Moller Polarimeter Upgrading for PREx in 1)Mollar Analysis & Upgrading Works during/after 2009 PVDIS 2)Flash ADC based DAQ dead-time measurement 3)Future Plan Moller Polarimeter Project in the Hall-A Collaboration Brad Sawatzky (now in Hall-C), Zafar Ahmed, Alexandr (Sasha) Glamazdin, Pomatsalyuk Roman, Robert Michaels, Eugene Chudakov (now in Hall-D)
PAW (Fortran) ROOT (C++) Refer to Sasha & Brad’s talk given on Feb Moller Target upgrading Moller Super-Conducting Magnet upgrading DAQ upgrading (Flash ADC based DAQ) 'DATA' Trigger 'HELICITY' Trigger
MPS Scaler of Helicity Trigger Types: MPS Scaler of Helicity Trigger Types: single L/R rate, BCM, 100 kHz clock H+H-
MPS Scaler of Helicity Trigger Types: MPS Scaler of Helicity Trigger Types: Moller Target Ladder Position Info.
Data Trigger Types: Data Trigger Types: Digitized Waveforms Energy Deposited no pedestal subtraction
Data Trigger Types: Data Trigger Types: Energy Deposited coincidence Moller signal events
Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm / / / / Right arm / / / / Coincidence / / / / BCM / / / / Timer / / / /
Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm / / / / Right arm / / / / Coincidence / / / / BCM / / / / Timer / / / / / / / / Moller measurements: rates/sec and asymmetries run Left Right Coinc. Accid. BCM Clock Raw Asymmetry Polarization L-Asymmetry R-Asymmetry BCM
Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm / / / / Right arm / / / / Coincidence / / / / BCM / / / / Timer / / / / Moller measurements: rates/sec and asymmetries run Left Right Coinc. Accid. BCM Clock Raw Asymmetry Polarization L-Asymmetry R-Asymmetry BCM / / / /
Analysis Result Comparison no cut but BCM > 50 Zafar’s result Run 321 (14048) /?kHz Run 322 (14049) /109.5kHz Run 323 (14050) /59.55kHz Run 324 (14052) /218.9kHz Run 325 (14052) /274.67kHz My result Run 321 (14048) /185.56kHz Run 322 (14049) /109.65kHz Run 323 (14050) /58.33kHz Run 324 (14051) /218.88kHz Run 325 (14052) /275.19kHz
Coincidence Counting Rate Flash ADC based DAQ v.s. old DAQ
Dead-Time Measurement
Asymmetry Measurement
Future Plan: After adding scintillators, the code should be changed. Next week, work with Sasha, Roman, and Ahmed to complete the on-line panguin Moller analyzer.