1. Moller Polarimeter Upgrading for PREx in Hall-A@JLab 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)

2. PAW (Fortran)  ROOT (C++) Refer to Sasha & Brad’s talk given on Feb. 2010  Moller Target upgrading  Moller Super-Conducting Magnet upgrading  DAQ upgrading (Flash ADC based DAQ) 'DATA' Trigger 'HELICITY' Trigger

3. MPS Scaler of Helicity Trigger Types: MPS Scaler of Helicity Trigger Types: single L/R rate, BCM, 100 kHz clock H+H-

4. MPS Scaler of Helicity Trigger Types: MPS Scaler of Helicity Trigger Types: Moller Target Ladder Position Info.

5. Data Trigger Types: Data Trigger Types: Digitized Waveforms  Energy Deposited no pedestal subtraction

6. Data Trigger Types: Data Trigger Types: Energy Deposited coincidence Moller signal events

7. Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm 5212.4 153850.2+/-8784.5 -0.02808+/-0.04038 -0.02807+/-0.00011 -0.43123+/-0.00171 Right arm 3489.8 103004.1+/-6026.8 -0.03108+/-0.04134 -0.03107+/-0.00014 -0.47735+/-0.00209 Coincidence 1976.9 58349.7+/-3491.7 -0.04490+/-0.04223 -0.04489+/-0.00018 -0.68964+/-0.00277 BCM 267.7 7900.4+/-414.9 -0.00002+/-14.05609 0.00013+/-0.00049 0.00000+/-0.00000 Timer 3388.1 100004.1+/-188.6 0.00000+/-0.00000 0.00000+/-0.00000 0.00000+/-0.00000

8. Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm 5301.6 156482.3+/-2988.7 -0.02983+/-0.01356 -0.02977+/-0.00013 -0.45741+/-0.00193 Right arm 3554.7 104921.1+/-2260.9 -0.03306+/-0.01529 -0.03300+/-0.00015 -0.50694+/-0.00236 Coincidence 2014.4 59455.9+/-1535.0 -0.04766+/-0.01829 -0.04760+/-0.00020 -0.73131+/-0.00313 BCM 272.4 8041.1+/-98.2 -0.00006+/-3.32557 0.00014+/-0.00056 0.00000+/-0.00000 Timer 3388.1 100002.8+/-47.2 0.00000+/-0.00000 0.00000+/-0.00000 0.00000+/-0.00000 14050 147040 101040 55792 295. 8518. 101155 -0.0477+/- 0.0002 -0.8818+/- 0.0036 -0.0306+/-0.0001 -0.0335+/-0.0001 0.00002 Moller measurements: rates/sec and asymmetries run Left Right Coinc. Accid. BCM Clock Raw Asymmetry Polarization L-Asymmetry R-Asymmetry BCM

9. Cut Issue: Trigger Type rate/cycle rate/sec Raw Asymmetry Corrected Asymmetry Polarization Left arm 5202.3 153550.0+/-8628.2 -0.02992+/-0.03970 -0.02990+/-0.00012 -0.45927+/-0.00177 Right arm 3486.9 102918.7+/-6002.6 -0.03307+/-0.04119 -0.03304+/-0.00014 -0.50760+/-0.00216 Coincidence 1976.2 58330.4+/-3484.0 -0.04773+/-0.04213 -0.04770+/-0.00019 -0.73282+/-0.00287 BCM 267.3 7890.7+/-427.0 -0.00004+/-14.46662 0.00014+/-0.00051 0.00000+/-0.00000 Timer 3388.1 100003.9+/-194.7 0.00000+/-0.00000 0.00000+/-0.00000 0.00000+/-0.00000 Moller measurements: rates/sec and asymmetries run Left Right Coinc. Accid. BCM Clock Raw Asymmetry Polarization L-Asymmetry R-Asymmetry BCM 14050 147040 101040 55792 295. 8518. 101155 -0.0477+/- 0.0002 -0.8818+/- 0.0036 -0.0306+/-0.0001 -0.0335+/-0.0001 0.00002

10. Analysis Result Comparison no cut but BCM > 50  Zafar’s result  Run 321 (14048)0.04734/?kHz  Run 322 (14049)0.04758/109.5kHz  Run 323 (14050)0.04751/59.55kHz  Run 324 (14052)0.04711/218.9kHz  Run 325 (14052)0.04743/274.67kHz  My result  Run 321 (14048)0.04741/185.56kHz  Run 322 (14049)0.04755/109.65kHz  Run 323 (14050)0.04760/58.33kHz  Run 324 (14051)0.04715/218.88kHz  Run 325 (14052)0.04744/275.19kHz

11. Coincidence Counting Rate Flash ADC based DAQ v.s. old DAQ

12. Dead-Time Measurement

13. Asymmetry Measurement

14. 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.