Aggregator

Log Number: 4486947Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-7
Username: samari
Date/Time: 04-13-26_09:44:24
RF Status: Good
Tuner Status: Good
Comment: C75 Unbypassed - bringing back up to counter 1L09-3
Special Instructions: Please allow extra time for tuners to catch up when adjusting gradient. Bypass cavity if it gives too many issues.

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4486946Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16716Title:
Optics Investigation

Summary:
Performing BSList 120020 to determine source of beam oscillations preventing effective optics tuning as well as determining if alternative Hall B pass configuration are a possibility.

Log Number: 4486945Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-6
Username: samari
Date/Time: 04-13-26_09:42:54
RF Status: Bad
Tuner Status: Good
Comment: C75 Bypassed - No CRFP or cathode current
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4486944Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-6
Username: samari
Date/Time: 04-13-26_09:39:04
RF Status: Good
Tuner Status: Good
Comment: C75 Unbypassed - bringing up to compensate for cav 3
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4486943Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L09-3
Username: samari
Date/Time: 04-13-26_09:36:31
RF Status: Bad
Tuner Status: Good
Comment: C75 Bypassed - 16 second detuning causing gradient issues
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4486940Logbook(s): 

• ELOG

Entry Makers: bachimannserenoBody: 

I am looking into the specifics on an FFT generated based on archived data (fixed sample rate or variable sample rate).

Log Number: 4486938Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

126 mA; request system expert evaluate and determine if there is an issue

Log Number: 4486937Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

1L21-5 at 96 ppm GLDER; only one above 60-ish, which is where trouble starts...
Broad band gain from 45 > 40 dB. Now GLDER ~40ppm

Log Number: 4486935Logbook(s): 

• ELOG

Body: 

B23 work started today. It appears that we will be done today. We will start B36 tomorrow. There are a bunch of crates and equipment stored in front of the panel. Can we get that moved back enough so the crew can remove and install the panel? If not, is it ok if I move the equipment? Picture of the material is attached.

Log Number: 4486934Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

GASK of 5 is unusual for a C50 cavity at 9.1 MV/m...

Log Number: 4486931Logbook(s): 

• BTLOG
• ELOG

Body: 

Log Number: 4486928Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

2L07-4
2L09-2 & 3
2L12-1

Will adjust to get back to +/- 0.2 band with crew chief permission

Log Number: 4486927Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

Beam Conditions:
Total Linac Current (R2XXITOT) = 8.04
Hall A Current (IBC1H04CRCUR2) = 0
Hall B Current (IPM2C24A.IENG) = 0.116729
Hall C Current (IBC3H00CRCUR4) = 4.05
Hall D Current (IBCAD00CRCUR6) = 0
BSY Current (IBC4C00CRCUR5) = 0
INJ Energy (MMSINJEGAIN) = 38.9312
NL Energy (MMSLIN1EGAIN) = 345
SL Energy (MMSLIN2EGAIN) = 345

Gradient Problems:
0L02-7 Klystron Cathode Current (KCCU)=0.00390625 (<=0.7A)
0L03-1 Local Oscillator Power (LOPW)=55 (<=70mW)
1L04-8 GLDER=203 (>=200) with RF OFF - Check Detuning
1L06-1 GLDER=436 (>=200) with RF OFF - Check Detuning
1L07-1 Local Oscillator Power

Log Number: 4486916Logbook(s): 

• ELOG

Entry Makers: chumphryBody: The below linked page to EES DC was not answered.

Log Number: 4486915Logbook(s): 

• ELOG

Entry Makers: chumphryBody: The below linked page to EES DC was not answered.

Log Number: 4486914Logbook(s): 

• ELOG

Entry Makers: chumphryBody: The below linked page to EES DC was not answered.

Log Number: 4486913Logbook(s): 

• ELOG

Entry Makers: chumphryBody: The below linked page to EES DC was not answered.

Log Number: 4486912Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             04/13/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4486908Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: 15uA to xC 

Log Number: 4486906Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Blackshaw
DATE:             04/13/2026
SHIFT:               Day

The operator has read the following:

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