Aggregator

Log Number: 4507964Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-150-901233

<table border=1 cellpadding = 1 cellspacing =

Log Number: 4507962Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG901501233

Log Number: 4507963Logbook(s): 

• DCLOG
• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled. probably swap the card next mismatch.

Log Number: 4507961Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-30301233

Log Number: 4507960Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632
Data from: /usr/opdata/burt/allsnap/06-03-26_00:22:23
Restored file: /tmp/06-03-26_02:03:28.snap

Log Number: 4507959Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: samari 06-03-26 02:03:13 {A:i B:1 C:3 E:1060 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. dump(s) in. Autosave prior to restore.

Log Number: 4507954Logbook(s): 

• DCLOG
• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled

Log Number: 4507953Logbook(s): 

• DCLOG
• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled

Log Number: 4507947Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: samari 06-03-26 00:22:23 {A:i B:1 C:3 E:1060 A=BS B=BS C=Tune D=BS 0R08=0.00 0R08 dump in. dump(s) in.

Log Number: 4507946Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-06-03 00:09:10 The output from the myRestore execution was as follows: iocse15 systemEnum@2026-06-03 00:09 2(2) restored seebpm@2026-06-03 00:09 323(323) restored Pause: 30 second(s) SEE_BURT 8(8) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocse15 (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: 4507944Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Shriner
DATE:             06/02/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4507939Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-02-26
Time : 23:12:01
Day : Tuesday
Shift : Owl

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

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

Log Number: 4507938Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

The comm alarm on MXV4R04 will not clear completely.
When acknowledging the comm alarm on MXV4R04 the alarm would clear and come back in after just a few seconds. Disabled alarm to stop the incessant beeping. Box supply is off.

Log Number: 4507937Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Kernal patch restore on-going.

Log Number: 4507936Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 7 0

Log Number: 4507930Logbook(s): 

• BTLOG
• POLOG
• ELOG

Body: 

Investigated breathing motion starting at IPM1I07 as well as presumed charge buildup at 0I02.

The former remains inconclusive as it is hard to discern on the timescale of such a test (small amplitude, long period). Tried missteering in PB, no obvious effect, so probably not related to phase or cavity temperature. Could still be a magnet or Wien HVPS.

The charge buildup problem can be provoked by beam loss on A2 but is 10x smaller than observed before, not sure if due to harp retraction or other dissimilar conditions.

Log Number: 4507929Logbook(s): 

• POLOG
• ELOG

Entry Makers: brukerBody: 

Figure 1: setup as found; C beam CW with 60 uA to FC1, 5% loss on A1, 0.1% loss on A2, 15% on MS.
The presumably HWien-related issue may or may not be there (archive data says it's only 0.05 mm amplitude on IPM0I01, hardly discernible over half an hour).

To expose if something charges up at 0I02, we will create a nice shower of x-rays and secondary electrons at A2. Lowered MFX0I01 to 145, dumping 7 uA on A2.
Figure 2: This provokes the drifts and jumps.
Something is charging up in response to beam loss at A2.

Log Number: 4507927Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl01

Saved: bruker 06-02-26 21:29:30 {A:i B:1 C:3 E:1060 A=BS B=BS C=CW D=BS 0R08=0.00 0R08 dump in. A B C dump(s) in.

Log Number: 4507921Logbook(s): 

• BTLOG
• POLOG
• ELOG

Body: 

Looking at the beam orbit from the gun after the hardware work showed a slight shift of the coordinate system but not by as much as previously seen, about 200 units.
https://logbooks.jlab.org/entry/4507886

Ben learned to perform the QE scan calibration (from scratch with a new rectangle, which the procedure does not yet account for), the QE scan, and a practice spot move back and forth.
Unfortunately, the calibration run required a new corrector table for the initial guess, which I had to produce manually as the previous one was too far off.

Log Number: 4507916Logbook(s): 

• POLOG
• ELOG

Body: *New Spot* Spot Location: (13000.1,18350.4)

Laser Wavelength Atten Setting Laser Power Current HV PS Current QE PV Updated? Update Time/Reason Not Updated (nm) (W) (uA)