Aggregator

Log Number: 4471983Logbook(s): 

• ELOG
• RADLOG

Entry Makers: bjacobBody: 

Log Number: 4471981Logbook(s): 

• ELOG
• RADLOG

Entry Makers: bjacobBody: 

Log Number: 4471980Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             02/19/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4471979Logbook(s): 

• CLOG
• ELOG

Entry Makers: dchriBody: 

it wasn't me

Log Number: 4471977Logbook(s): 

• CLOG
• ELOG

Entry Makers: johnwBody: 

SC1R was tripped intentionally to support 2L25 U-Tube operations today at around 8:30. We will be pumping down shortly afterwards.

Log Number: 4471976Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Inj500KeV
User: dchri

Log Number: 4471974Logbook(s): 

• ELOG

Body: 

MQPAA25 Replaced yesterday.
Supply was tested and cycled.
Closing JLab-PTW-9923

- Kissinger, Banks

Log Number: 4471973Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-19-26
Time : 07:27:54
Day : Thursday
Shift : Day

Crew Chief : Blackshaw
Program Deputy: Buttles
Team : E
Arm : RadCon
Designated SSO: Janak
LERF Operator:
Operators : Janak

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

Log Number: 4471972Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned off for:
R02
R03
R04
R12
R13
R14
R15
R16
R17
R18
R19
R1A
R1B
R1C
R1D
R1E
R1F
R1G
R1H
R1I
R1J
R1K
R1L
R1M
R1N
R1O
R1P
R1Q

Log Number: 4471971Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned off for:
R22
R23
R24
R25
R26
R27
R28
R29
R2A
R2B
R2C
R2D
R2E
R2F
R2G
R2H
R2I
R2J
R2K
R2L
R2M
R2N
R2O
R2P
R2Q

Log Number: 4471970Logbook(s): 

• ELOG

Body: 

Note that Cryo is coming in to stab u-tubes between 830 and 930 followed by S&A. I think we should fit the V blocks in between Cryo and S&A.

Log Number: 4471969Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: dchriBody: 

Cavity had trouble coming up. OLT and letting it rest at 11.5 MV/m (drive high 12 MV/m)

Log Number: 4471968Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 2.004467

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

Log Number: 4471966Logbook(s): 

• ELOG

Tags: 

• Autolog

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

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

Log Number: 4471965Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Except for 1L14, which has all cavitied marked Not Ready in SRM.

Log Number: 4471964Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L07-4
Username: kprice
Date/Time: 02-19-26_06:18:31
RF Status: Good
Tuner Status: Good
Comment: C100 Bypassed - Not ready in SRM, preventing accidental turn-on
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4471963Logbook(s): 

• POLOG
• ELOG

Body: 

- Found that we mislabeled two cables from UVA RTP HV Driver in Nov 2024; fixed labeling.

Log Number: 4471962Logbook(s): 

• ELOG

Body: 

Measurements for troublesome zone 1L10, minus cavity 8 (bypassed): https://logbooks.jlab.org/entry/4471961
This zone would likely benefit from some pulse processing/further conditioning. It looked like some of the FE was reducing over time.

Log Number: 4471961Logbook(s): 

• SRFPLASMA
• SRFLOG
• ELOG

Entry Makers: kpriceBody: 

Cavity 1 - Took data twice, first file is probably junk. Cavity seemed to be struggling to tune, but there wasn't much improvement the second time. Started at ~10 MV/m, Decarad 1 ~8000.

Cavity 2 - Had some trouble ramping gradient. Discriminator wanders quite a lot when any change is made.

Log Number: 4471960Logbook(s): 

• ELOG

Body: 

Swing shift took measurements for 1L05 and 1L25:
1L05: https://logbooks.jlab.org/entry/4471928
1L25: https://logbooks.jlab.org/entry/4471931