Aggregator

Log Number: 4472716Logbook(s): 

• ELOG

Entry Makers: msmithBody: 

Log Number: 4472715Logbook(s): 

• ELOG

Body: 

emergent leaks in SL; leak repairs needed at SL03 and SL04

Log Number: 4472714Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L24-7
Username: msmith
Date/Time: 02-24-26_07:03:58
RF Status: Good
Tuner Status: Good
Comment: DRVH=13.200 Neutron Dose
Previous OPS DRVH: 16.2
Special Instructions:

Log Number: 4472713Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L24-2
Username: msmith
Date/Time: 02-24-26_07:03:18
RF Status: Good
Tuner Status: Good
Comment: DRVH=13.000 Neutron Dose
Previous OPS DRVH: 14
Special Instructions:

Log Number: 4472712Logbook(s): 

• ELOG

Entry Makers: beneschBody: 

perhaps both since INX1L25 and INX1L27 jumped the most, figure 1. 1S IDXs also register, figure 2.

Log Number: 4472711Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Cav 5 was taken yesterday, Fig 2. Bypassed it shortly after as it dropped the zone out of HV again.

Strong JT responses from cavities 4 and 5.

Log Number: 4472710Logbook(s): 

• ELOG

Entry Makers: msmithBody: 

Cavity had a constant GLDER warning. OLT seems to have helped

Log Number: 4472709Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

Lowered GSET by another 0.5 to 6.5 MV/m. This is still above the Target GSET of 6.3 MV/m

Log Number: 4472708Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 3.796249

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

Log Number: 4472707Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Found VFV1L27 closed, wasn't sure why. All vac signals on the SRF screens looked okay. Plotted the surround vac signals to see and saw the noisy behavior shown in Fig 3. I figured this is what caused it to closed. Was able to open it again with no issues and it hasn't closed since, despite the noise.

Log Number: 4472705Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: Ran from opsl03

Finished after 41 iterations.

GREY: RF OFF
RATNI RED: <= 3.0 dB
GASKL RED: <1.8 V or > 2.4 V

Log Number: 4472704Logbook(s): 

• POLOG
• ELOG

Body: 

- Finished connecting 23 BPM signals to MOLLER DAQ (photo 1). These BPMs are same as used in QWeak Parity DAQ (photo 2). Remaining to do: BCM0L02 and IPM0R05.

Log Number: 4472703Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

All cavities pushed to ODVH values except

Cav-3: SOS/quench around 12. Set to 11.5MV/m

Log Number: 4472702Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

Cav-1: Pushed to the ODVH but there have been multiple Arcs and a couple quenches so I have lowered it by 0.5 MV/m
Cav-2: Pushing this cavity above ~7.0 shows a large increase in beamline vacuum. Leaving at 6.6 for now
Cav-3: Bypassed

Cav-5: GLDER warning. OLT'd
Cav-6: Pushed to the ODVH value but I lowered it to 7.0 due to frequent Arc faults.

Cav-8: Not READY in SRM by RF

Log Number: 4472701Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

All cavities pushed without much trouble. There have been a couple Arc faults in cavity 4. I am keeping an eye on wavguide vacuum 5&6. Might drop those cavities if the vacuum keeps climbing.

Log Number: 4472700Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: Ran from opsl05

Finished after 16 iterations.

GREY: RF OFF
RATNI RED: <= 3.0 dB
GASKL RED: <1.8 V or > 2.4 V

Log Number: 4472699Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
2L14-2
Username: deir
Date/Time: 02-24-26_02:07:53
RF Status: Good
Tuner Status: Good
Comment: DRVH=9.900 SOSing at higher gradients. High GASK w/ 0 RATN.
Previous OPS DRVH: 0
Special Instructions:

Log Number: 4472698Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
2L14-5
Username: deir
Date/Time: 02-24-26_01:55:52
RF Status: Good
Tuner Status: Good
Comment: DRVH=10.000 Arcing consistently at 10.2
Previous OPS DRVH: 0
Special Instructions:

Log Number: 4472696Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             02/23/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4472695Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-23-26
Time : 23:16:23
Day : Monday
Shift : Owl

Crew Chief : Deir
Program Deputy: Buttles
Team : A
Arm : RADCON
Designated SSO: Smith
LERF Operator:
Operators : Smith

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