WAC Notes February 19 2020

From PREX Wiki
Jump to: navigation, search
Documentation
HOW TOs for shift crew
Expert Tools
All Expert Contacts



PREX Main << Weekly Analysis Coordinator << WAC Notes CREX << Instructions

WAC Notes February 18 2020 << >> WAC Notes February 20 2020

February 19 2020

Daily Meeting BlueJeans

Production Run List - Slug 138 - IHWP OUT - Flip-LEFT - Production

Slug starts at about 10:30 A.M., spot size 138x 149 compared to 133x169 for slug 137

  • Good - Run 6514
    • Reestablishing 150 uA on Ca48. Only one minirun. Switched from using 1X instead of 4aX for regression.
  • Good - Run 6515
    • Running with FFB on but FF off (it wasn't working). Most glaring feature occurs when running beam mod cycle. FFB gets paused and the positions in bpm4aX,4eX change (~0.3mm). Not reflected in detector yields.
  • Good - Run 6516
  • Good - Run 6517
  • Good - Run 6518
    • BCM sees some noise later in the run. It goes away.
  • Good - Run 6519
  • Good - Run 6520

After BMW, decided to run with FFB off and monitor the dpp. [1]

  • Good - Run 6526
    • First run without FFB. Both the raw detector widths are larger. Slight increase in the detector RMS. BPM 4aX,4eX,16X noisier. BPM 4aX,4eX,12X rms is larger.
    • Interestly, this run begins a transition where the bcm width gets smaller (looking at slug summary plot). (~220 ppm to <200 ppm)
    • Energy slope drops from -46 to -43 [2]
  • Good - Run 6527
  • Good - Run 6528
  • Good - Run 6529
    • Brief moment where the BCM asymmetry width gets above 450 ppm. This goes away
  • Good - Run 6530
    • Outlier in regressed usl,usr and us_avg in minirun 0. RMS ~ 850 ppm. Seems to correlated with a sharp energy drift looking at bpm12X.
  • Good - Run 6531
  • Good - Run 6532

Non-Production Runs and Bad Runs

  • run6521 --> Test
  • run6523 --> Test (Carbon 1%, BMW test)
  • run6524 --> Test (Carbon 1%, BMW test)
  • run6515 --> Test (Labeled as production but it was test run. There is no data in it.)


Issues

  • Feed forward not working.
  • Ran with FFB on, but FF off. This has a consequence for dithering analysis. There was no energy response in coil 7 during this time.
  • For dithering. Run 6526 and beyond have the coil sensitivity. Need to think about what to do with runs before 6526
  • Interesting observation. Looking at regressed bcm_an_us slopes, there seems to be a correlation with charge and position. For example, looking at the 1X slope, it is nonzero ~ 8. The energy correlation is consistent with zero.

Something to keep an eye out for

Updates