Aggregator

Low Energy Set up

23 hours 32 minutes ago
Log Number: 4470393Logbook(s): Entry Makers: samariBody: 

We can reliably get 50 uA CW to the ILD with the low energy set up (V=0, no flip, H=10.5 degrees) after some optics tweaking in 0L. Once the ced workspace is back up we'll be able to do an 0R match.
I was able to calibrate orbit locks and get them going as well as the energy lock with some investigation. Transmission is >.95 for all lasers, and B (fig 2) and D's (fig 3) relative orbit looks good. The current pain point is BLM trips. ILM0L02 cannot be lowered from what I've tried, and I had to result to a very low orbit vertically in 0R to lower BLMs.

samari

Gradient ramp of 1L14 complete

23 hours 53 minutes ago
Log Number: 4470392Logbook(s): Entry Makers: anthonyBody: 

Cavities came up without much incident. Cavities 5 and 6 not so smooth as the others. I was able to achieve the ODVH for cavity 5, but long term stability at that gradient remains dubious. Cavity 6 I left at 11.0. It was quenching at 11.5. I kept lowering by 0.1 and was still quenching at 11.2 The cavity had been quiet at 11.0 so I just set it back to 11.0.
Spreadsheet has been updated.

anthony

BEM momentum oddity

1 day 1 hour ago
Log Number: 4470382Logbook(s): Entry Makers: samariBody: 

I couldn't turn on the 0R energy lock without it railing energy upwards even after setting BNOMs. Went to the BEM screen and saw that it believed the momentum to be -2577 MeV. Reconfiguring BEM worked to correct the energy, but the lock would still rail. I dialled in a 3e-4 dp/p offset based on average value and the lock now works.

samari

COMMENT ON Troubleshoot North Access Cooling Tower Pump Controls

1 day 2 hours ago
Log Number: 4470372Logbook(s): Body: 

Problem not yet resolved. Honeywell tech is consulting his technical support. The control program may need to be reloaded or the controller power cycled. Either action will require all critical equipment controlled to be switched to manual operation during the process. This includes the North LINAC and West ARC LCW Systems in addition to the North Access Cooling Tower pumps and fans. Technician should return either next Tuesday (2-17-26) or Wednesday (2-18-26).

jonesc

CW beam setup to ILD explained

1 day 2 hours ago
Log Number: 4470366Logbook(s): Entry Makers: kazimiSamariBody: 

For low energy injector setup, the beam at viewers after full cryomodule (0L08 and 0L10 and chicane) did not look correct. Harp scan were also not normal (see pervious logs). We have asked D. Turner to repair the setup_345 CED workspace. Meanwhile, by imperically changing the quads at 0L04 and 0L05, we can get a beam that can transfer to the end of the chicane with acceptable beam spots. CW beam up to 45uA was sent to ILD. We suspect the problem is the very low energy beam and the lack of Rf focusing in the second full module.

kazimi

Attempting to modify MQJ0L04,5 to fix low energy optics visually

1 day 2 hours ago
Log Number: 4470363Logbook(s): Entry Makers: samariBody: 

The first viewer walk is as found on design with the 0L match previously applied. I first changed the MQJ0L04 matching quad from 51.2 to 0 Gauss to minimize the spot at 0L08 (second viewer walk), Then adjusted the MQJ0L05 LEMi quad from -27 to -127 to round the spot at 0R05 (third viewer walk). This was completely empirical based on viewers with the input of Injector and CASA SMEs.

samari

iocsoftrffeonset restored

1 day 2 hours ago
Log Number: 4470362Logbook(s): Tags: Body: restorelib 3.0.1 Target restore date was 2026-02-12 18:02:09 The output from the myRestore execution was as follows: iocsoftrffeonset systemEnum@2026-02-12 18:02 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftrffeonset (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success
alarms

MOLLER Install Update 02/12/2026

1 day 2 hours ago
Log Number: 4470359Logbook(s): Tags: Entry Makers: jonesgaskelldwinesdougberdnikciprianBody: 

Continued with removal, of signal cables along blue utility platform. Hall A techs prepared documentation, for up coming tasks. Techs also removed items from hall to physics storage to gain floor space for upcoming work..

lhurt

COMMENT ON RF work for 2026 HCO

1 day 4 hours ago
Log Number: 4470345Logbook(s): Body: 

Found the 24vdc supplies that provide Door Interlocks on both NL24 and NL25 bad and need replaced tomorrow when I get a PTW. Will coordinate with PSS to temporarily remove their PSS lock so I can test before zone cert.

kerns

Operator SIGN IN

1 day 4 hours ago
Log Number: 4470340Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Anthony
DATE:             02/12/2026
SHIFT:               Swing

The operator has read the following:
  • ELOG
  • PD Shift Plan
  • Radiation Surveys for PSS Segments in Controlled Access
  • PSS Log
anthony

Vacuum Group Summary 2026-02-12

1 day 5 hours ago
Log Number: 4470336Logbook(s): Body: 

2L03
- 2L04 girder NEG activated, gate valve opened
- Clean rooms removed

2L25
- 2nd C100 girder for 2L26 baked out
- C100 girders ready for setting in resting locations tomorrow

BSY
- 2C Line final leak check passed
- Ion pumps on, pumping down
- Turbo pump cart valved out, will be removed tomorrow

duzik

CREW CHIEF SIGN IN

1 day 5 hours ago
Log Number: 4470333Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 02-12-26
Time : 15:22:40
Day : Thursday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Buttles
Team : X
Arm : RADCON
Designated SSO: Anthony
LERF Operator:
Operators : Anthony

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

Shift Information

Shift Swing
CEBAF Program
MCC Crew Chief Forman
MCC Operators Anthony
Program Deputy Buttles
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