Aggregator

Log Number: 4365148Logbook(s): 

• ELOG
• LERFLOG

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

Date : 04-25-25
Time : 15:43:22
Day : Friday
Shift : Swing

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

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

Log Number: 4365147Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: 3 Hall Beam

Log Number: 4365146Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 8 0 0

Log Number: 4365143Logbook(s): 

• POLOG
• ELOG

Body: 

Vacuum pump "epicsname" and "hvname" properties are used to define the ionpump alarm pvs.

-- epicsname : current alarm (used if different from name)
-- hvname: hv alarm (if hvname set)

Please confirm the values shown and I'll regenerate the alarm handler files.

Log Number: 4365138Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

GASK was drifting up in all the chopper cavities, so the clamps were raised to give them more breathing room per RF guidance.

Log Number: 4365123Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 13939Title:
Chopper GMES Instability

Summary:
Particularly, Chopper 1 Y's GMES continually drops to ~7MV/m every few minutes causing the associated alarm to sound, but does not trip beam. CIS has been called and will investigate.

Log Number: 4365117Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 13939Title:
Chopper GMES Instability

Summary:
Particularly, Chopper 1 Y's GMES continually drops to ~7MV/m causing the associated alarm to sound, but does not trip beam. CIS has been called and will investigate.

Log Number: 4365106Logbook(s): 

• ELOG
• RFLOG

Entry Makers: alexsBody: 

The GMES of the Chopper 1 Y cavity is dropping out and exponentially recovering without pulling an FSD trip. Investigation ongoing.

Log Number: 4365105Logbook(s): 

• HBLOG
• ELOG

Entry Makers: bbarkerBody: 

Log Number: 4365101Logbook(s): 

• HALOG
• ELOG

Entry Makers: alexsBody: 

Log Number: 4365100Logbook(s): 

• POLOG
• ELOG

Entry Makers: gramesBody: 

The polarized source baked region 2I/1I ion pumps are set to trip hardware interlocks at 5uA ion pump current. The transition region ion pumps in the 0I region where the A1/A2 apertures are located are set to be higher at 10uA.

We want to have software head's up alarms before interlock faults occur, i.e.

Log Number: 4365097Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

Log Number: 4365095Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 2.6 Target restore date was 2025-04-23 17:36:36 The output from the myRestore execution was as follows: iocsoftradtst systemEnum@2025-04-23 17:36 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -s -i iocsoftradtst (failure) Your command line did not match any usage patten.

Log Number: 4365093Logbook(s): 

• POLOG
• ELOG

Entry Makers: gramesBody: 

The log base 10 tick mark should occur between powers of 1 not 2. Would be nice if the odd powers were visible too.

Log Number: 4365087Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 2.6 Target restore date was 2025-04-23 17:36:36 The output from the myRestore execution was as follows: iocsoftradtst systemEnum@2025-04-23 17:36 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -s -i iocsoftradtst (failure) Your command line did not match any usage patten.

Log Number: 4365086Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 2.6 Target restore date was 2025-04-23 17:36:36 The output from the myRestore execution was as follows: iocsoftradtst systemEnum@2025-04-23 17:36 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -s -i iocsoftradtst (failure) Your command line did not match any usage patten.

Log Number: 4365084Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

Log Number: 4365073Logbook(s): 

• HALOG
• ELOG

Entry Makers: shrinerBody: 

xA requests increase from 15 to 20 uA. current increased at 1 uA intervals at the direction of Hall staff.

Log Number: 4365070Logbook(s): 

• ELOG

Body: Calibration ParametersHall:ATarget: Loop 1 30cmPass: 3Note: .6x.6 raster, up to 5 uACalibrated On:2025-Apr-11 20:45Calibrated By: samariFile:A-2025-04-11_2045_Loop_1_30cm_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4365069Logbook(s): 

• HDLOG
• ELOG

Entry Makers: alexsBody: 

Tracked down the apparent source of Hall D's current instability to a change in MBH0I06V (fig 1). Reverting to its previous value looks to have helped (fig 2). Beam loss has also slowly been improving (fig 3). Not sure if it's 100% related, but happy to take credit for now.