Aggregator

Log Number: 4492670Logbook(s): 

• ELOG

Body: 

Replaced fiber cable between 2L04-6 filament board and analog instrumentation board and reseated filament board. Upon trying to restore filaments, new problems appeared in cavities 3, 4, and 7. It looks like there were a lot of aging filament boards in that zone whose expiration dates all came at once. Since we're out of spares, moved the good board from cavity 6 to cavity 7, and managed to perform a field repair on the cavity 4 board (a nylon screw holding an inductor housing together had crumbled away from heat and age).

Log Number: 4492669Logbook(s): 

• ELOG

Body: 

DC Power would like to swap the following cards today due to higher than nominal analog block temperatures:

MBT2R01H (NA01B07 ch. 30)
MBD5C11H (SV01B25 ch. 7)
MBD5C11BH (SV01B25 ch. 10)
MBC9A29H (SA01B06 ch. 22)
MBC7R09H (SL01B03 ch. 19)
MBC7R10H (SL01B03 ch. 7)
MQA3R08 (SL01B03 ch. 28)
MBT4S08V (W102B09 ch. 16)
MBC6S10H (W102B10 ch. 2)
MQC2A16 (W401B11 ch. 25)

I spoke to the crew chief regarding this earlier and got an ok. We will notify the crew chief before the swaps begin.

Log Number: 4492665Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L04-3
Username: alexs
Date/Time: 04-29-26_12:02:54
RF Status: Bad
Tuner Status: Good
Comment: Needs filament board and CPS load resistor replacement
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4492664Logbook(s): 

• MOLLER
• POLOG
• ELOG

Entry Makers: suleimanBody: 

So now "COUNTS SET" and "COUNTS READ" will show the same values.

Log Number: 4492661Logbook(s): 

• ELOG
• RADLOG

Entry Makers: samariBody: 

Log Number: 4492660Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

At DC Power's request.

I suppose we missed these when we were turning off magnets yesterday

Log Number: 4492656Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned off for:
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: 4492654Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-02-25 11:21:48 The output from the myRestore execution was as follows: iocsoftmdaq1 systemEnum@2026-02-25 11:21 2(2) restored rtpcellxport@2026-02-25 11:21 32(32) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftmdaq1 (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4492653Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
2L25-3
Username: michaelm
Date/Time: 04-29-26_09:50:06
RF Status: Good
Tuner Status: Good
Comment: DRVH=17.000 Frequent arcing at 17.5
Previous OPS DRVH: 24
Special Instructions:

Log Number: 4492644Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-29 09:24:19 The output from the myRestore execution was as follows: iocsoftfac2 systemEnum@2026-04-29 09:24 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftfac2 (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4492643Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-29 09:21:50 The output from the myRestore execution was as follows: iocsoftfac DemandPower@2026-04-29 09:21 1(1) restored systemEnum@2026-04-29 09:21 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftfac (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4492642Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-29 09:20:09 The output from the myRestore execution was as follows: iocsoftfac1 systemEnum@2026-04-29 09:20 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftfac1 (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4492639Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             04/29/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4492638Logbook(s): 

• ELOG

Body: ACC=>CRYO=>CHL=>CCHLCT has been enabled in alarm handler

bringing back

Log Number: 4492637Logbook(s): 

• ELOG

Body: ACC=>CRYO=>CHL=>CCHLCT has been disabled in alarm handler

troubleshooting

Log Number: 4492636Logbook(s): 

• CLOG
• ELOG

Entry Makers: michaelmBody: 

Ramping it up so the JT acclimates to the higher heat load in advance of replacing the heater heat with RF heat during the unit test in an hour or so

Log Number: 4492629Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam has been set up to HB (5th pass) and HC dumplette

Log Number: 4492626Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             04/29/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4492625Logbook(s): 

• SRFLOG
• CLOG
• ELOG

Entry Makers: dchriBody: 

Heaters & JT valve set back to original configurations

Heaters are still ramping up...

Log Number: 4492624Logbook(s): 

• ELOG
• SRFLOG

Body: 

Another set of measurements on 2L25. Gathered some more data points on cavity 2, 3, 4, 5, 6. If CEBAF is still down by midnight-o-one tomorrow then I'll likely take more data points on OWL shift again.