Difference between revisions of "20200923-PREX2-Analysis"
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== Agenda == | == Agenda == | ||
| − | # Ye Tian : bpm linearity | + | # Ye Tian : bpm linearity [http://ace.phys.virginia.edu/HAPPEX/4252 HAPLOG] |
#* common phase shift in BPMs between modulation func gen. | #* common phase shift in BPMs between modulation func gen. | ||
#* Tao Y: do you see the same phase shift in detectors ? | #* Tao Y: do you see the same phase shift in detectors ? | ||
| Line 27: | Line 27: | ||
# Saturday meeting schedule | # Saturday meeting schedule | ||
#* Oct. 3rd | #* Oct. 3rd | ||
| + | |||
== Present == | == Present == | ||
Tao Y, Adam Z, Ciprian G, Devi A, Devika B, David A, Don J, Ezekiel W, Guido U, Jim N, Juliette M, Kent P, Paul K, Ryan R, Hanjie L, Caryn P, Sakib R, Siyu J, Victoria O, Ye Tian, Yufan C, Cameron C, Sanghwa P, Eric K, Silviu CD | Tao Y, Adam Z, Ciprian G, Devi A, Devika B, David A, Don J, Ezekiel W, Guido U, Jim N, Juliette M, Kent P, Paul K, Ryan R, Hanjie L, Caryn P, Sakib R, Siyu J, Victoria O, Ye Tian, Yufan C, Cameron C, Sanghwa P, Eric K, Silviu CD | ||
Revision as of 12:47, 23 September 2020
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Logistic information
Time: Wednesday 11am-noon Meeting room at JLab: REMOTE ONLY
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Agenda
- Ye Tian : bpm linearity HAPLOG
- common phase shift in BPMs between modulation func gen.
- Tao Y: do you see the same phase shift in detectors ?
- Ye Tian: phase shift angle is limited between 0-180 degree as a fitting parameter.
- Kent P: 60 Hz phase shift is random for supercycles and gets cancelled by averaging.
- Dave A: is 60 Hz noise caused by real beam motion, monitors or detectors electronics?
- Ye Tian: p2*x/p1 is defined as non-linearity.
- Kent P: what is the error for each slugs? Ye Tian: p1 and p2 error from fit over phase-averaged points.
- Kent P: width of the histogram seems consistent with the error bar.
- Kent P: this provides a way different from PITA scan to check detector linearity. Small pedestal deviation in BPM may be sensitive to charge asymmetry.
- Kent P: we can look at nonlinearity for each individual detector as well, eg usl and usr.
- Saturday meeting schedule
- Oct. 3rd
Present
Tao Y, Adam Z, Ciprian G, Devi A, Devika B, David A, Don J, Ezekiel W, Guido U, Jim N, Juliette M, Kent P, Paul K, Ryan R, Hanjie L, Caryn P, Sakib R, Siyu J, Victoria O, Ye Tian, Yufan C, Cameron C, Sanghwa P, Eric K, Silviu CD
