Aggregator

Log Number: 4515022Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L20-4
Username: jkt
Date/Time: 06-22-26_09:29:15
RF Status: Good
Tuner Status: Good
Comment: Recovered and manual arc test passed/worked
Special Instructions:

Maintenance Tag: Component: Arc Detector

Log Number: 4515021Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L20-3
Username: jkt
Date/Time: 06-22-26_09:28:54
RF Status: Good
Tuner Status: Good
Comment: Recovered and manual arc test passed/worked
Special Instructions:

Maintenance Tag: Component: Arc Detector

Log Number: 4515020Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
0L04-1
Username: bjacob
Date/Time: 06-22-26_09:20:12
RF Status: Bad
Tuner Status: Good
Comment: C100 Unbypassed - RF SMEs taking a look
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4515019Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L17-3
Username: jkt
Date/Time: 06-22-26_09:13:22
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515018Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-8
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515017Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-7
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515016Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-6
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515015Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-5
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515014Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-4
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515013Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-3
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515012Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been unbypassed:
2L18-2
Username: jkt
Date/Time: 06-22-26_09:12:33
RF Status: Good
Tuner Status: Good
Comment: Unbypassed - stepped on -100k - attempting recover
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515011Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L20-8
Username: jkt
Date/Time: 06-22-26_09:05:34
RF Status: Good
Tuner Status: Good
Comment: Low KCCU at 0.85amp with filaments at 7.2V
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4515010Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Log Number: 4515009Logbook(s): 

• ELOG

Entry Makers: nserenoBody: 

Took open/closed loop data for Hall C FFB system on swing shirt 6/21/2026. Hall C beam current and energy were 70 uA and 6480 MeV as given by PVs: ibcm1 and MMSHLCE.

We were able to get 25 data sets closed loop before FSD trips disabled the system. Similarly we were able to get 41 data sets open loop after requesting the operations crew put the system in "pause" mode to take data. Typically we usually take 100 data sets for both open and closed loop conditions but the frequency of FSD trips prevented that this time.

Log Number: 4515007Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: xB/C Beam

Log Number: 4515006Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Humphry
DATE:             06/22/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4515001Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             06/22/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4515000Logbook(s): 

• ELOG
• INCLOG

Body: 

Called in regards to beamline faults at 1L25 yesterday. Looked at the archiver today and noticed spikes on VIP1L25B hitting just past the slow trip setpoint. Looking adjacent zones/pumps shows increased beamline vacuum as far as 1L22 to the end of 1L26 since June 1st at around 9-10AM. Only thing I could find for that day was SRF/RF work at 1L25 : https://logbooks.jlab.org/entry/4507348

Log Number: 4514999Logbook(s): 

• ELOG
• LERFLOG

Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 06-22-26
Time : 07:55:27
Day : Monday
Shift : Day

Crew Chief : Blackshaw
Program Deputy: Nissen
Team : E
Arm : RadCon
Designated SSO: Humphry
LERF Operator:
Operators : Humphry, Janak

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

Log Number: 4514994Logbook(s): 

• ELOG

Body: Results where Job # is 1021 {64} CAVITY PHASE ERROR (DEGREES) OUTCOME PHASE (DEGREES) START DATE DURATION (SECONDS) CORRECTION DATE CORRECTION ERROR REASON 2L14-1 1.00 CORRECTED 108.01 22-Jun-2026 05:25 59<