Aggregator

Autolog save

19 hours 20 minutes ago
Log Number: 4507959Logbook(s): Tags: 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.
samari

Autolog save

21 hours 1 minute ago
Log Number: 4507947Logbook(s): Tags: 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.
samari

iocse15 restored

21 hours 2 minutes ago
Log Number: 4507946Logbook(s): Tags: 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
alarms

Operator SIGN IN

21 hours 22 minutes ago
Log Number: 4507944Logbook(s): 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
shriner

CREW CHIEF SIGN IN

22 hours 10 minutes ago
Log Number: 4507939Logbook(s): 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:
deir

Comm alarm on MXV4R04

22 hours 16 minutes ago
Log Number: 4507938Logbook(s): 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.

anthony

PARTIALLY COMPLETED Investigate sources of beam motion at HWien and 0I02

23 hours 24 minutes ago
Log Number: 4507930Logbook(s): 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.

bruker

BSList #120360: beam motion investigation

23 hours 30 minutes ago
Log Number: 4507929Logbook(s): 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.

bruker

Autolog save

23 hours 54 minutes ago
Log Number: 4507927Logbook(s): Tags: 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.
bruker

COMPLETED Beam QE scan and Spot Move

1 day ago
Log Number: 4507921Logbook(s): 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.

bruker

QE Measurement

1 day 1 hour ago
Log Number: 4507916Logbook(s): 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)
bschauml

Shift Information

Shift Swing
CEBAF Program
MCC Crew Chief Forman
MCC Operators Anthony
Program Deputy Moser
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Recent PSS History

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