Aggregator

Log Number: 4496353Logbook(s): 

• ELOG

Body: ACC=>VACUUM=>WEST_ARC=>ARCA=>VIPAA20 has been disabled in alarm handler

troubleshooting

Log Number: 4496352Logbook(s): 

• ELOG

Body: ACC=>VACUUM=>WEST_ARC=>ARCA=>VIPAA18 has been enabled in alarm handler

ena

Log Number: 4496351Logbook(s): 

• ELOG

Body: ACC=>VACUUM=>WEST_ARC=>ARCA=>VIPAA18 has been disabled in alarm handler

troubleshooting

Log Number: 4496350Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-05-08 02:25:32 The output from the myRestore execution was as follows: iocsoftw3spce systemEnum@2026-05-08 02:25 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftw3spce (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: 4496345Logbook(s): 

• POLOG
• ELOG

Entry Makers: samariBody: 

Seems to be a possiple culprit for injector drift, note the plate's voltage has gottent progressively more noisy after the wein angle change, and the two instances of injector drift correspont roughly in time to the two current spikes. Compared to the stronger Wien setting in fig 2, were it was completely quiet all of the time.

Log Number: 4496339Logbook(s): 

• DCLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4496336Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Came back wthout issue via twiddle tunnel

Log Number: 4496335Logbook(s): 

• HBLOG
• HBRUN
• PRADLOG
• ELOG

Tags: 

• ShiftSummary

Entry Makers: singhBody: 

Start of the Owl Shift: 05/08/2026

Expert: Bhawani Singh
Worker: Dulitha Jayakodige

---

00:00 Took over the shift from Mathieu Ouillon.

00:08 Empty target run 24426 ongoing.

00:42 DAQ is busy; live time is ~1%. Ending the run.

00:48 Started new run 24427. This empty target run initially showed a live time of 97%.

01:03 Ending the run; live time dropped to 0.0% and the DAQ is too busy.

01:08 Started new run 24428, hoping the DAQ live time will improve.

Log Number: 4496334Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             05/08/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4496333Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             05/07/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4496330Logbook(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 2026-04-30-2026-05-07"


Data directory: /cs/prohome/apps/s/smartRAT2/3-4/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-04-30-2026-05-07/PCA/

Log Number: 4496320Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD70-107 55um 45/135 degPass: 5.5Note: Calibrated On:2026-May-03 18:47Calibrated By: alexsFile:D-2026-05-03_1847_JD70-107_55um_45_135_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4496319Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

Log Number: 4496318Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-07-26
Time : 23:29:49
Day : Thursday
Shift : Owl

Crew Chief : Price
Program Deputy: Drury
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: 4496316Logbook(s): 

• BTLOG
• ELOG

Entry Makers: alexsBody: 

Based on the knowledge that the recent drift in the injector orbit begins at the 1I07 BPM, that narrows down the list of most likely suspects based on the injector beamline reference to the magnets MBH1I05, MQW1I05, MQW1I06, the Horizontal Wien, the Pre-buncher, and potentially the spin flipper solenoids. Looking at the available PVs, nothing stands out. No answers, but worth checking.

Log Number: 4496315Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Cavity 1 was most likely the klystron that dropped HV after it blew the klystron resistor that Alex replaced along with cavity three. Cavity 3 must have been bypassed on 05/02/26 because the operator logged it as a driveline problem when it was a klystron with only .5a output vice 1.2a normal. No KCCU/GMES on cavity 3 since 05/02/26. Alex replaced both cavity 1 and 3's 50 ohm resistors and cavity 3 should remain bypassed due to this low klystron KCCU when it was bypassed.

Log Number: 4496314Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L11-3
Username: kerns
Date/Time: 05-07-26_23:22:31
RF Status: Bad
Tuner Status: Good
Comment: .5a KCCU on 05/02/26 when GMES wouldn't recover and it was bypassed. Needs klystron recovered to 1.2a KCCU. Resistor replaced 05/07/26 by Alex S.
Special Instructions:

Maintenance Tag: Component: Tube

Log Number: 4496313Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam to Halls B & D; Hall C down in CA for target ladder issues.

Log Number: 4496312Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4496311Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L11-1
Username: kerns
Date/Time: 05-07-26_23:19:04
RF Status: Good
Tuner Status: Good
Comment: HV dropped in zone after klystron resistor blew apart. Alex S. replaced and recovered.
Special Instructions:

Maintenance Tag: Component: 50 Ohm Resistor