Aggregator

Log Number: 4472364Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03
Data from: /usr/opdata/burt/allsnap/02-20-26_09:09:09
Restored file: /tmp/02-21-26_10:45:31.snap

Log Number: 4472363Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl03

Saved: dthomas 02-21-26 10:45:17 {A:5 B:3 C:1 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.

Log Number: 4472361Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             02/21/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4472358Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-21-26
Time : 07:16:20
Day : Saturday
Shift : Day

Crew Chief : Humphry
Program Deputy: Buttles
Team : X
Arm : radCon
Designated SSO: Thomas
LERF Operator:
Operators : Thomas

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

Log Number: 4472357Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Log Number: 4472356Logbook(s): 

• ELOG

Body: 

Zones checked out by Ops:
2L08: https://logbooks.jlab.org/entry/4472349
2L12: https://logbooks.jlab.org/entry/4472346
2L18: https://logbooks.jlab.org/entry/4472350

Zones ramped to ODVH:
2L06: https://logbooks.jlab.org/entry/4472336
2L10: https://logbooks.jlab.org/entry/4472341
2L11: https://logbooks.jlab.org/entry/4472351
2L14: https://logbooks.jlab.org/entry/4472352
2L15: https://logbooks.jlab.org/entry/4472344
2L16: https://logbooks.jlab.org/entry/4472343
2L17: https://logbooks.jlab.org/entry/4472340
2L19: https://logbooks.jlab.org/entry/4472338
2L20: https://logbooks.jlab.org/entry/4472337

Log Number: 4472355Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 2.4364470000000003

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

Log Number: 4472353Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: msmith
Areas: Injector

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09

Log Number: 4472352Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: deirBody: 

Only cavity 1 is at the ODVH.

Cavity 5 was marked Not Ready in SRM. Recovered at 4 MV/m and upgraded to Checked.

Cavity 3 started to SOS above 9.5 MV/m. Tried tuning it, did not help. RATN is currently sitting at 1. Reduced GSET to 9.0 MV/m.

Set LEM REQ Heat to 80W.

Log Number: 4472351Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: deirBody: 

All except Cav 2 at ODVH. Strong response in WG vac if I push it further. Will give it a day to sit.

Log Number: 4472350Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: deirBody: 

Found cavities 3, 4, 7 at 0 GSET but no log references. Cav History shows RF good, so I recovered them.

LEM REQ Heat set to 30 W.

Updating SRM.

Log Number: 4472349Logbook(s): 

• ELOG

Entry Makers: deirBody: 

On and soaking at 4 MV/m. Updating SRM.

Cav 8 had a recent RFCM swap. Attempted OLT but GMES and PMES became unstable with loops closed. Ops-PR'd.

Log Number: 4472348Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been GSET 0:
2L08-8
Username: deir
Date/Time: 02-21-26_05:54:51
RF Status: Bad
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - Unstable GMES & PMES
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4472347Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: deirBody: 

Attempted to recover w/ OLT. Upon leaving expert mode, PMES/GMES highly unstable. Goin to GSET0 for now until SME can take a look.

Log Number: 4472346Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: deirBody: 

I mistakenly thought this zone had already gone through the initial HCO. After checking SRM, it has not. Reduced gradients to 4 MV/m per cavity and adjusted LEM Heat accordingly. Updating SRM.

Also noteworthy...I was able to recover Cav 1 without issue. RFCM was replaced on 2/17.

Log Number: 4472345Logbook(s): 

• CLOG
• ELOG
• RFLOG
• SRFLOG

Entry Makers: deirBody: 

Soaking at ODVH. LEM Req Heat set to 80W. Will adjust when zone is lowered to Target GSets.

Log Number: 4472344Logbook(s): 

• CLOG
• ELOG
• RFLOG
• SRFLOG

Entry Makers: deirBody: 

Currently soaking at ODVH's. Checked a hypothetical LEM for the calculated gradients and LEM REQ Heat values. LEM's calculation had the zone pushed to its ODVHs, so the LEM REQ Heat value was accurate.

Will adjust LEM Heat when the zone is dropped to Target GSets.

Log Number: 4472343Logbook(s): 

• SRFLOG
• CLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

Cav-4: I brought this up to the 8 MV/m ODVH value but noticed a KMAI warning. Lowered to 7 for now (Fig.3)
Cav-5: CWVF faults when over 7.5 MV/m (Fig.4). Leaving at 6.5 for now

Log Number: 4472342Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: Ran from opsl05

Finished after 39 iterations.

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

Log Number: 4472341Logbook(s): 

• CLOG
• ELOG
• RFLOG
• SRFLOG

Entry Makers: deirBody: 

Letting zone sit at ODVH for the rest of the shift. Compared current GSETs to a hypothetical LEM. LEM wants to set them a bit lower than the ODVH with a 42 W LEM REQ RF Heat. For the time being I have set LEM REQ RF Heat to 50W.

The archiver value is unreliable as we had all but cavity 3 online at the end of the last run. Currently half the zone is bypassed.