20200310-PREX2-Analysis

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Logistic information

Meeting room at JLab: CC L210A

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Agenda

  1. Devi
    • AT detectors [HAPLOG4047]
    • Respin1 results: no big change compared with prompt results
    • correction compared between LRB/postpan/dithering :
      • device_error_code in LRB and dithering cleans up outliers
      • DM: do you known what's the acceptance of AT. RyR: ATL1 sits at different position
      • beyond slug 56: AT position moves around
      • TY: what's the difference between dithering and regression? KP: You need to look at error bars and correlations to compare the central values.
      • KP: we need to look at regression at different BPM sets. PK: we can look at grand correlation. KP: you can correct detectors using dithering slopes.
      • KP: why is chi square too small in atr_dd
      • KP: And we need to know the Qsq difference between them
      • Blinded AT: KP : what is the denominator in the Asymmetries. DA: actual yield with beam off pedestal.
      • KP: why the error bar is bigger after slug 70 ? DA: maybe we move it around and it loss rate.
  2. Tao
    • residual sensitivity [HAPLOG 4048]
    • PK : slug 72, you can compare the slopes from regresion
    • CG : you can also check halog for beam tune changes
    • KP : we need to have a legend /notation for dithering plots. TY: will do.
  3. Devika
    • cavity bpm resolution [HAPLOG 4049]
    • Calculation of scale factor for cav4c
    • KP: do you have plots how you extract scale factor?
    • KP: do we know why the y resolution worse than x resolution. CP: maybe beam is centering at the cavity.
    • PK: Are you using the raw position in your calculation? it might be a pedestal issue when y is centered.
  4. Checklist / to-do list
    • Are plots/summary text files properly uploaded to the webpage? Any rootfiles missing ? (Robert)
    • Review beam mod data : run ranges for averaging slopes, bad supercycle cuts , residual sensitivity and etc. (Victoria)
    • review event cuts/ mapfiles / data (Weibin / Tao)
    • keep track of issues : [HAPLOG 4044]

Analysis projects

  1. BCM double difference study
  2. BPM resolution
  3. Pedestal / Normalization BCM history
  4. Events/ Patterns Counter
  5. Dithering sensitivity/Quality re-check
  6. Grand statistics re-check
  7. Linearity check

PREX Respin

  1. Robert:

Present

  • JLab: Tao Y
  • Phone: Caryn P, Chandan G, Devi A, Devika P, Kent P, Ryan R, Silviu CD, Victoria O, Weibin Z, Yufan Chen, Paul K, Dustin M, Don J, Ciprian G, Siyu Jian.

Excused