Aggregator

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#

Log Number: 4471875Logbook(s): 

• ELOG
• INCLOG

Body: 

Finished installation at 2L25.
Waiting for warm region girder to be installed and vacuum to be establish to connect cables downstairs.
C100 chassis needs to be flashed with new firmware and screens updated for new gauging.

Began work at 2L26.
Installed B-Rax controllers in rack and began routing cables in rack.
HV and convectron cable has been terminated downstairs for 2L26.
Will continue work at 2L26 tomorrow morning.

Log Number: 4471874Logbook(s): 

• ELOG

Body: 

Moved DecaRad system to 1L25 to support post-plasma checks (removed from 1L23.)
1L25 Readbacks are via the 1L25 C100 RF Expert screen/RF DecaRAD, (Rf12ExpertMenu.edl)
__Drad Ch.__ /__Location__
R1PXDRAD01 1L25 WG 1
R1PXDRAD02 1L25 WG 2
R1PXDRAD03 1L25 WG 3
R1PXDRAD04 1L25 WG 4/5
R1PXDRAD05 1L25 top cl
R1PXDRAD06 1L25 WG 6
R1PXDRAD07 1L25 WG 7
R1PXDRAD08 inop (1L25 WG 8)
R1PXDRAD09 1L25 Supply (US) BL
R1PXDRAD10 inop (1L25 Return (DS) BL)
R1PXDHVMON

8 out of 10 chs. show normal background counts.
HV bias is now off.
1L25 ch.

Log Number: 4471873Logbook(s): 

• ELOG
• POLOG

Tags: 

• Autolog

Body: 

Log Number: 4471872Logbook(s): 

• ELOG
• POLOG

Tags: 

• Autolog

Body: 

Log Number: 4471871Logbook(s): 

• ELOG

Body: 

New V-Blocks are Fabricated they will be installed tomorrow morning asap, Looks like we will be able to do these V-Block's install very easily.