Fig. 1
Noticed A3 interception would gently rise into FSD trip again and again. Eventually, A3 interception will hit a peak of ~0.5 and plummet to essentially zero.
Fig. 6,7
Repeated BLA trips from suspected injector discharge
Once after beam is restored, A4 interception will spike up and then drop by ~30% or so and flatten out
Some following trends to the A3 rise are shown in the Figures below,
BPM 0I05
BPM 0L09
Hall D current and Ion Chambers
...
Noticed the 1A SLM looked terrible and 6S01 IDX was increasing, so tried to fix that. The spot looked much better after moving the NL GP knob to the left, but I noticed a spike in 6R10 and 5S01 IDX so I backed off some of those changes. Beam doesnt look as nice on the SLM but the IDX rates were better.
Fig 1) 1A SLM before
Fig 2) 1A SLM after first correction
Fig 3) 1A SLM after backing off some of the corrections
Fig 4) plot of these 3 IDX vs GP
Fig 5) IDX summary after adjustments
The OPS DRVHs for the following cavities have been updated:
1L05-4
Username: eforman
Date/Time: 05-24-26_16:51:49
RF Status: Good
Tuner Status: Good
Comment: DRVH=18.700 Tripping frequently & suspect beam instability when running 60 uA to xC
Previous OPS DRVH: 19
Special Instructions: to run LEM at 940
Start of shift: Restoring to Halls
| Shift | Swing |
|---|---|
| CEBAF Program | |
| MCC Crew Chief | Forman |
| MCC Operators | Christian, Yoon |
| Program Deputy | Saitiniyazi |
| Announcements |
