Aggregator
Cause of gun HV trip off unclear. All gun signals recovered ok.
The gun HV tripped off yesterday with no indication of precursor. See Fig. 1 and 2. As noted in the ELOG, the highest pressure response was at the gun IP VIP2I00, propagating downstream. V-Wien was off, H-Wien was set only to +/- 2 kV. See Fig. 3.
The gun recoevered w/o issues, see Fig. 1.
Program Deputy Summary, presented 2026-03-02
RF On/Off turned HV Off
Gun HV Turned Off
Gun HV Rampdown Initiated
Operator SIGN IN
Operator SIGN IN
QuickPic - Box Supplies/Shunt Diagnostics
QuickPic - RF Captain: Status
HCO Status Report for 1R, 2R, xBCD Shield Wall, and xBD Dumplette Destinations
The attached report outlines all remaining Not Ready components that are required for Operations to proceed up to the xBCD Shield Wall destinations. The main goal of this is to highlight work that needs to be done in order to send beam to the 1R and 2R dumplettes this weekend.
Show Stoppers for sending beam to the 1R Dumplette:
MDB1L25V
MDB1L26H
VBV1L11A
eDT
CEBAF Pre-Ops Checklist
Accelerator Alarm Handler - IIRC this was done Friday, but not ugpraded to checked.
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 03-02-26
Time : 07:23:38
Day : Monday
Shift : Day
Crew Chief : Humphry
Program Deputy: Schoene
Team : X
Arm : RadCon
Designated SSO: Janak
LERF Operator:
Operators : Janak, Blackshaw
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
COMMENT ON Perform PM service for the counting house CRU's
QE Measurement
CIS Work Summary 02/27/2026
Gun HV recovered; seems okay at the moment
Gun HV Turned Off
Gun HV dropped
Operator SIGN IN
Injector Allsave Comparisons
Checked centering through the chopper, prebuncher phase, and B/D laser phases for both saves up to 1D as these were areas the SME had expressed concern about when performing his setup on the 23rd. I also took viewer walks and took note of collinearity. Prebuncher phase for the SME setup from the 23rd was pretty much spot on but laser phases required some correction. Said SME dropped by to check up on things and mentioned he hadn't checked phases for the other lasers during his setup. Prebuncher phase for the operator setup was close, but not quite as close as the SME setup.










