Difference between revisions of "WAC Notes November 12 2020"
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* Slug 186 - 7635 - ''BPM 1 YP wire looks fishy'', otherwise OK. Some BPM 12X noise, very brief. Same FFB noise problems as before. | * Slug 186 - 7635 - ''BPM 1 YP wire looks fishy'', otherwise OK. Some BPM 12X noise, very brief. Same FFB noise problems as before. | ||
| − | ==== Slug 187 ==== | + | ==== Day 2 - Slug 187 ==== |
After a day of work we get more data, with still bad FFB for a while and adjusting tunes. | After a day of work we get more data, with still bad FFB for a while and adjusting tunes. | ||
| Line 48: | Line 48: | ||
Runs: | Runs: | ||
* Slug 187 - 7657 - '''was marked as suspicious''' - Just normally noisy run, should be fine. | * Slug 187 - 7657 - '''was marked as suspicious''' - Just normally noisy run, should be fine. | ||
| − | * Slug 187 - | + | * Slug 187 - 7658 - expect detector slopes to change, as there was a gang phase adjustment. Compton rates and BPM noise gets muuuch better |
| + | |||
| + | |||
| + | ==== Slug 188 ==== | ||
| + | Relatively stable running, FFB is now less problematic (still not great) - https://logbooks.jlab.org/entry/3826256 | ||
| + | * Slug 188 - 7681 - Some BPM 12X large noise | ||
=== Sakib === | === Sakib === | ||
Revision as of 16:22, 9 November 2020
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PREX Main << Weekly Analysis Coordinator << WAC Notes CREX << WAC Post-Run_Meeting Notes
WAC Notes November 5 2020 << >> WAC Notes November 19 2020
Organization
Date and time: November 12, 2020, 11:00am
Bluejeans ID: 454783784
Meeting link: https://bluejeans.com/454783784
Runlist spreadsheet
Suggested Changes
Each WAC will suggest changes for their run period, which will be discussed at this meeting:
Cameron
Beginning of run period 2 - Slug 186
Beginning of the second run period. It is in identical conditions to how we left in March.
Pedestals:
- The pedestals were obtained AFTER the run began, so the first set of pedestals (or global pedestals) need to be updated and back-propagated to this run period as well.
Cuts: Stability cuts were removed, due to the FFB noise in BPM Ys - https://logbooks.jlab.org/entry/3824620
Runs:
- Slug 186 - 7626 - was not included before - is the very first run, it has 5 sigma Aq (no Aq feedback) and FFB commissioning/noise, but otherwise is fine
- Slug 186 - 7627 - was included before - Has 2 sigma Aq (bad Aq feedback). Also, FFB turning on an off is a mess, but as far as I can tell, there is no negative impact on slopes or corrections (so it should be tolerated)
- Slug 186 - 7628 - needs cuts - One very brief 1.5 mm 12X jump
- Slug 186 - 7630 - needs cuts - Another brief 1.5 mm 12X jump
- Slug 186 - 7631 - needs cuts - Another brief 1.5 mm 12X jump
- Slug 186 - 7632 - Really huge FFB noise... is it worth keeping the 150um + BPM Y RMS data? X is OK.
- Slug 186 - 7634 - Really huge FFB noise still
- Slug 186 - 7635 - BPM 1 YP wire looks fishy, otherwise OK. Some BPM 12X noise, very brief. Same FFB noise problems as before.
Day 2 - Slug 187
After a day of work we get more data, with still bad FFB for a while and adjusting tunes.
Also, counting mode alignment run verified the HRSs see different accepted rates (same positions as March running) - https://logbooks.jlab.org/entry/3825555
Runs:
- Slug 187 - 7657 - was marked as suspicious - Just normally noisy run, should be fine.
- Slug 187 - 7658 - expect detector slopes to change, as there was a gang phase adjustment. Compton rates and BPM noise gets muuuch better
Slug 188
Relatively stable running, FFB is now less problematic (still not great) - https://logbooks.jlab.org/entry/3826256
- Slug 188 - 7681 - Some BPM 12X large noise
Sakib
Weibin
Victoria
Robert
General
- Need global cuts on ATs
