vpro 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 2026-08-05-2026-08-12"


Data directory: /cs/prohome/apps/s/smartRAT2/pro/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-08-05-2026-08-12/PCA/

Log Number: 4542022Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: deir 08-12-26 23:58:18 {A:i B:1 C:5 E:1060 A=BS B=CW C=CW D=BS 0R08=67.50 No dumps in.

Log Number: 4542021Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: 4.5x10-4 Al 40umPass: 5.5Note: Calibrated On:2026-Jul-11 10:12Calibrated By: alexsFile:D-2026-07-11_1012_4.5x10-4_Al_40um_Pass-5.5_High_Current.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4542012Logbook(s): 

• ELOG
• LERFLOG

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

Date : 08-12-26
Time : 23:13:12
Day : Wednesday
Shift : Owl

Crew Chief : Deir
Program Deputy: Park
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: 4542010Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

While recovering zone from HV trip, cavity 8 was SOSing and had high GASK. Attempted OLT several times and had to lower attenuator from 9.0 to 5.0

Log Number: 4542009Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: CW to xBCD.

Log Number: 4542005Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4541969Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17659Title:
2L14-8 high GASK and tripping after zone HV trip

Summary:
We are working on getting the cavity stable.

Log Number: 4541965Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17659Title:
2L14-8 high GASK and tripping after zone HV trip

Summary:
We are working on getting the cavity stable.

Log Number: 4541960Logbook(s): 

• ELOG

Entry Makers: dthomasBody: