Aggregator

Log Number: 4505267Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

Just like last time, let's see if it restores it's self.

If this IOC keeps going in and out we may have to contact software

Although, It does not seem to be causing disruptions to beam delivery

Log Number: 4505266Logbook(s): 

• MOLLER
• ELOG

Tags: 

• Moller
• PD

Entry Makers: jonesgaskelldwineskashydougberdnikciprianBody: 

Hall A techs continued pouring of grout first part of work day. Second part of day team removed de-installed items from hall to CMSA laydown area. EIC continued with installation of 1 inch waterlines for MPS. Target group continued with installation of 4 inch and 6 inch piping along truck ramp for Helium feed to Hall.

Log Number: 4505260Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Tuesday May 26 through 18:00 Wednesday May 27 AES I&C Systems Legacy SRF Vacuum Control Crate General Maintenance (2026-2027)

2026-05-27 11:05 - Leo Ketchum

Log Number: 4505259Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

It appears that there was a position excursion on the Hall B lock BPMs just prior to the beam trip/valve closure. One can see the lock correctors responding to the position shift in fig. 1.

Fig. 1: Hall B valves & target pressure on top plot, BPMs on middle plot, lock correctors on bottom plot.

Log Number: 4505257Logbook(s): 

• ELOG

Entry Makers: dchriBody: 

given the guidance for response, looks like we may contact software.
Have not attempted to reboot IOC due to guidance

I did a quick scan through the list of PV's on this IOC, nothing critical stood out to me and the cryo heaters are unaffected

As I'm typing this (Fig. 5) IOC came back online. All is well

Log Number: 4505256Logbook(s): 

• HBLOG
• ELOG

Entry Makers: yoonBody: 

xB RA team has been reminded that work on beamline and its components are not allowed

Log Number: 4505249Logbook(s): 

• HBLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4505248Logbook(s): 

• HBLOG
• ELOG

Entry Makers: dchriBody: 

Not sure what has happened. Pressure at the target spiked. Valves closed. Hopefully xB can deduce some conclusions on whats going on...

No beam to xB, dumplett is in due to bleed through. Halo's have sky rocketed with bleed-through alone.

Downstream & Midstream Halo's tracks with pressure swings

FIG. 5
Rad monitor #30 had increased until the dumplett went in

Log Number: 4505241Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Hall has requested beam off, dumplette in.

Log Number: 4505239Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17043Title:
Hall B valves closed, target pressure unusual then dropped

Summary:
Hall B valves closed shortly after their target pressure began to sway in a very unusual way and then dropped hard. Then Hall called and requested no beam.

Log Number: 4505235Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: HallC,HallD
User: eforman

Log Number: 4505236Logbook(s): 

• HBLOG
• ELOG

Entry Makers: yoonBody: 

Log Number: 4505230Logbook(s): 

• ELOG
• SRFLOG

Body: 

VIP1L06B
- Installed simulated load on VIP1L06B, closed VBV1L05B and VBV1L07A
- Kept VBV1L06A, VBV1L06B open
- Isolated 1L06 and adjacent girders, watched VIP1L06A, VIP1L07A, and VIP1L07B for pressure rises or problems
- No obvious problems with cryomodule, pressures declined or remained flat
- Decision was to keep running the machine, watch for trouble
- Still plan to install appendage pump on VIP1L06B next week

Log Number: 4505222Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Log Number: 4505218Logbook(s): 

• ELOG

Body: 

Log Number: 4505216Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             05/27/2026
SHIFT:               Swing

The operator has read the following:

Log Number: 4505214Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Yoon
DATE:             05/27/2026
SHIFT:               Swing

The operator has read the following:

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

Log Number: 4505213Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             05/27/2026
SHIFT:               Swing

The operator has read the following:

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

Log Number: 4505212Logbook(s): 

• ELOG
• LERFLOG

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

Date : 05-27-26
Time : 16:02:50
Day : Wednesday
Shift : Swing

Crew Chief : Forman
Program Deputy: Saitiniyazi
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: 4505209Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

xD will be restored as soon as we finish bringing them back to beam permit.