Aggregator

Log Number: 4471902Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L25-7
Username: kerns
Date/Time: 02-18-26_16:14:34
RF Status: Bad
Tuner Status: Good
Comment: ModAnode Volt High Fault preventing HV.
Special Instructions:

Maintenance Tag: Component: Mod Anode Board

Log Number: 4471901Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Unable to get back into HV after PSS cert and several HV drops. Cavity 7 most likely needs a new ModAnode board.

Log Number: 4471900Logbook(s): 

• ELOG
• POLOG

Tags: 

• Autolog

Body: 

Log Number: 4471899Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             02/18/2026
SHIFT:               Swing

The operator has read the following:

Log Number: 4471898Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L04-2
Username: kerns
Date/Time: 02-18-26_15:59:13
RF Status: Bad
Tuner Status: Good
Comment: RFCM locked up. RD1 Installed to get zone HV enable for PSS cert HV.
Special Instructions:

Maintenance Tag: Component: RFCM {Removed SN: 005, Replacement SN: RD1}

Log Number: 4471897Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L08-8
Username: kerns
Date/Time: 02-18-26_15:54:53
RF Status: Good
Tuner Status: Good
Comment: Disreguard last comment. RFCM replaced 02/17/26 and zone HV restored. Some KMAI.
Special Instructions:

Maintenance Tag: Component: RFCM

Log Number: 4471896Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L08-8
Username: kerns
Date/Time: 02-18-26_15:50:25
RF Status: Bad
Tuner Status: Good
Comment: RFCM locked up. RD1 installed and cavity bypassed for HV PSS cert.
Special Instructions:

Maintenance Tag: Component: RFCM {Removed SN: 005, Replacement SN: RD1}

Log Number: 4471894Logbook(s): 

• ELOG
• SRFLOG

Body: 

2L03
- NEG activation successful
- All metal valve open
- Pump cart and cleanroom removed

2L25
- New V-blocks manufactured
- Install tomorrow morning, anticipate no problems with the magnets

MYBBS06
- Beamlines reconnected
- Pumping down, leak check tomorrow morning

Log Number: 4471893Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L20-4
Username: jkt
Date/Time: 02-18-26_15:27:22
RF Status: Good
Tuner Status: Good
Comment: Recovered . KCCU is back to normal after the Kly arc.
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4471892Logbook(s): 

• ELOG

Body: 

Task retroactively closed. Long completed

Log Number: 4471890Logbook(s): 

• ELOG

Body: 

Task retroactively closed. Long completed.

Log Number: 4471888Logbook(s): 

• ELOG
• RFLOG

Body: 

Increased the tune frequency of Separator pass 3 cavity 2 by 15 kHz. After tuning the cavity, we operated it at 300 W which showed it is now better optimized for the higher power operation needed in May. This task is complete.

Log Number: 4471889Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

Log Number: 4471887Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-18-26
Time : 15:20:39
Day : Wednesday
Shift : Swing

Crew Chief : Forman
Program Deputy: Buttles
Team : F
Arm : RADCON
Designated SSO: Schaumloffel
LERF Operator:
Operators : Yoon, Schaumloffel

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

Log Number: 4471886Logbook(s): 

• POLOG
• ELOG
• LLRFLOG

Body: 

Screen captures of the oscilloscope when checking the UVA RTP driver outputs
All images using the helicity signal as the reference (yellow trace).
Figure 1: Cable 1
Figure 2: Cable 2
Figure 3: Cable 3
Figure 4: Cable 4

Log Number: 4471885Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R12
R13
R14
R17
R18
R1E
R1F
R1G
R1H
R1I
R1J
R1K
R1M
R1O

Log Number: 4471883Logbook(s): 

• ELOG

Body: 

18th February work:
- prepare for 2L25 and 2L26 warm region girders alignment

19th February work map:
- 2L25 and 2L26 warm region girders alignment

Log Number: 4471879Logbook(s): 

• ELOG

Body: 

Tower pumps controls restored to normal automatic operation. Verified backup pump will start if pump failure is indicated.

Log Number: 4471878Logbook(s): 

• ELOG
• SRFPLASMA

Body: 

Installed DecaRad system on 2L03 for SRF Commissioning.
2L03 Readbacks via SRF DecaRad screen sl05a
__Drad Ch.__ /__Location__
DRADS05ASRF1 1L10 WG 1&2
DRADS05ASRF2 n/c
DRADS05ASRF3 1L10 WG 3&4
DRADS05ASRF4 n/c
DRADS05ASRF5 1L10 top cl
DRADS05ASRF6 1L10 WG 5&6
DRADS05ASRF7 1L10 WG 7&8
DRADS05ASRF8 n/c
DRADS05ASRF9 1L10 Supply (US) BL
DRADS05ASRF10 1L10 Return (DS) BL
DRADS05AHVMON
All 7 chs. read normal background counts ~13:45 on 18Feb2026. HV bias is off.

Log Number: 4471876Logbook(s): 

• ELOG
• SRFPLASMA

Body: 

Moved DecaRads from 1L23 to 1L25, so these DecaRads are now ready to support post-plasma FE measurements:

1L05 (on DRADN05BSRFxx)
1L10 (on DRADN11ASRFxx)
1L25 (on R1PXDRADxx)

Details at:
https://tasklists.jlab.org/atlis/tasks/118604#