Aggregator

Log Number: 4515262Logbook(s): 

• DCLOG
• ELOG

Entry Makers: yoonBody: 

took setpoint, will cycle on next trip

no TC swap needed

Log Number: 4515253Logbook(s): 

• ELOG

Body: 

IP Pack connected to rack communications was found to be bad. It was replaced with a ready spare. No LOTO of the rack was required. Rack was turned over to ops.

Peirce, Crespo, Delk, Kumar

Log Number: 4515252Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Sunday June 21 through 18:00 Monday June 22 AES DC power Systems Replace utility chassis in trim rack W202B13

2026-06-22 17:06 - Kevin Banks

Late

Log Number: 4515237Logbook(s): 

• ELOG

Body: 

Late entry. We came in this morning and swapped out the utility chassis, thinking this could resolve our come issues. With no joy, it leaned us towards a problem with software. Software on call was contacted. DC power will continue to troubleshoot to see exactly what caused the comm failure to this rack.

Banks/Coleman

Log Number: 4515212Logbook(s): 

• ELOG
• SRFLOG

Body: 

No major update.

Log Number: 4515210Logbook(s): 

• ELOG

Body: 

Good to close this out?

Log Number: 4515209Logbook(s): 

• ELOG

Body: 

Log Number: 4515208Logbook(s): 

• ELOG

Body: 

Once the PTW is on-issue this task is approved.

Log Number: 4515206Logbook(s): 

• ELOG

Body: 

PTW on-issue. Added to Wed 6/24 tasks.

Log Number: 4515205Logbook(s): 

• ELOG

Body: 

Coordinate with Cryo and guards. This task is approved for MD Wed 6/24.

Log Number: 4515204Logbook(s): 

• ELOG

Body: 

Good to go 6/24.

Log Number: 4515203Logbook(s): 

• ELOG

Body: 

Re;6/24 plans, sounds good. Added to SAM Cal.

Log Number: 4515197Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             06/22/2026
SHIFT:               Swing

The operator has read the following:

Log Number: 4515193Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Yoon
DATE:             06/22/2026
SHIFT:               Swing

The operator has read the following:

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

Log Number: 4515192Logbook(s): 

• ELOG

Body: 

Once the PTW is on-issue this task is approved. Slated to occur Wed 6/24.

Log Number: 4515191Logbook(s): 

• ELOG

Body: 

Log Number: 4515190Logbook(s): 

• ELOG

Body: 

PTW on-issue. Added to MD activities for Wed 6/24.

Log Number: 4515187Logbook(s): 

• ELOG

Body: 

Once the PTW is on-issue this work is approved to occur. Slated for Wed 6/24 MD.

Log Number: 4515186Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-22-26
Time : 15:29:58
Day : Monday
Shift : Swing

Crew Chief : Forman
Program Deputy: Nissen
Team : F
Arm : Schaumloffel
Designated SSO: Yoon
LERF Operator:
Operators : Schaumloffel, Yoon

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

Log Number: 4515182Logbook(s): 

• CLOG
• ELOG

Entry Makers: johnwBody: 

This morning, SLinac heater margin floated in and out of alarm. As a cryo response, we received permission to change some clip heat values in 2L22, 2L25, and 2L26.

2L22-1 was raised from 11W to 19W, 2L22-6 was raised from 17W to 25W. Heater Readback is 0.5-0.6W

2L25-5 was lowered from 15W to 1W. Heater Readback is 1.06W

2L26-1 was lowered from 10W to 1W, 2L26-3 was lowered from 15W to 1W, 2L26-7 was lowered from 15W to 1W. Heater Readback is 3.12W

In total, electric heat use in the C100s was reduced by about 70W. This equates to ~2.8W/module of heater margin increase.