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.