Aggregator

Log Number: 4516938Logbook(s): 

• ELOG

Body: 

1L15-2 Third kly. resistor blown in cav.2 and this one on first HV attempt with DC overload. Pulled jumper and bypassed until klystron can be looked at. 1L13-2 has problem with getting gradient over 7 Mv/m. Detune flies off with small gradient changes until CRFP rails over 5kW and quenches. Replaced RFCM but still has identical problem. Both times there is good drive but TDETA will not track back in and CRFP is very unsteady. Could be 2.5w amp, driveline or klystron but can't tell until we lock it up. Set back at 7Mv/m and optimized.

Log Number: 4516936Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

Area.Arcs.Arc1.Spreader
Area.Arcs.Arc1.Arc
Area.Arcs.Arc1.Recombiner
Area.Arcs.Arc1.Extraction
Area.Arcs.Arc2.Spreader
Area.Arcs.Arc2.Arc
Area.Arcs.Arc2.Recombiner
Area.Arcs.Arc2.Extraction
Area.Arcs.Arc3.Spreader
Area.Arcs.Arc3.Arc
Area.Arcs.Arc3.Recombiner
Area.Arcs.Arc3.Extraction
Area.Arcs.Arc4.Spreader
Area.Arcs.Arc4.Arc
Area.Arcs.Arc4.Recombiner
Area.Arcs.Arc4.Extraction
Area.Arcs.Arc5.Spreader
Area.Arcs.Arc5.Arc

Log Number: 4516935Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
XSEP6T Ramp Rate = 9.647 A/s

Log Number: 4516934Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-26-26
Time : 15:26:22
Day : Friday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Nissen
Team : X
Arm : Shenenberger
Designated SSO: Yoon
LERF Operator:
Operators : Schaumloffel, Shenenberger, Yoon

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

Log Number: 4516933Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AT SET POINT 1 by version 2-16 of the Box Supply Cycling Script:
DOG2E Ramp Rate N/A
DOG4E Ramp Rate N/A
DOG6E Ramp Rate N/A
DOG8E Ramp Rate N/A

Log Number: 4516932Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC2A Ramp Rate = 6.939 A/s
ARC4A Ramp Rate = 10.656 A/s
ARC6A Ramp Rate = 9.222 A/s
ARC8A Ramp Rate = 11.974 A/s
ARCAA Ramp Rate = 11.944 A/s
XSEP2T Ramp Rate = 5.646 A/s
XSEP4T Ramp Rate = 5.242 A/s
XSEP6T Ramp Rate = 9.176 A/s
XSEP8T Ramp Rate = 17.388 A/s
XSEPAT Ramp Rate = 16.259 A/s

Log Number: 4516931Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AT SET POINT 1 by version 2-16 of the Box Supply Cycling Script:
ARC2A Ramp Rate = 6.939 A/s
ARC4A Ramp Rate = 10.656 A/s
ARC6A Ramp Rate = 9.222 A/s
ARC8A Ramp Rate = 11.974 A/s
ARCAA Ramp Rate = 11.944 A/s
XSEP2T Ramp Rate = 5.646 A/s
XSEP4T Ramp Rate = 5.242 A/s
XSEP6T Ramp Rate = 9.176 A/s
XSEP8T Ramp Rate = 17.388 A/s
XSEPAT Ramp Rate = 16.259 A/s

Log Number: 4516928Logbook(s): 

• ELOG
• SRFLOG

Body: 

- Check on VBV2L16B hissing during magnet flushing today.
- Determined compressed air leak is very slow, not worth the risk of swapping now
- Waiting until the SAM is recommended

Log Number: 4516924Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Prepping for SL Survey

Log Number: 4516923Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4516922Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

RF recovery

Log Number: 4516921Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17283Title:
MJC5A18 Flush and associated access

Summary:
Reopening incident when RadCon entered SL for survey to allow MSS to flush the magnet.

Log Number: 4516920Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R26
R28
R29
R2A
R2B
R2I
R2Q
R2J
R2K
R2C
R2D
R2M
R2E
R2F
R2N
R2O
R2G
R2H

Log Number: 4516919Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Left it at 7 Mv/m but it's acting a little worse with RFCM changed. Check rest of driveline next maintenance.

Log Number: 4516918Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L25-5
Username: janak
Date/Time: 06-26-26_14:59:39
RF Status: Bad
Tuner Status: Good
Comment: C100 Bypassed - Chassis calibration needed? LOPW
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4516916Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L13-2
Username: kerns
Date/Time: 06-26-26_14:51:35
RF Status: Good
Tuner Status: Good
Comment: Replaced RFCM but still poor tuning regulation with small gradient changes above 7Mv/m. Needs driveline and amp checked.
Special Instructions:

Maintenance Tag: Component: RFCM {Removed SN: 345, Replacement SN: 121}

Log Number: 4516915Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Tdeta all over with slight gradient changes and quenching with high CRFP when gradient changes made above 4 Mv/m. Replaced RFCM thinking it was a phase problem but it's acting the same as last controls and Tdeta and CRFP finicky and dropping cavity out with every small gradient change. Might be amp acting up but have plenty of drive and should be able to get more than 7 Mv/m.

Log Number: 4516912Logbook(s): 

• ELOG

Body: 

Mag Shop:

All klixons were also tested and are working well and right in perfect Ohm testing values (.7ohms/whole block).

Log Number: 4516911Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
1L20-2
Username: benesch
Date/Time: 06-26-26_14:29:18
RF Status: Good
Tuner Status: Good
Comment: DRVH=3.000 Arc Rate Management still eight at 3.1, we may want to turn this off
Previous OPS DRVH: 3.1
Special Instructions:

Log Number: 4516910Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 8.127 A/s
ARC3A Ramp Rate = 9.548 A/s
ARC5A Ramp Rate = 9.961 A/s
ARC9A Ramp Rate = 4.991 A/s
RSEP9A Ramp Rate = 5.058 A/s