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1L10-3&4 Possible Tuner Microphonics
QuickPic - 1L09-1&2 Possible Tuner Microphonics
iocsoftw4spce restored
iocsoftw4spce restored with warnings
xC request 5uA, walking up towards 15uA
iCalibrate: Hall C
It is not 300 Hz that we should be looking for it is 1495 Hz and 72-ish Hz. Probably in the south linac.
I spent most of the day dealing with data that I took using the SEE BPMs with sample and hold cards that were instrumented using the LabJACK hardware put in place by the I&C folks with software developed by Brian Bevins. In addition to maybe getting a handle on what is going on with the beam I found a few features for Brian to address later.
Noted Scraping w/o C Beam to Lock to
I noted some irregularity in current going to Hall B as well as an increase in gamma rates on the IDXs in 5S, 6R, and 2C. I did not realize the severity of the scraping in 2C as the IDX plot on the wall did not have these new detectors on it.
Threw the hall dumplets in, crested gangphase in the NL and SL, ran lower pass locks with C, higher pass locks with B, and all was well. Positional stability and halo rates in B are markedly improved, though that may partially be due to some PID gains I have been tweaking (log incoming) for their orbit lock.
QuickPic - 90.0467 F
Downtime Incident CLOSED: Beam scraping observed, running tune to dumplettes
Downtime Incident CREATED: Beam scraping observed, running tune to dumplettes
ATLis Comments Daily Digest
FSD Masking Tool: Successful System UN-Masking for: BeamLossMonitor
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IL
FSD Masking Tool: Successful System Masking for: BeamLossMonitor
User: bschauml
Areas: All
BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
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xC request BNR
Operator SIGN IN
Operator SIGN IN
Operator SIGN IN
1L10-2 PMES is a little unstable
Looking at PMESmax-PMESmin from the wf scope. All cavs except for 2 show no noise beyond the deadband of the archiver.
Looks like the phase could be moving by as much as a degree. Assuming it's on crest, it wouldn't be that much of an energy shift, about 0.0007 MeV. Probably still worth looking into.










