Aggregator

Log Number: 4490355Logbook(s): 

• ELOG
• SRFLOG

Body: 

Found software problem that was causing faulty Gradient calculations.
verifying gradients for 4 cavities.
Cavity 2 reached 24 MV/m but the usable gradient is set to 18 MV/m due to warm window heating heavy FE starting at ~16 MV/m
Cavity 1 reached 24 MV/m with one hour run completed at 24 MV/m mild FE starting at ~ 18 MV/m
Cavity 3 reached 20.7 MV/m (quench limited) with heavy FE starting at ~9.8 MV/m

Log Number: 4490354Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06
Data from: /usr/opdata/burt/allsnap/04-20-26_20:39:06
Restored file: /tmp/04-21-26_21:47:30.snap

Log Number: 4490353Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06
Data from: /usr/opdata/burt/allsnap/04-20-26_20:39:06
Restored file: /tmp/04-21-26_21:45:10.snap

Log Number: 4490352Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06

Saved: ywang 04-21-26 21:41:32 {A:i B:3 C:2 E:345 A=CW B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4490351Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: lrichard
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
IL

Log Number: 4490350Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: lrichard
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T

Log Number: 4490349Logbook(s): 

• POLOG
• HCLOG
• MOTTLOG
• ELOG

Entry Makers: brukerBody: 

Set up Mott at p=5.5 MeV/c according to #4473570.
Did some troubleshooting of detector signals in the ISB, see #4490328.
Asymmetry measurements follow.

Run 10168: C laser, IHWP OUT, HWien -51 deg
Mott Asym UD (%) = -26.8327 +/- 0.252364
Mott Asym LR (%) = 1.16502 +/- 0.262756

Run 10169: C laser, IHWP IN, HWien -51 deg
Mott Asym UD (%) = 26.7997 +/- 0.255227
Mott Asym LR (%) = -1.8542 +/- 0.266238

Run 10170: C laser, IHWP OUT, HWien -90 deg
Mott Asym UD (%) = -34.8933 +/- 0.252753
Mott Asym LR (%) = 1.57972 +/- 0.27298

Run 10171: C laser, IHWP IN, HWien -90 deg

Log Number: 4490346Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06
Data from: /usr/opdata/burt/allsnap/04-20-26_22:03:48
Restored file: /tmp/04-21-26_20:51:00.snap

Log Number: 4490345Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06
Data from: /usr/opdata/burt/allsnap/04-20-26_22:03:48
Restored file: /tmp/04-21-26_20:48:07.snap

Log Number: 4490344Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-21 20:41:02 The output from the myRestore execution was as follows: iocsoftw3spce systemEnum@2026-04-21 20:41 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: 4490342Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03
Data from: /usr/opdata/burt/allsnap/04-21-26_18:01:27
Restored file: /tmp/04-21-26_20:41:53.snap

Log Number: 4490341Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: bruker 04-21-26 20:41:21 {A:i B:3 C:2 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4490328Logbook(s): 

• POLOG
• MOTTLOG
• ELOG

Entry Makers: gramessuleimanbrukerBody: 

The MeV-Mott is working again.

Tonight we investigated why the Mott "delta-down" counter indicated low rate, where the "delta" part helps us distinguish e- from the photon background. We began by intercepting the raw delta signals from each of the four detectors to a scope, and traces appeared normal. Next, we moved to the end of the hardwired processing just prior to the FADC board, and again traces appeared normal. After convincing ourselves this was reproducible, we ran the DAQ locally and interesting the ~bad "delta-down" was fine and the "delta-up" detector showed a problem.

Log Number: 4490326Logbook(s): 

• ELOG
• SRFLOG

Body: 

MYBBS06
- 9S and BS Vacuum lines reconnected
- Pumping with pump cart overnight
- Leak check passed
- Start ion pumps tomorrow

2L12
- Swapped scroll pump for ins. vac

2L03, 2L25
- Bellows covers installed on adjacent girder bellows
- Valve position indicator plastic triggers replaced with metal ones

Log Number: 4490311Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-21-26
Time : 18:46:03
Day : Tuesday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Ogur
Team : X
Arm : RADCON
Designated SSO: Anthony
LERF Operator:
Operators : Anthony

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

Log Number: 4490307Logbook(s): 

• BTLOG
• ELOG
• POLOG

Body: 

Summary of today's Day Shift beam studies:

https://logbooks.jlab.org/entry/4490060

Log Number: 4490306Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: bruker 04-21-26 18:01:27 {A:i B:3 C:2 E:345 A=Pulse B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4490305Logbook(s): 

• BTLOG
• ELOG

Entry Makers: bschaumlBody: 

Attempted to set up for BSList 119067 and found that IBC0L02 doesn't respond as expected at the specified gain settings. As pictured in Fig. 4 we ran 10+ uA to FC2 and did not get a substantial enough change in the counts to use it as a current limiting device. SMEs decided to punt on this preliminary study until they could take a closer look at this BCM. Handing off to the Mott study now.

Log Number: 4490304Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Monday April 20 through 18:00 Tuesday April 21 AES DC power Systems Investigate MAT1L22H

2026-04-21 10:04 - Mark Kissinger

Attached pictures of M

Log Number: 4490302Logbook(s): 

• POLOG
• ELOG

Entry Makers: brukerBody: 

I've been thinking about what might need to happen to accommodate the divergent beam from the HWien if we used the spin flipper to make a beam size minimum in the HWien.

I don't have a good intuition for the problem because the beam line schematic is not to scale, so it's GPT time.
It turns out I was totally wrong about how the beam needs to go through A3 and A4 (when I logged #4473696 on Mar 1). What actually has to happen for the injector to work as built, regardless of beam envelope in the Wien filters, is to produce a beam size maximum halfway between A3 and A4, at MFX0I07.