Aggregator
2L03 Commissioning Swing Shift
Cryomodule commissioning: completed 1-hour runs on cavity 5 and 6, some work on cavity 7 and 3
Cavity 5:
Q_FPC = 1.67e7, Q_FP = 2.4e12
Emax 21 MV/m, 750 mR/hr, FE Onset 18 MV/m
Cavity 6:
Q_FPC = 1.48e7, Q_FP = 1.5e12
Emax 21 MV/m, 1000 mR/hr, FE Onset 16 MV/m
During 1-hour run, noticed Forward/Reflected power would droop (3.2 -> 2.9 kW) for a few minutes then recover. Caused a 21 -> 20 MV/m droop in cavity gradient.
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 02-25-26
Time : 23:13:18
Day : Wednesday
Shift : Owl
Crew Chief : Deir
Program Deputy: Schoene
Team : A
Arm : RADCON
Designated SSO: Smith
LERF Operator:
Operators : Smith
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
No Faraday Cup Readbacks
The current readback for the faraday cups does not respond to tune mode beam. We tried rebooting iocinj4 and iocsoftinj1 to no avail. I recall a previous fix that involved switching from autorange to a specific range and back, but this didn't help either. The linked log entry mentions a GPIB controller communicating slowly, diagnosed by way of blinkenlights, and a potential solution. The referenced "talk" LED on said controller is blinking roughly once per second. I am not sure if that is fast or slow.
iocsoftinj1 restored
iocsoftinj1 restored
FSD Masking Tool: Successful Destination masking to: Injector
iocin4 restored
iocin4 restoration failed
iocin4 restoration failed
"SME Finished Working on Injector SLM"
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
1L10-2 measured last owl shift: https://logbooks.jlab.org/entry/4472905
1L10-8 measured now: https://logbooks.jlab.org/entry/4473058
Field Emission Onset Measurements in 1L10-8
ACG Report 02/25/2026
RTP Driver Support
Channel Access Update
FSD CAMAC to VME Upgrade










