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:
   • verifying the PREX database - Looking at Theta-Phi Optimization
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