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COMMENT ON Install C-100 style Vacuum Controls and Cable Install SL03 (2025-2026 SAM)
VIP2L03A was not pumping down as it should and is being replaced. This will disable the interlock for VBV2L03A and prevent RF testing.
A resistive load box will be connected to the VIP2L03A power supply and simulator relay will be installed on that VBV2L03A control channel to temporarily make up the interlock for RF testing.
COMMENT ON Removal and Installation of Girders 2L03A & 2L04A
The following cavity histories have been updated: 2L12-1
The following cavity histories have been updated:
2L12-1
Username: kerns
Date/Time: 02-17-26_14:03:50
RF Status: Good
Tuner Status: Good
Comment: RFCM replaced for no comm.
Special Instructions:
Maintenance Tag: Component: RFCM {Removed SN: 245, Replacement SN: 70}
The following cavity histories have been updated: 2L18-4
The following cavity histories have been updated:
2L18-4
Username: kerns
Date/Time: 02-17-26_14:01:15
RF Status: Good
Tuner Status: Good
Comment: RFCM replaced for bad comm's preventing HV.
Special Instructions:
Maintenance Tag: Component: RFCM {Removed SN: 119, Replacement SN: 218}
The following cavity histories have been updated: 2L14-2
The following cavity histories have been updated:
2L14-2
Username: kerns
Date/Time: 02-17-26_13:57:00
RF Status: Good
Tuner Status: Good
Comment: RFCM unbypassed and replaced for KMAI/comm problem.
Special Instructions:
Maintenance Tag: Component: RFCM {Removed SN: 245, Replacement SN: 103}
COMMENT ON Align YBBS06 and associated beam pipe
COMMENT ON Reconnect Magnet Leads @ Girders 2L03A & 2L04A, 1L26A and 1L27A and at 1L26 and 1L27
Re-connect magnet leads @ 1L25, 1L26 and 2L04.... @ 1L25 will had to re-terminate the magnet leads due to bad RAD damage cables that was causing the magnet to be open. 1L26 was rotated by Magnet Test , and we re-connected the magnet leads. 2L04 magnet leads was re-connected. We still need to do polarity check on these magnets.
Banks, Diggs
RF Module Downloads
COMMENT ON MST magnet installation and related magnet work at 1L09,2L03, 2L25, 1L26
RF Module Downloads
Follow-up Re: South Cryo performing much better than North (RF on --> off)
Plot the cryomodule JT valve positions for all NL cryomodules and look for the ones where the JT's move the most when RF is turned on and off.
Those will be the modules whose cavities need to be investigated further as this indicates a large heat compensation mismatch.
The JT valve bullets are equal percentage so in general, a position change of 15% is a doubling or having in the mass flow.
For example:
1L10, 1L14, 1L17 move about 10% each. This is a big heat change.










