WAC Notes August 26 2020

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WAC Notes August 25 2020 << >> WAC Notes August 27 2020

August 26 2020

Daily Meeting BlueJeans

Production Run List - Slug 203 - IHWP IN - Flip-RIGHT - Production

• Good - Run 7993
• NeedCut - Run 7994 -- even after cutting out 110k-115k entries, the shift in bpm12X is still larger than 1mm, need further offline analysis. 2 bpm12X positions
• Good - Run 7996
• Good - Run 7998
• Good - Run 7999
• Good - Run 8000
• Good - Run 8012 -- obvious energy shift, resulting in drop of yield in both arms. 2 bpm12X positions
• NeedCut - Run 8013 -- trippy in the last 100k entries (minirun 5), resulting in larger width, cut out some large excursions to bring down the reg_asym_us_avg rms
• NeedCut - Run 8014 -- large bpm12X excursion (minirun 2: large reg_asym_us_avg.rms ~950 ppm)
• Good - Run 8015

Production Run List - Slug 204 - IHWP OUT - Flip-RIGHT - Production

• Good - Run 8001 -- short run, only ~5.5k good patterns
• NeedCut - Run 8002 -- large bpm12X spike, 2 bpm12X positions
• Good - Run 8003
• Good - Run 8004

Non-Production Runs and Bad Runs

• Junk - Run 7992 -- C-1%
• Junk - run 7995 -- C-hole
• Junk - Run 7997 -- C-hole
• Junk - run 8005 -- no beam
• Junk - Run 8006 -- C-1%
• Junk - run 8007- 8011: machine work and compton rate

Issues

• Compton background rate crosses line frequently
• large bpm12X excursion, unstable dpp
• 60 Hz noise in BMod: https://logbooks.jlab.org/entry/3834843
• a few 2 bpm12X positions runs: 7994, 8002, 8012

Updates

• energy slope increase from -37 ppm/mm (run 8000) to -43 ppm/mm (run 8012): because of the tune in 0L04 and 0L09: https://logbooks.jlab.org/entry/3834997, https://logbooks.jlab.org/entry/3834985. This affect slug 203 and 204
• Ye increases the dithering amplitudes in order to reduce the interference of 60 Hz noise: https://logbooks.jlab.org/entry/3835272