20200511-Optics-Mtg

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Logistic information

 Toll-Free Number (U.S.&  Canada):  888-240-2560
 PARTICIPANT CODE:                  # 585 129 220
 Room IRL:                            <none>

Agenda

Please post slides in haplog or docdb, before the meeting

  1. Siyu - Dp shift check
    • look at central value +/- error on parameter (not RMS) to get the error from the fit on the separation
    • do this for each of the momentum settings (and ultimately, do this for each of the holes in the sieve)
    • use error propagation to see how recoil energy difference or derived scattering angle depends on beam energy, scattering angle...
  2. Ryan:
  3. Kent
    • more details about tasks for PREX and transverse asymmetry prelim results

Minutes

  1. Siyu
    • estimates 1% bias in central angle from watercell, due to bias in carbon calibration data.
    • Necessary to correct the field point using readback on magnet fields
    • Could be caused by energy difference. Look at Right arm. Look at energy value from epics (get Devi's help for how to do this).
    • May also need to keep track of beam position on target - corrections may be required for this (at least for watercell data).
    • Will look into multiple measurements for both carbon and watercell.
  2. Ryan
    • Finds significant residuals in available database for left arm... Siyu will make sure the final optimized database is available.
    • Finds significant theta residuals, maybe due to error in residual calculation? Will check into it
    • Next is to try to dp residuals also (when he gets optimized data base from Siyu)
    • Eventually, should reproduce Q2 (semi-)independently


Attendence

Siyu, Ryan, Nilanga, Bob, Dustin, Devi, Chandan, Kent