Aggregator

Log Number: 4471997Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: Event/action ID: 3 [mod.type.prop.ioc.macaddress]
Deployment: ced
Workspace: ops
Changes:
iocpcarcfld2.macaddress

Log Number: 4471996Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value RHWPpsub_pl_ipos50080002505500500

Log Number: 4471994Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: Event/action ID: 3 [mod.type.prop.ioc.macaddress]
Deployment: ced
Workspace: ops
Changes:
iocpcarcfld2.macaddress

Log Number: 4471992Logbook(s): 

• POLOG
• ELOG

Entry Makers: gramesBody: 

I was using StepNGraph v3-4 (ops) from JMenu fig 1and during a scan of psub_pl_ipos (rotatable waveplate stepper motor) the app threw the error in fig 2, stopped running.

Tried to abort, did not work.

Pressed Quit, then it aborted and asked to restore values, which I acknowledged, and that worked.

Log Number: 4471991Logbook(s): 

• CLOG
• ELOG

Entry Makers: johnwBody: 

2L25 U-Tubes are complete with no issues. We will be pumping down shortly.

Log Number: 4471990Logbook(s): 

• ELOG

Body: 

Not sure why approval comment didn't go in. PTW on-issue. Looks good. Added to today's work map and SAM Cal.

Log Number: 4471989Logbook(s): 

• ELOG

Body: 

If Hall C WC is OK with this, looks fine to me once the PTW is on-issue.

Log Number: 4471988Logbook(s): 

• ELOG

Body: 

Log Number: 4471986Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  PD SUMMARY

CIS: -BNL/KEK visit measured Hall A polarization ~88%.

Log Number: 4471985Logbook(s): 

• ELOG

Body: 

Measurement performed once more, but only tested cav 2 & 5 due to time constraints

More details in the ELog https://logbooks.jlab.org/entry/4471984

Difference is setpoints in Requested Heat & LEM RF Heat,
Allowed Requested Heat to reach setpoint & allowed JT to settle before adjusting LEM RF Heat from 120 --> 80W (arbitrary)

Cavity 2 when turned off had a Low JT of ~76%

Cavity 5 had a Low JT of ~71%

Cav 2 dropped JT by 2% to 5% (typical-ish)

Cav 5 dropped JT by 5% to 8% (unusually high reduction)

Between yesterday's measurement and today's;
Cav 5 seems to be the most problematic cavity

Log Number: 4471984Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: dchriBody: 

ATLis https://tasklists.jlab.org/atlis/tasks/119484

Investigating the high heat load in 1L06

Perform same measurement as on Feb 18th 2026 (see linked ELog)
Difference is setpoints in Requested Heat & LEM RF Heat,
Allowed Requested Heat to reach setpoint & allowed JT to settle
before adjusting LEM RF Heat from 120 --> 80W (arbitrary)

Initial JT parameters:
Sample Time = 120
Max Position = 85

Initial Heater parameters:
Requested Heat Watts = 165
LEM Requested RF Heat = 100

STEPS:
1. Reduce ST (JT sample time) to 30s
2. Raise Max Pos to 90%
3. Raise heater 'REQ HEAT WATTS' to 80W
4.

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