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COMMENT ON C75-05 (2L03) SRF Cryomodule Commissioning
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.
DecaRads are on 1L05, 1L10, 1L25
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#
COMMENT ON SL25 and SL26 vacuum controls and cable installation for reworked 2L25/2L26 girders
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.
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
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.
Gun HV Turned Off
Gun HV Rampdown Initiated
COMMENT ON Removal and Installation of Girders 2L25A & 2L26A
COMMENT ON Plasma processing during the Fall 2025 SAM
Recommend closing task, in favor of 118604, Post SAM FE onset measurements C75 and C100 cryomodules.
https://tasklists.jlab.org/atlis/tasks/118604
COMMENT ON Flash new firmware on all C-100 and GP Series Vacuum Control Chassis (SAM 2025-26)
Flashed new firmware to vacuum controls in zone SL25 (SL25SRFVAC)
-Ver x0701 (2-Valve Controls with support for new warm region girder gauging)
Flashed new firmware to vacuum controls in zone SL26 (SL26SRFVAC)
-Ver x0801 (3-Valve Controls with support for new warm region girder gauging)
HYST AREA 7-0 Cycles Magnets
HYST AREA Version 7-0 has successfully cycled the following:
MBC3R10H
MBC3R10V
MQA5R10
MBC5R10H
MBC5R10V
MQA7R10
MBC7R10H
MBC7R10V
MBC9R07V
MBT1R09H
MQA3R09
MBC3R09H
MBC3R09V
MQA3R10
MBC7R09H
MBC7R09V
MBM9R08H
MBC7R10AH
MQA9R07
MBC9R07H
MQB1R10
MBT1R10H
MBT1R10V
MQA3R08
MBC3R08H
MBC5R09H
Total Time: 2.933 mins
HYST AREA 7-0 Cycles Magnets
HYST AREA 7-0 Cycles Magnets
COMPLETED Remove West Arc to BSY crossover beam pipe
The following cavity histories have been updated: Zone 2L23
The following cavity histories have been updated:
Zone 2L23
Username: kerns
Date/Time: 02-18-26_13:38:00
RF Status: Good
Comment: Soft MDP breaker trip reset. Bay 1 had a low DSP battery fault reset also.
Special Instructions:
Maintenance Tag: Component: CPS Components
The following cavity histories have been updated: 2L25-7
The following cavity histories have been updated:
2L25-7
Username: kerns
Date/Time: 02-18-26_13:30:18
RF Status: Good
Tuner Status: Good
Comment: Arc detector replaced and tested afterwards.
Special Instructions:
Maintenance Tag: Component: Arc Detector {Removed SN: 000, Replacement SN: 040}
COMMENT ON Legacy SRF Vacuum Control Crate General Maintenance (2026-2027)
COMMENT ON Powering Up and Performing HCO on 10 AMP & 20 Amp Trim System after SAM 2025
Verifying setup to 1D
Quickly checked that the prebuncher was correctly phased, choppers phased, and all beams in the correct bucket. All looks well after finding that the laser work had meant that the A laser phase needed to be corrected. A scan of Chopper gang phase showd we are central through all 3 holes. No interception on A1, A2, and MS. All save #26673










