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2L13-8 Unbypassed to check after 2.5 W amp put back in

9 hours 14 minutes ago
Log Number: 4532893Logbook(s): Entry Makers: kernsBody: 

After tuner issues and 2.5w robbed and re-installed, unbypassed to check and found no KCCU on cavity. This will need opened and klystron jumper re-installed. Re-bypassing it on State Page only, still stepped off. Also documenting iir2 vacuum interrupt/P1 FSD faults turning on RF (RFCM most likely since I don't see vacuum problem without RF when turned on at 0 Mv/m. ).

kerns

The following cavity histories have been updated: 1L02-6

9 hours 43 minutes ago
Log Number: 4532885Logbook(s): Tags: Body: 

The following cavity histories have been updated:
1L02-6
Username: kerns
Date/Time: 07-28-26_13:03:19
RF Status: Good
Tuner Status: Good
Comment: Replaced the RFCM and drive cable but still has CRFP regulation above 4Mv/m and low Drive. Needs 2.5W amp and drive cables checked
Special Instructions:

Maintenance Tag: Component: RFCM {Removed SN: 267, Replacement SN: 227}

kerns

1L02-6 Unstable at above 3 Mv/m with Beam

9 hours 46 minutes ago
Log Number: 4532884Logbook(s): Entry Makers: kernsBody: 

CRFP fluctuacting above 3 Mv/m with very little drive and 0.5 db RATN. Replaced the RFCM even though it had a -7dbm output (great) thinking it might be a phase regulation problem but it still had same issue with bad regulation above 3 Mv/m. Leaving the cavity set at 4 Mv/m until 2.5w amp and drive cables can be checked/replaced since it is stable at 4 Mv/m now. If it beam loads, might need to turn it down to 3 Mv/m again.

kerns

RF Module Downloads

10 hours 45 minutes ago
Log Number: 4532874Logbook(s): Body: COMMENTS: RFCM replaced due to CFQE problem but drive upconv. was good at -7 dbm. Low drive in cavity means 2.5w needs checked/replaced. 3 Mv/m max with 0.0 db RATN.


The following module files were successfully downloaded
nl026e nl026d
kerns

Contacted facilities about standing water behind 1L06 at NL service building

10 hours 50 minutes ago
Log Number: 4532873Logbook(s): Entry Makers: alexsBody: 

Following up from the HPA cooling fault on owl shift, RF investigated reports of ~1 in of standing water in the 1L06 HPA cabinet. The source of the cooling fault was attributed to an LCW flow rate set a little too close to the trip point, and increased up to a healthy 55 GPM. The water was determined to be from standing water found outside the back of the service building leaking inside and pooling in the cableway and HPA. Facilities has been informed about the standing water outside.

alexs

Setup for Moller beam study

11 hours 56 minutes ago
Log Number: 4532863Logbook(s): Entry Makers: brukerBody: 

Trying to reproduce the 6/6/26 setup, log #4509021.
Note: VWien calibration has changed, setpoints are going to be several percent lower than before for the same spin angle.
Also, we can't restore blindly because of spot move, phase changes, etc. To avoid repeating the setup from scratch, I'll import only the INJ-I magnets from save #27283 (VWien at 23.25 degrees per the calibration saved at the time, HWien off) but exclude MBH2I00H/V and MBH2I00AH/V.

bruker

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