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COMMENT ON RF Maintenance and Repairs for Physics Run 2026

1 day 13 hours ago
Log Number: 4490534Logbook(s): Body: 

2L09-1 and 6 recovered (RFCM), 2L13-1,3,7 recovered and cav 5 2.5W amp replacement in works. 2L12 and 2L20-8 cavities recovered from KMAI and no clamp. Other GSET 0 cavities that I Ungset 0 and tuned in, I forget them all !! C. Kerns and T. Johnson. EPASS printer problems remain on new Chrome and Redhat 9 are worse than the first four years and need help again. Time spent on EPASS paperwork is over 4 hrs. each day to print and lockout 1 task ! Ridiculous when paperwork makes you more frustrated and makes you feel more unsafe through frustration !

kerns

2L20-8 Klystron Weak per Operator

1 day 13 hours ago
Log Number: 4490533Logbook(s): Entry Makers: kernsBody: 

KMAS was set and saved at 2kV to help recoverying or struggling tubes and sometimes in the soft startup program, KMAS is doesnt set back to 0 kV or if the Mod Anode program is started by an arcing tube or weak tube, the program will set it to 2Kv to give the struggling klystron output a boost. Set KMAS back to 0kV while monitoring the KMAI to make sure it doesn't shoot up past the warning point of 2.25ma or rise too fast and trips on KMAI fault at 3.75 ma.

kerns

2L12-7 Un-GSET

1 day 14 hours ago
Log Number: 4490529Logbook(s): Entry Makers: kernsBody: 

GSET 0 with no clue why . It said it was UnGSET 0 for the loss of 2L03 but I found no Clamp voltage when I put it in RF which means the clamp was saved by procedure or micro was saved and cavity wasn't in RF. This sometimes happens in software and and not by operator or RF Xperts because operator OLT experts screens don't even have this function. Full RF expert screens do and even show the klystron running values along with Helium, State Machine, Cavity, and Micro Temperatures that can be used to troubleshoot. No KCCU- NO Gradient : NO 10v -NO RF Gradient !!!

kerns

Operator SIGN IN

1 day 14 hours ago
Log Number: 4490523Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Anthony
DATE:             04/22/2026
SHIFT:               Swing

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

COMMENT ON Bypass IOT 1

1 day 14 hours ago
Log Number: 4490522Logbook(s): Body: 

Matt Jehle and I spent the majority of the day trying to duplicate the fault signature of the trips of pass 2 and could not. IOT 1 is now bypassed to facilitate troubleshooting of the recent Separator Pass 2 trips. We are operating RF into the Pass 3 cavities. If the system now trips we are suspecting the crowbar in the HVPS as the source of trips.

wissmann

CREW CHIEF SIGN IN

1 day 15 hours ago
Log Number: 4490516Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 04-22-26
Time : 15:29:43
Day : Wednesday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Ogur
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

1L06 Level montitor replaced

1 day 15 hours ago
Log Number: 4490514Logbook(s): Entry Makers: nortonBody: 

Replaced and set-up 1L06 AMI level monitor after a failure during firmware update. Replacement is functioning.

1L07 saw a disruption as well as the units are paired.

norton

iochla restored

1 day 15 hours ago
Log Number: 4490509Logbook(s): Tags: Body: restorelib 3.0.1 Target restore date was 2026-04-22 15:00:10 The output from the myRestore execution was as follows: iochla bta@2026-04-22 15:00 79(79) restored vac@2026-04-22 15:00 4(4) restored RasterA@2026-04-22 15:00 4(4) restored blm2@2026-04-22 15:00 8(8) restored dumpDiffInterlocks@2026-04-22 15:00 72(72) restored FSD_1H04@2026-04-22 15:00 10(10) restored systemEnum@2026-04-22 15:00 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iochla (success) PVs modified: 0 PVs modified: 8 PVs mod
alarms

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