Aggregator

Log Number: 4405523Logbook(s): 

• ELOG

Body: 

PSS Video System upgrade: measurements taken in Injector Service Building to estimate length for power cables.

Log Number: 4405521Logbook(s): 

• ELOG
• RFLOG

Body: 

All RF work is completed and recovered by 3.50pm

Summary

1L02-4 cavity recovery +3.8MeV
1L02-7 RFCM change +4MeV
1L09-5 HV work for cavity recovery +12.6MeV
1L12-6 HV work to recovery , Could not turn on to RF
1L13-7 50 ohm resister replaced +5.4 MeV
1L18-HV troubleshoot and zone recovery
1L25-6 FCC change out +9.1MeV

2L12-4 HV work for cavity recovery,Further TS needed
2L13-5 recovery +2MeV

Separator troubleshooting https://logbooks.jlab.org/entry/4405460

NL gain +34.9 MeV
SL gain +2MeV

Log Number: 4405520Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-25-25
Time : 15:43:00
Day : Wednesday
Shift : Swing

Crew Chief : Forman
Program Deputy: Nissen
Team : F
Arm : Chaudhary
Designated SSO: Janak
LERF Operator:
Operators : Anthony, Chaudhary, Janak

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

Log Number: 4405518Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam off to halls.

Log Number: 4405517Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 5 0

Log Number: 4405511Logbook(s): 

• ELOG

Body: 

Replaced SCE power supply for MQP5C10 as readbacks were still fluctuating. Will continue to monitor closely. Will more than likely need to check magnet connections in the tunnel next opportunity. OPS restored setpoint and cycled supply.
-Thornton, Crespo

Log Number: 4405509Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2025-06-25 15:17:32 The output from the myRestore execution was as follows: iocsoftw3spce systemEnum@2025-06-25 15:17 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 Procedure return status: Success

Log Number: 4405507Logbook(s): 

• ELOG

Entry Makers: samariBody: 

The RF heat load for 1L09-5 at 18 MV/m seems to have swung the NL pressure and dropped the heat margin considerably.

Log Number: 4405504Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

MQK5C05
MQK5C06
MQK5C06A
MQK5C07
MQP5C08
MQP5C09
MQP5C10
MQP5C11
MQPAD00

The following magnets were REMOVED from the CYCLING LIST by the user:
MQK5C05
MQK5C06
MQK5C06A
MQK5C07
MQP5C08
MQP5C09
Total Time: 3.017 mins

Log Number: 4405503Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

6/18/25 - Moller beam studies ATLis 116856 and 116768.

6/20/25 - Received OPS-PR related to GMES Alarms. This was deferred by S. Zhang to LLRF.

6/23-25 - Reached out to CIS for requests on Beam studies scheduled for Wed 6/25/25. Amy Sy coordinated PD directly to coordinate degrader commissioning studies (BSList 113987 and 116801). M. Stutzman coordinated directly with PD Hall B slit movement studies (ATLIs 116287).

6/25/25 - Beam studies ongoing. In addtion to those mentioed above: MOLLER beam studies (BSList 117024 by R.

Log Number: 4405502Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Cavity recovered without problem. Looks like the cavity was detuned 95 degrees when gradient ramped to fast and tripped the cavity with 7 kw CRFP. 7kw is a lot of energy to throw into an untuned cavity to fast. and it will usually trip the cavity and RF script will try to turn it back on seconds afterwards and trip it again. These high gradient cavities need to be walked up slowly if they continue to drop out with this much CRFP and the tuners should not exceed 30 degrees or less when it is being walked up manually !!

Log Number: 4405499Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl02

Saved: bruker 06-25-25 14:54:15 {A:5 B:5 C:5 E:1060 A=Tune B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4405497Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L06-4
Username: kerns
Date/Time: 06-25-25_14:48:49
RF Status: Good
Tuner Status: Good
Comment: Recovered to ODVH=12.8 Mv/m after GSET 0 for erroneous GMES, CRFP. and power.
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4405496Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-5
Username: latshaw
Date/Time: 06-25-25_14:44:32
RF Status: Good
Tuner Status: Good
Comment: handed over to ops
Special Instructions: backlash present, allow extra time for tuning. bypass if it gives too many issues.

Maintenance Tag: Component: Other body current high

Log Number: 4405495Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-5
Username: latshaw
Date/Time: 06-25-25_14:43:30
RF Status: Bad
Tuner Status: Good
Comment: C75 Bypassed - Body Current High Fault Dropping Zone out of HV.
Special Instructions: backlash present, allow extra time for tuning. bypass if it gives too many issues.

Maintenance Tag:

Log Number: 4405490Logbook(s): 

• ELOG

Body: 

Channels: R195TDISC, R195GLOS

1L09-5 was recovered today by the RF team. In bringing back this cavity to reference we noticed that there was some bad backlash.

We leveraged Tom's idea of moving the motrs back and forth by a few kHz until the backlash seems to get better.

This helped the backlash get better but it is still present.

Log Number: 4405489Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L13-7
Username: kerns
Date/Time: 06-25-25_14:30:12
RF Status: Good
Tuner Status: Good
Comment: Recovered and optimized RF to ODVH=10.9 Mv/m after 50 ohm resistor replaced.
Special Instructions:

Maintenance Tag: Component: 50 Ohm Resistor

Log Number: 4405486Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl04
Data from: /usr/opdata/burt/allsnap/06-25-25_06:52:31
Restored file: /tmp/06-25-25_14:22:22.snap
files: ARC1quad.snap ARC1corr.snap HALLAmoel.snap HALLAion.snap HALLDcorr.snap SpinControls.snap ARC2quad.snap HALLDbend.snap ARCAcorr.snap ARC6quad.snap ARC3bend.snap ARC2bend.snap HALLAquad.snap NLquad.snap HALLBbend.snap ARC7corr.snap ARC5bend.snap MMSconfig.snap ARC9bend.snap Scam2Board.snap HALLAcorr.snap ARC9quad.snap ARC4corr.snap HALLApola.snap SLcorr.snap ARC4bend.snap HALLCbend.snap HALLBcorr.snap ARCAquad.snap SLquad.snap INJ5Dspect.snap MAGloop.snap HALLA

Log Number: 4405485Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl04

Saved: samari 06-25-25 14:22:08 {A:5 B:5 C:5 E:1060 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.

Log Number: 4405484Logbook(s): 

• ELOG

Body: 

Check magnet output connections in connector of magnet output cable, and inside the supply itself for the following SCE's:
MQP5C10- Found loose connections in both locations. Tightened and will continue to monitor current/voltage readback until later today. Leaving PTW-7785 open for now.
MQR2C08- Found nothing loose. Will check magnet connections inside the tunnel at next opportunity.
MQKAR06- Found loose connections inside the supply.