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FEL/LCLSII Liquid Level Alarm

Recent Log Entries
1 day 1 hour ago
Log Number: 4542154Logbook(s): Entry Makers: johnwBody: 

Call recieved around 4:40am for FEL alarm. Through investigation, we determined the issue to be the LCLSII cryomodule high level alarm. Cryo does not have write access to LCLSII channels. Attempted to contact LCLSII testing lead with no success. SRF on call was contacted and was able to change the min and max setpoint of the JT valve. The liquid level has recovered and is stable at 94%.

cryo

iCalibrate: Hall C

Recent Log Entries
1 day 1 hour ago
Log Number: 4542147Logbook(s): Body: Calibration ParametersHall:CTarget: 10cm DummyPass: 5Note: SHMS angle: -14-74Calibrated On:2026-Jul-28 02:36Calibrated By: msmithFile:C-2026-07-28_0236_10cm_Dummy_Pass-5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton
samari

SL C100 FE Scan

Recent Log Entries
1 day 3 hours ago
Log Number: 4542122Logbook(s): Entry Makers: samariBody: 

Found 3 cavities that moved the needle with a .1 MV/m step: 2L22-5 (-1.7 MV/m), 2L24-7 (-.9 MV/m), and 2L25-6 (-3 MV/m). These three reductions nearly halved the SL neutron dose for a loss of 3.9 MeV.

Once again did not change drive high, I'll let experts decide.

samari

2L14-3 Drive Line Failing?

Recent Log Entries
1 day 3 hours ago
Log Number: 4542114Logbook(s): Entry Makers: samariBody: 

Cavity started SOSing, so I attempted a quick close loop tune, but the TDOff seemed to be in a good spot. Lowered attenuator to 0, but now its creeping back up. We'll derate it and hope it stays stable.

samari

Scanned all NL C75/C100s for FE

Recent Log Entries
1 day 4 hours ago
Log Number: 4542093Logbook(s): Entry Makers: samariBody: 

Only found 2 cavities that changed the neutron dose rate at all by changing .1 MV/m: 1L10-1 and 1L23-7
Derating these cavities until they no longer moved the needle (-1 MV/m and -1.3 MV/m respectively, so total -1.4 MeV) reduced the total neutron dose across the NL by 15%.

I haven't updated DRVHs yet in case the experts would prefer the headroom

samari

iCalibrate: Hall D

Recent Log Entries
1 day 5 hours ago
Log Number: 4542066Logbook(s): Body: Calibration ParametersHall:DTarget: JD80-213 80um 0/90 degPass: 5.5Note: Calibrated On:2026-Jul-30 09:33Calibrated By: dthomasFile:D-2026-07-30_0933_JD80-213_80um_0_90_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)
msmith

Operator SIGN IN

Recent Log Entries
1 day 7 hours ago
Log Number: 4542037Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             08/13/2026
SHIFT:               Owl

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

Operator SIGN IN

Recent Log Entries
1 day 7 hours ago
Log Number: 4542034Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             08/13/2026
SHIFT:               Owl

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

Shift Information

Shift Day
CEBAF Program
MCC Crew Chief Howard
MCC Operators Price, Smith
Program Deputy Park
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