Aggregator

Log Number: 4543783Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

Log Number: 4543782Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Cavity 1: Started at 21 MV/m without quenching. Missed the "config decarad" step...aborted and started again at 21 MV/m.
Cavity 2: Quench >18.9.
Cavity 3: Started at 21 MV/m without quenching.
Cavity 4: Quench >12.7
Cavity 5: Started at 21 MV/m without quenching.
Cavity 6: Quenches above 20.6 MV/m.
Cavity 7: unable to raise gradient much above 20 despite increasing GLOS. Starting at 20 MV/m.
Cavity 8: Started at 24 MV/m

Log Number: 4543780Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             08/20/2026
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4543776Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Cavity 1: Started at 21 MV/m without quenching.
Cavity 2: Started at 21 MV/m without quenching.
Cavity 3: Cavity quenches above 19.7 MV/m (GLOS=3.75)
Cavity 4: Started at 21 MV/m without quenching. Field emission < 10 mRem/h
Cavity 5: Started at 21 MV/m without quenching.
Cavity 6: Started at 21 MV/m without quenching. Field emission < 10 mRem/h
Cavity 7: Started at 21 MV/m without quenching. Downstream vacuum valves closed. Restarted at 20.5 MV/m to completion
Cavity 8: Started at 21 MV/m without quenching.

Log Number: 4543775Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Not sure if this related to 2L03-8 modanode voltage. Ops-PRd for tracking. Moving on to 2L05 for FE Onset.

Log Number: 4543774Logbook(s): 

• ELOG
• RFLOG

Entry Makers: eformanBody: 

Attempting to run FE measurement on 2L03 but zone trips out of HV on body current.

Log Number: 4543773Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Bypassing so we can continue FE Onset.

Log Number: 4543770Logbook(s): 

• ELOG
• SRFPLASMA

Body: 

Set up DecaRads on 2L03, 2L05, 2L23 & 2L24.
Pulled DecaRad setups from 1L24 & 1L25.

All chs on all systems read normal background counts after set up.

Measured bias voltage of each chassis locally, to ensure a no-load bias of 0.5v, +/- .005.
Only the 2L24 bias was low; adjusted from 0.483v locally, to 0.510, and back to 0.500.
During this time, ch.10 inexplicably jumped to 6000+ cps, but that is likely just noise from turning the biasing pot.

The Epics readbacks all have slight offsets, but, assuming the channels are still linear, it's likely that the change in voltage, from unloaded tubes

Log Number: 4543769Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Tuesday August 18 through 18:00 Wednesday August 19 AES RF Systems Perform rfMiram12GeV 1-0

2026-08-19 10:08 - Xavier Gomez

Would like to include

Log Number: 4543768Logbook(s): 

• ELOG

Body: 

Running FE Onset measurements on 2L03, 2L05, 2L23, 2L24

Log Number: 4543767Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Log Number: 4543766Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Everything working as expected, v3.0 will be released soon.

Log Number: 4543764Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s

Log Number: 4543762Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AT SETPOINT 2 by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s

Log Number: 4543761Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s

Log Number: 4543756Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AT SETPOINT 2 by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s

Log Number: 4543755Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Planning on running FE Onset over the night

Log Number: 4543754Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

DecaRad move complete

Log Number: 4543753Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s

Log Number: 4543751Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version dvl of the Box Supply Cycling Script:
LAM1C Ramp Rate = 8.649 A/s