Aggregator

Log Number: 4472956Logbook(s): 

• ELOG
• INCLOG

Body: 

Plugged in cables for VPG2L26A & B, VCG2L26 and the valve position indicator for VBV2L26A downstairs in preparation for after neg pump is activated and girder has been pumped down overnight.

Log Number: 4472954Logbook(s): 

• POLOG
• ELOG

Entry Makers: brukerBody: 

Quiet week, no calls, few emergent issues.

Photocathode and laser health:
Figure 1: QE measurements. Reason for jumps unclear, could be related to x/y stage reproducibility (performed QE scan w/ homing) and/or unexplained motion of the laser itself.
Figure 2: extinction ratio data, no values below 1000, unremarkable.

Beam studies and laser table measurements:
- BSList #118932: measured BPM spectrum at IPM0L03 as a function of time, hoping to see a correlation with BCM heater jacket.

Log Number: 4472953Logbook(s): 

• POLOG
• ELOG

Entry Makers: brukerBody: 

The errors in the TMG waveform measurement are a result of the scope not getting beam sync triggers.
Figure 1: blue trace showing constant 5 V on beam sync input.
So the cable is connected, but the distribution chassis isn't sending me any pulses. I will come back with a scope later today and trace the signal.

Log Number: 4472951Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-25-26
Time : 09:32:30
Day : Wednesday
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: 4472949Logbook(s): 

• ELOG

Body: 

Please coordinate with each Control Room prior to beginning.

Log Number: 4472947Logbook(s): 

• ELOG

Body: 

CRU stands for Computer Room Unit, the only space that will be affected are Hall A, B and C control rooms in the CH. The PM's will be done in two stages, combined down time of less than two hours per system.

Log Number: 4472945Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

Since the UVA RTP HV Driver is the hot spare, these are the instructions on how to back-out of JLab RTP HV Driver installation and go back to the UVA driver:

1. Turn off the JLab RTP Driver from the control screen and unplug the power from the front of the driver boxes.
2. Disconnect the JLab HV Driver cables to the RTP crystals. These are 6 cables.
3. Reconnect RTP crystals cables to UVA driver. These are 5 cables - UVA has only one common ground cable labeled "33".
4. Unplug Hel Flip fiber from JLab driver and send it back to the IA driver instead of the nHel Flip fiber.

Log Number: 4472943Logbook(s): 

• ELOG

Body: 

Forgive my ignorance, what is a CRU?

What spaces will be affected -- just Hall A, B, C counting house control rooms, one at a time? Additional areas?

What's the estimate for how long a single outage will take?

With answers to the above, only remaining item is to ensure Hall work coordinators also approve.

Log Number: 4472942Logbook(s): 

• ELOG
• RADLOG

Entry Makers: dthomasBody: 

Log Number: 4472941Logbook(s): 

• ELOG

Body: 

PTW on-issue. Looks good. Approved. Can occur whenever convenient. Don't anticipate interference with other jobs, but if there is give those right-of-way.

Log Number: 4472939Logbook(s): 

• ELOG

Entry Makers: mockBody: 

https://tasklists.jlab.org/bslist/tasks/119492

Log Number: 4472938Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: mock 02-25-26 08:30:29 {A:5 B:3 C:1 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4472937Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  PD SUMMARY

Injector: Shifted gradient around in attempts to bring 0L04-8 (E-lock) into stable operating range. 

Log Number: 4472936Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Inj500KeV
User: mock

Log Number: 4472935Logbook(s): 

• ELOG

Entry Makers: dthomasBody: 

Log Number: 4472934Logbook(s): 

• ELOG

Body: 

Commissioning of the system was completed Tuesday 2-24-26. There will be some warmer weather (higher load) commissioning work scheduled during warmer conditions that will allow more chillers and pumps to be operated.

Log Number: 4472932Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-02-25 08:08:54 The output from the myRestore execution was as follows: iochdmag magnet_ioc magnet_MAG@2026-02-25 08:08 8(8) restored Pause: 2 second(s) magnet_HVAL@2026-02-25 08:08 2(2) restored Pause: 2 second(s) magnet_LOOP@2026-02-25 08:08 2(2) restored Pause: 2 second(s) magnet_CMPQ@2026-02-25 08:08 4(4) restored magnet_TrimRack@2026-02-25 08:08 0(0) restored Procedure return status: Success hdmag@2026-02-25 08:08 2(2) restored systemEnum@2026-02-

Log Number: 4472931Logbook(s): 

• ELOG
• RADLOG

Entry Makers: dthomasBody: 

Log Number: 4472930Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             02/25/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4472926Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-25-26
Time : 07:22:48
Day : Wednesday
Shift : Day

Crew Chief : Mock
Program Deputy: Buttles
Team : B
Arm : RADCON
Designated SSO: Thomas
LERF Operator:
Operators : Thomas

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