Recent Log Entries

generating computer aided booster phasing

Log Number: 4239913Logbook(s): Entry Makers: dchrilawdeirBody: 

https://tasklists.jlab.org/bslist/tasks/110665

Fig.1-5) Initial conditions (PSET=-109.0). Viewer in. 0L02-7 (2-cell) phased

Fig.6) beam on viewer 10 degree off phase (negative) 0L02-7
Fig.7) beam on BPM 10 degree off phase (negative) 0L02-7

Fig.8) Hand Phased 0L02-7 using BPM's only (PMES=-116.5), with the PID 20-23 locks on to maintain orbits at 0L01 and 0L02

Fig.9) Viewer after hand phasing using BPM's
Fig.10) Viewer after hand Phasing 0L02-7 using viewer for sanity checks (PMES=-113.5). Less resolution on the viewer. Seems to be about a ~3 degree difference.

2L18 Dropped HV again - Low filament voltage on cav 5

Log Number: 4239912Logbook(s): Entry Makers: deirBody: 

This is the second time tonight. First time showed no faults so I turned off auto recover. Probably needs new filament board.

Since we're not beaming beyond FC2 tonight, I'm not going to bother bypassing/LEMing. Maybe it can be handled in the morning while ARC4 is being repaired.

Fig 4: LEM without the cavity.

Autolog save

Log Number: 4239911Logbook(s): Tags: Body: saver ran from opsl03

Saved: dchri 01-17-24 00:57:34 {A:2 B:3 C:5 E:1047 A=BS B=BS C=Tune D=BS 0R08=0.00 0R08 dump in. A B C dump(s) in.

LEM North Linac

Log Number: 4239906Logbook(s): Tags: Body: LEM 9.17 was successfully run for the North Linac on 2024-01-17 00:30:21. The application phase took 00:00:07 to complete.

LEM North Linac

Log Number: 4239905Logbook(s): Tags: Body: LEM 9.17 was successfully run for the North Linac on 2024-01-17 00:29:00. The application phase took 00:00:11 to complete.

Operator SIGN IN

Log Number: 4239904Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             01/17/2024
SHIFT:               Owl

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

Operator SIGN IN

Log Number: 4239903Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Deir
DATE:             01/17/2024
SHIFT:               Owl

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

Phaser Results

Log Number: 4239901Logbook(s): Body: Results where Job # is 823 {154} CAVITY PHASE ERROR (DEGREES) OUTCOME PHASE (DEGREES) START DATE DURATION (SECONDS) CORRECTION DATE CORRECTION ERROR REASON 1L21-8 0.77 CORRECTED -71.10 17-Jan-2024 00:05 58<

CREW CHIEF SIGN IN

Log Number: 4239894Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 01-16-24
Time : 23:44:01
Day : Tuesday
Shift : Owl

Crew Chief : Surles-Law
Program Deputy: Benesch
Team : A
Arm : Deir
Designated SSO: Christian
LERF Operator:
Operators : Deir, Christian

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

1L12-6 KBCU Fault, Bypassed

Log Number: 4239884Logbook(s): Entry Makers: kernsBody: 

Bypassed today at 15:24 for KBCU fault. Looks like tube klystron was in HV with KCCU for about 2 hours before the cavity was turned into RF and CRFP spike and KBCU railed to 200ma. KCCU went to 0.0amps so it either blew another klystron 50 ohm resistor or hiccuped. Needs to be troubleshot again next avilable maintenance.

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