Difference between revisions of "WAC Notes July 17 2019"
From PREX Wiki
Jump to navigationJump to search| Line 16: | Line 16: | ||
[[Main_Page|<B>PREX Main</B>]] << [[Weekly Analysis Coordinator]] << [[WAC|Instructions]] | [[Main_Page|<B>PREX Main</B>]] << [[Weekly Analysis Coordinator]] << [[WAC|Instructions]] | ||
<br><br> | <br><br> | ||
| + | No Prior Day << >> [[WAC Notes July 18 2019]] | ||
| − | = July 17 2019 = | + | = July 17 2019 Day Shift = |
* WAC = Cameron Clarke | * WAC = Cameron Clarke | ||
* Slug 3 | * Slug 3 | ||
Revision as of 22:37, 17 July 2019
| Documentation |
| HOW TOs for shift crew |
| Expert Tools |
| All Expert Contacts |
In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.
PREX Main << Weekly Analysis Coordinator << Instructions
No Prior Day << >> WAC Notes July 18 2019
July 17 2019 Day Shift
- WAC = Cameron Clarke
- Slug 3
- Beam Status
- OWL had ~7 hours of beam, with some sketchy BPM noise and clear BCM DD problems
- Major issue: BCM Upstairs Black box noise on AN_US
Production Run List (status at 6pm 7/17/2019)
- Cut first 30k events out: 3398
- Good: 3399
- Good: 3400
- Good: 3401
- Good: 3402
- Good: 3403
- Good: 3404
- Good: 3405
- Good: 3406
- Good: 3407
Non-Production Runs and Bad Runs
- Calibration (BPM): 3395 - HALOG
- Calibration (BCM): 3396 - HALOG
- Calibration (Restore Beam): 3397 - HALOG
Pedestal/Calibrations Updates
- Tao's Pedestal Update
- Using: prexCH_beamline_pedestal.3396.map for 50uA runs from slug 3 onward - new BPMs in ARC need attention
- Using: prexCH_beamline_pedestal.3395.map - use it as a template pedestal map for 70 uA runs.
- I've taken prexCH_beamline_pedestal.3396.map and placed it in the prexCH_beamline_pedestal.3390-.map
- Caryn's Hall C and cav4cQ pedestals (3373 and 3378 respectively)
Issues
- Tuning 3397 - HALOG
- Charge Feedback glitch: non-fatal QW Feedback process fighting with Analysis Minder - HALOG, HALOG
- OPS FFB on: for a few minutes of run 3398 - HALOG
- Strange beam motion at beginning of 3398 - HALOG
- BCM Noise/phase lag question: Begins run 3400, varies, investigated on scope, looks like BCM black box issue - HALOG, Sakib noted, Victoria noted
- Looked at on a scope with Tune Beam and changing all cables isolates it to a electronics/hardware issue in the Upstairs black box, not downstairs.
- This will need to be fixed, but probably the data is fine.
- BPMs have strange noise, especially 4eY: Beings run 3399 - HALOG
- Compliment BPMs don't have this noise (anecdotal), and their DDs w.r.t. normal BPMs is noticeable - HALOG, HALOG 2
- At Left 1 is - w.r.t. At Left 2, and this isn't mirrored in Right - Devi says this is beam related, and HVs were off...
- Main Detectors R vs. L correlations shift in time? -> Kent says this is normal and has to do with beam motion sensitivity - HALOG
- LHRS Dipole moved a bit - HALOG, [1]
Other Status Updates
- Beam Mod is OK - HALOG
- Aq is working, nothing more than ~0.2 ppm mean charge asymmetry over a given run, many sub 0.02 ppm - See Online Plots
- SAM pedestals made SAM 8 look like a negative signal, was spurious, Devi is fine with it
