Aggregator

Log Number: 4543287Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned off in:
R22
R23
R24
R25
R26
R27
R28
R29
R2A
R2B
R2C
R2D
R2E
R2F
R2G
R2H
R2I
R2J
R2K
R2L
R2M
R2N
R2O
R2P
R2Q

Log Number: 4543285Logbook(s): 

• DCLOG
• ELOG

Entry Makers: eformanBody: 

Since we're down for (presumably) hours anyway, we are going to enter the linac to take opportunistic thermal images of the arc 5 & 9 dipole strings.

Log Number: 4543284Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 8.127 A/s
ARC2A Ramp Rate = 7.217 A/s
ARC3A Ramp Rate = 10.099 A/s
ARC4A Ramp Rate = 11.344 A/s
ARC5A Ramp Rate = 10.435 A/s
ARC6A Ramp Rate = 9.558 A/s
ARC7A Ramp Rate = 10.484 A/s
ARC8A Ramp Rate = 12.277 A/s
ARC9A Ramp Rate = 9.900 A/s
ARCAA Ramp Rate = 12.581 A/s
DOG1E Ramp Rate = 3.839 A/s
DOG2E Ramp Rate N/A
DOG3E Ramp Rate N/A
DOG4E Ramp Rate N/A
DOG5E Ramp Rate N/A
DOG6E Ramp Rate N/A
DOG7E Ramp Rate N/A
DOG8E Ramp Rate N/A
DOG9E Ramp Rate N/A
RSEP8A

Log Number: 4543283Logbook(s): 

• CLOG
• ELOG

Entry Makers: beneschBody: 

has begun. There's a little liquid in 0L04 module (0L05 cryo) now. Insulating vacuum still poor.

Log Number: 4543280Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Cryo reports that pumpdown attempts have been unsuccessful. They will report back in an hour.

Log Number: 4543279Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Log Number: 4543278Logbook(s): 

• POLOG
• ELOG

Body: 

SRF reports that they are inclined to wait until the CHL is back online and module is refilling before intervening (a similar thing happened once before and the situation self-corrected after the module refilled).

Log Number: 4543277Logbook(s): 

• ELOG

Body: INJECTOR=>VACUUM=>INJ-L=>VIP0L01A has been enabled in alarm handler

Below alarm threshold. Reenabling.

Log Number: 4543276Logbook(s): 

• ELOG

Body: INJECTOR=>VACUUM=>INJ-L=>VIP0L01 has been enabled in alarm handler

Below major alarm threshold. Reenabling.

Log Number: 4543275Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Thursday August 13 through 18:00 Friday August 14 AES I&C Systems FY 27 Pene.

Log Number: 4543274Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

The Alarm Handler monitors some of the SRF VIPs in the Injector, but the point at which it goes into alarm seems to differ from the Injector SRF vacuum screen. Originally this log entry was supposed to be about VIP0L05B, but while I was writing it, the same thing happened for VIP0L06A and VIP0L05A. All three valves were in alarm in the Alarm Handler, but were showing no alarms/faults on the vacuum screen.
Also while writing this entry, VIP0L01 went into alarm in the Alarm Handler AND showed up on the vacuum screen. All valves have the same HIHI limit of 1e-7.

Log Number: 4543273Logbook(s): 

• ELOG

Log Number: 4543272Logbook(s): 

• ELOG

Body: INJECTOR=>VACUUM=>INJ-L=>VIP0L01A has been disabled in alarm handler

chattering

Log Number: 4543271Logbook(s): 

• ELOG

Body: INJECTOR=>VACUUM=>INJ-L=>VIP0L01 has been disabled in alarm handler

chattering

Log Number: 4543270Logbook(s): 

• SRFLOG
• ELOG

Entry Makers: beneschBody: 

Install an Agilent system during the SAM. 1L07 and 1L23 not great either, figure 2. Four pumpdown attempts so far, lower right of figure 3.

Log Number: 4543269Logbook(s): 

• POLOG
• ELOG

Entry Makers: eformanBody: 

Cryomodule 0L04 appears to be depleated of cryogen (liquid level = 0) as a consequence of the 2KCB trip. Insulating vacuum on that one has risen to 1e-3.

Log Number: 4543266Logbook(s): 

• CLOG
• ELOG

Entry Makers: thilanBody: 

Attempting pumpdown of NLinac

Log Number: 4543260Logbook(s): 

• POLOG
• ELOG

Entry Makers: alexsBody: 

Appears to have started at VIP0L01, then spread. Beam and RF had not been on for a while due to the CHL trip. Valves have been closed out of an abundance of caution. CIS on call is on the way in to investigate.

Log Number: 4543248Logbook(s): 

• ELOG
• LERFLOG

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

Date : 08-14-26
Time : 15:28:08
Day : Friday
Shift : Swing

Crew Chief : Forman
Program Deputy: Park
Team : X
Arm : Anthony
Designated SSO: Shriner
LERF Operator:
Operators : Anthony, Shriner

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

Log Number: 4543249Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Noticed a lot of oscillation in the 1A SLM during the thunderstorm @~1320. Spent some time looking for bad actors but then noticed the beam spot looked quite different as well so I tried adjusting NL gang phase. Found it had shifted 4 degrees.