BRUTE FORCE Moller Target
- 30 March 2010
16:15 - 1:30. O.Glamazdin, R. Pomatsalyuk, Jixie Zhang, Zafar Ahmed, Chun-Min Jen
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -59o. Raster was OFF.
Moller magnet alignment test.
Moller magnet alignment test results are given here .
For additional information see halog entry 314779 .
The Moller Log Book scan is given here .
- 31 March 2010
15:30 - 20:30. O.Glamazdin, R. Pomatsalyuk, Jixie Zhang, Zafar Ahmed, Chun-Min Jen
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -59o. Raster was OFF.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
We took the Moller data with both old and new DAQs.
17:05-18:45 Took date with targets 1,3,4 (1,4,12microns) at field=0T to tune aperture detector HV.
19:30 Restore 240Hz helicity frequency settings.
For additional information see halog entry 315148 .
The Moller Log Book scan is given here .
- 3 April 2010
9:30 - 22:30. O.Glamazdin, R. Pomatsalyuk, Jixie Zhang, Zafar Ahmed, Chun-Min Jen
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -59o, the 1/2 wave plate was IN.
Injector Laser attenuation=90, Slit=28 Fast raster was ON Raster size 2.25*4.5 by MCC units (1*1mm2 on the Moller target).
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
Beam charge asymmetry was huge for all runs! Moller BCM cable was connected to high current (low sensitive) output. BCM calibration was wrong
Runs 14235-14237 Moller calorimeter HV and pedestals adjustment.
The theta acceptance is about +/-14o and the mean analyzing power is 0.772.
The error is statistical only. Factor is 16.119Runs Target Encoder/VMI Field B.cur.,uA Polarization % with Levchuk Chi2 Comments 14238-14249 1 1.726/48.0 3.0 3.0 -84.75+/-0.22 -84.29 1.6 Levchuk -0.54% 14250-14255 2 2.007/57.0 3.0 3.0 -85.16+/-0.20 -84.70 0.4 Levchuk -0.54% 14256-14261 4 2.547/75.0 3.0 0.5 -85.85+/-0.25 -85.39 1.1 Levchuk -0.54% 14262-14269 3 2.278/66.0 3.0 1.5 -85.51+/-0.17 -85.05 1.4 Levchuk -0.54% 14370-14373 3 2.278/66.0 3.5 1.5 -85.34+/-0.19 -84.62 1.0 Levchuk -0.48% 14374-14377 3 2.278/66.0 2.8 1.5 -85.12+/-0.18 -84.76 0.3 Levchuk -0.42% 14378-14381 3 2.278/66.0 2.0 1.5 -78.50+/-0.18 -78.23 0.3 Levchuk -0.35% Average 1-4 - - 3.0 -85.31+/-0.10 -84.85 4.3 Levchuk -0.54% The table with detailed information is given here .
For additional information see halog entry 316004 .
The Moller Log Book scan is given here .
The plots with the beam polarization measurements for different Moller targets are given on plot.ps and plot.png .
The plots with the Moller target saturation results are given on plot.ps and plot.png .The summary result (Runs 14238-14269):
Pz=-84.85 +/- 0.10(stat)
- 5 April 2010
12:30 - 22:30. E.Chudakov, O.Glamazdin, R. Pomatsalyuk, Jixie Zhang, Zafar Ahmed, Chun-Min Jen
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o, the 1/2 wave plate was IN.
Injector Laser attenuation=142, Slit=16.62 Fast raster was ON Raster size 2.25*4.5 by MCC units (1*1mm2 on the Moller target).
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
Runs 14293, 14295, 14296 - BCM calibration. see halog entry 316529 .
SPIN DANCE
The theta acceptance is about +/-14o and the mean analyzing power is 0.772.
The error is statistical only. Factor is 16.119Runs Target B.cur Encoder/VMI Field Wien Filter Polarization % with Levchuk Chi2 Comments 14282-14285 3 1.5 2.278/66.0 3.0 -59o -87.80+/-0.20 -87.32 0.2 Levchuk -0.54% 14287-14290 3 1.5 2.278/66.0 3.0 -90o -73.32+/-0.19 -72.93 0.4 Levchuk -0.54% 14291-14298 3 1.5 2.278/66.0 3.0 -30o -81.15+/-0.17 -80.71 0.8 Levchuk -0.54% 14299-14303 3 1.5 2.278/66.0 3.0 +40o 1.18+/-0.19 1.17 2.8 Levchuk -0.54% 14304-14307 3 1.5 2.278/66.0 3.0 -52o -87.71+/-0.20 -87.24 0.3 Levchuk -0.54% The table with detailed information is given here and here .
For additional information see halog entry 316534 .
The Moller Log Book scan is given here .
The plot is given here .
The spin dance fit is given here .
For Mott measurement results see elog entry 1517225 .
That measurement was done for spin not set to 90o into the Mott detector. The horizontal Wien was set to 59o.
The beam polarization=-71.47/cos31o=83.38%. From the second measurement with the spin oriented vertical the beam polarization=35.11/0.4=87.88%. - 17 April 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The half wave plate was OUT.
Old DAQ calorimeter threshold was 300mV.
New SC magnet alignment was done. Runs 14317, 14319, 14321, 134323, 14324, 14325, 14328, 14330, 14332, 14334, 14336, 14338 - Right arm trigger
For the rest of runs the trigger is Left arm.
Runs 14339-14347 - wrong target position (come to the targets from target 4 but not from parking limit)The theta acceptance is about +/-14o and the mean analyzing power is 0.773.
The error is statistical only. Levchuk=-0.55%(rel.) Saturation=+1.04%(abs)
Factor=16.098 and givens here .Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk+Satur Chi2 Comments 14316-14321 1 1.722/48.0 +3.0 3.0 87.67+/-0.28 88.23 0.9 - 14322-14323 2 2.002/57.0 +3.0 3.0 88.15+/-0.47 88.71 2.7 - 14324-14326 2 2.002/57.0 +3.0 3.0 - - - Aperture HV test 14327-14330 2 2.002/57.0 +3.0 3.0 88.40+/-0.33 88.95 0.2 - Average 2 2 2.002/57.0 +3.0 3.0 88.32+/-0.27 88.87 0.9 - 14331-14334 3 2.281/66.0 +3.0 1.5 89.04+/-0.27 89.59 3.3 - 14335-14338 4 2.549/75.0 +3.0 0.3 89.17+/-0.31 89.72 1.0 - 14339-14441 3 2.312/66.0 +3.0 1.3 - - - Wrong target position 14342-14347 2 2.037/57.0 +3.0 1.0 - - - Wrong target position Average 1-4 - 3.0 - 88.53+/-0.14 89.08 6.0 -
The table with detailed information is given here .
The scanned run table for April 17, 2010 from the Moller Log Book is here .
The rates and signal widths were studied for run 14333 (see the plot ). The top pictures show the rates measured for one helicity, 2 helicity gates added (one helicity sequence, or "train"). The BCM rate per helicity gate had an average of 920 and an RMS of 5. The detector rates were divided by the BCM rate for the same window and multiplied by the BCM average of 920. The resulting widths match the Poisson statistics. The width of the asymmetries (2 bottom plots) measured in one helicity "train" (2 pairs) match the widths of the signals in the top plots.
The plot with target results is shown here .The final result:
Pz=89.08 +/- 0.14(stat)
The plot with raw data is given here . - 22 April 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The half wave plate was OUT.
Runs 14357-14359: 240Hz helicity frequency, 0T magnetic field
Run 14360: 30Hz, 0T
Runs 14361-14371: target position dependence test
Runs 14372-14381: Calorimeter threshold study.
Runs 14381-14395: Q1 and Q3 scan
Runs 14399-14401: target 3 shifted position
Runs 14414-14415: hodoscope test
Runs 14416-14417: 240Hz helicity test
The theta acceptance is about +/-14o and the mean analyzing power is 0.770.
The error is statistical only. Levchuk=-0.827%(rel.) Saturation=+1.04%(abs)
Factors are given here .Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk+Satur Chi2 Comments 14395-14398 3 2.276/66.0 +3.0 1.0 91.03+/-0.31 91.32 0.6 - 14402-14405 4 2.555/75.0 +3.0 0.3 91.16+/-0.31 91.45 1.2 - 14406-14409 1 1.720/48.0 +3.0 3.0 90.08+/-0.28 90.37 0.4 - 14410-14412 2 2.002/57.0 +3.0 3.0 90.09+/-0.32 90.38 0.5 - Average 1-4 - 3.0 - 90.58+/-0.14 90.88 3.7 -
The scanned run table for April 22, 2010 from the Moller Log Book is here .
Detailed run-by-run description od measurements is done here .
The table with detailed information is given here .
The table with old DAQ vs FADC run numbers is given here .
The plot with target results is shown here .The final result:
Pz=90.88 +/- 0.14(stat)
The plot with raw data is given here .
The table with comparison of beam asymmetry for old Moller DAQ from Calorimeter+Aperture and Calorimeter is given here .
Beam asymmetry for different Moller targets measured with Calorimeter+Aperture geometry is shown here .
Beam asymmetry for different Moller targets measured with Calorimeter only is shown here .
Comparison of the beam asymmetry for different Moller targets measured Calorimeter only and Calorimeter+Aperture is shown here .
Comparison of Moller results for different days is shown on the plots: plot1(png) , plot1(ps) , plot2(png) and plot2(ps) .
The Moller quads scan result in comparison with GEANT simulation is shown on the plots: quad1(png) , quad1(ps) , quad3(png) and quad3(ps) .
Old DAQ "golden runs" 14395 and 14396 information is given here .
Plots for the "golden runs" are: 14395.ps , 14396.ps , 14395.png and 14396.png .
- 28 April 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The half wave plate was OUT.
Old DAQ calorimeter threshold was 280mV.
Magnet settings: Q1=13352GL, Q2=0, Q3=3336GL, Dipole=303701BdL
EXPERT mode has been tested. Runs 14223-14431.
For EXPERT mode runs helicity frequency was 60Hz. MCC can't set the beam current more than 9microA.
Lower beam polarization for EXPERT mode can be explained by large old DAQ dead time and high level of accidentals.
Run 14433 - Hall A laser OFF. Bleed-through measurement. No bleed-through was found.
After run 14448 magnetic field in Moller magnet has been changed to -3T.
Runs 14453-14459 : dipole collimator test.
!!! April 28 vs April 22: the half wave plate position is the same (OUT) but the beam polarization sign is opposite due to Wien Solenoid changes. !!!The theta acceptance is about +/-14o and the mean analyzing power is 0.772.
The error is statistical only. Levchuk=-0.827%(rel.) Saturation=+1.04%(abs)
Factors=16.161 and given here .Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk+Satur Chi2 Comments 14418-14421 1 1.726/48.0 +3.0 3.0 -88.98+/-0.30 -89.28 0.7 - 14422 1 1.726/48.0 +3.0 3.0 -85.85+/-0.61 -86.18 - Raster OFF 14423 1 1.726/48.0 +3.0 3.0 -88.53+/-1.20 -88.84 - EXPERT mode 14424-14429 1 1.726/48.0 +3.0 9.0 -88.10+/-0.30 -88.41 1.2 EXPERT mode 14430 1 1.726/48.0 +3.0 9.0 -86.01+/-0.75 -86.34 1.0 EXPERT mode raster OFF 14431-14432 1 1.726/48.0 +3.0 3.0 -88.40+/-0.44 -88.71 - - 14433 1 1.726/48.0 +3.0 0.0 0+/-0 - - HallA laser OFF 14434-14437 2 2.002/57.0 +3.0 3.0 -88.52+/-0.30 -88.82 2.4 - 14438 2 2.002/57.0 +3.0 3.0 -88.41+/-0.61 -88.72 0.3 Raster OFF 14439-14440 3 2.281/66.0 +3.0 1.2 -89.79+/-0.36 -90.09 - Raster ON 14441-14442 3 2.281/66.0 +3.0 1.2 -89.51+/-0.34 -89.81 - Raster OFF 14443-14444 4 2.549/75.0 +3.0 0.3 -90.43+/-0.38 -90.72 - Raster OFF 14445-14446 4 2.549/75.0 +3.0 0.3 -90.47+/-0.38 -90.76 - Raster ON 14447-14448 3 2.281/66.0 +3.0 1.3 -89.92+/-0.33 -90.22 - Raster ON 14449-14452 3 2.281/66.0 -3.0 1.5 89.57+/-0.22 89.87 - -3T 14453 3 2.281/66.0 -3.0 1.5 90.85+/-0.48 91.14 - 4cm dipole collimator 14454 3 2.281/66.0 -3.0 1.5 90.95+/-0.64 91.24 - from 4cm to 2cm 14455 3 2.281/66.0 -3.0 1.5 90.83+/-1.01 91.19 - 2cm 14456 3 2.281/66.0 -3.0 1.5 92.70+/-1.36 92.97 - from 2cm to 1cm 14457 3 2.281/66.0 -3.0 1.5 89.78+/-2.43 90.08 - 1cm 14458 3 2.281/66.0 -3.0 1.5 89.74+/-0.87 90.04 - from 1cm to 3cm 14459 3 2.281/66.0 -3.0 1.5 90.58+/-0.70 90.87 - 3cm Average 1 - 3.0 - -88.80+/-0.25 -89.10 - - Average 2 - 3.0 - -88.50+/-0.27 -88.81 - - Average 3 - 3.0 - -89.44+/-0.20 -89.74 - - Average 4 - 3.0 - -90.45+/-0.27 -90.74 - - Average 1-4 - 3.0 - -89.30+/-0.12 -89.60 10.5 -
The scanned run table for April 28, 2010 from the Moller Log Book is here .
For additional information see halog entry 320052 .
The table with detailed information is given here .
The Moller dipole collimator scan result is shown on plot.ps , plot.png
Comparison of CW beam and EXPERT mode is given on plot.ps , plot.png .
The beam polarization with magnetic field +3T vs -3T: -89.74+/-0.20 vs 89.87+/-0.22
The plot with target results is shown here .The final result:
Pz=-89.60 +/- 0.12(stat)
- 05 May 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The half wave plate was OUT.
Old DAQ calorimeter threshold was 280mV.
Magnet settings: Q1=13081GL, Q2=0, Q3=3336GL, Dipole=303701BdL
Moller SC magnet field was 3T. The magnet was in persistent mode.
Beam was strait (not through the Compton chicane).
10:00 Controlled access to reboot IOCHLA and to refill the Moller magnet.
13:35 Controlled access to plug in left aperture detector in old DAQ trigger.
14485-14494 - Left arm aperture counter was unplugged.
Runs 14502-14507: EXPERT mode
Run 14512: 2.5uA
After run 14503 Energy lock was turned ON.
Runs 14513-14515: helicity 120Hz, delay=40.
Beam energy lock was OFF before run 14504.
Moller measurement was ended due to the South Linac HV crush.
The theta acceptance is about +/-14o and the mean analyzing power is 0.768.
Collimator - the Moller dipole collimator size (mm)
The error is statistical only. Levchuk=-1.817%(rel.) Saturation=+1.04%(abs)
Factors=16.203 and given here .Runs Target Encoder/VMI Field B.cur,uA Polarization,% Levchuk+Satur Chi2 Collimator Comments 14497-14501 1 1.724/48.0 +3.0 7.5 -90.81+/-0.52 -90.21 0.9 30 CW 14504-14507 1 1.724/48.0 +3.0 7.5 -89.80+/-0.28 -89.21 1.1 30 EXPERT mode 14508-14511 1 1.724/48.0 +3.0 2.5 -90.01+/-0.28 -89.42 2.4 35 CW 14512 1 1.724/48.0 +3.0 2.5 -89.67+/-0.66 -89.08 - 35 Raster OFF 14516-14518 3 2.280/66.0 +3.0 1.3 -91.23+/-0.46 -90.61 1.1 15 - 14519-14520 3 2.280/66.0 +3.0 1.3 -91.40+/-0.52 -90.78 0.4 15 Raster OFF 14521-14523 3 2.280/66.0 +3.0 1.3 -90.51+/-0.23 -89.91 0.9 35 - 14524-14526 4 2.554/75.0 +3.0 0.6 -91.76+/-0.38 -91.13 1.3 15 - 14527-14529 4 2.554/75.0 +3.0 0.4 -92.47+/-0.26 -91.83 0.3 30 - Average 1-4 - 3.0 - -91.00+/-0.15 -90.39 24 - -
The scanned run table for May 05, 2010 from the Moller Log Book is here .
There is a problem with old DAQ at the beginning(the left aperture channel was connected to the right aperture scintillators) and there are runs that marked as "junk", but corresponded runs for FADC DAQ are good for analyze.
For additional information see halog entry 321102 .
The table with detailed information is given here .
The plot with target results is shown here .The final result:
Pz=-90.39 +/- 0.15(stat)
- 08 May 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The raster strip on an oscilloscope in the counting room was vertical instead of horizontal for any another measurement.
The half wave plate was OUT.
Beam was strait (not through the Compton chicane).
Old DAQ calorimeter threshold was 280mV.
Magnet settings: Q1=13081GL, Q2=0, Q3=3336GL, Dipole=303701BdL
Injector Spin flipper parameters has been changed from the last Moller measurement.
15:00 Controlled access to refill the Moller magnet.
The Moller quad MQM1H02(Q1) cycling took 30-40min (elog 1523155).
Runs 14530-14538: Q1 scan with the Moller magnet field=0T.
Runs 14539-14540: Ramping the Moller magnet up to 3Tl. Tune beam.
Runs 14541-14544: Q1 scan with the Moller magnet field=3T.
Quad scan information is presented here .
Quad scan result is shown on the plot .
Run 14542 - mix of tune beam and CW beam.The theta acceptance is about +/-14o and the mean analyzing power is 0.767.
The error is statistical only. Levchuk=-1.817%(rel.) Saturation=+1.04%(abs)
Factors=16.203 and given here .Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk+Satur Chi2 Comments 14544-14545 1 1.726/48.0 +3.0 2.3 90.21+/-0.44 89.61 3.9 - 14546-14547 1 1.761/48.89 +3.0 2.3 90.71+/-0.45 90.10 0.8 target shifted 14548-14549 2 2.005/57.0 +3.0 2.6 90.25+/-0.42 89.65 1.5 - 14550-14551 2 2.032/58.0 +3.0 2.6 89.23+/-0.45 88.65 0.4 target shifted 14552-14553 3 2.278/66.0 +3.0 1.6 91.36+/-0.33 90.74 0.1 - 14554 3 2.308/67.0 +3.0 1.4 89.52+/-0.58 88.93 - "edge"-effect 14555-14556 3 2.291/66.0 +3.0 1.4 91.02+/-0.40 90.40 0.1 target shifted 14557-14558 4 2.552/75.0 +3.0 0.35 91.62+/-0.41 91.00 0.7 - 14559-14560 4 2.564/75.5 +3.0 0.35 92.30+/-0.43 91.66 0.5 target shifted Average 1 - 3.0 - 90.46+/-0.32 89.85 1.8 - Average 2 - 3.0 - 89.78+/-0.31 89.18 1.1 - Average 3 - 3.0 - 91.22+/-0.26 90.60 0.4 - Average 4 - 3.0 - 91.95+/-0.30 91.32 0.7 - Average 1-4 - 3.0 - 90.89+/-0.15 90.29 9.3 -
The scanned run table for May 08, 2010 from the Moller Log Book is here .
For additional information see halog entry 321780 .
The table with detailed information is given here .
The plot with target results is shown here .The final result:
Pz=90.29 +/- 0.15(stat)
- 15-16 May 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target. The raster strip on an oscilloscope in the counting room was vertical instead of horizontal for any another measurement.
The half wave plate was OUT.
Beam was through the Compton chicane.
Magnet settings: Q1=13081GL, Q2=0, Q3=3357GL, Dipole=303701BdL
The theta acceptance is about +/-14o and the mean analyzing power is 0.768.
The error is statistical only. Factors=16.203 and given here .Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk Chi2 Comments 14561-14564 2 2.000/57.0 +2.0 2.4 -80.82+/-0.28 -80.19 0.3 Levchuk=-0.784%(rel) 14565 3 2.278/66.0 +2.0 2.4 -81.56+/-0.31 -80.92 - - 14566-14568 3 2.278/66.0 +2.0 1.1 -82.21+/-0.32 -81.57 0.7 - 14569-14572 3 2.278/66.0 +2.5 1.1 -88.93+/-0.28 -87.77 0.1 Levchuk=-1.31%(rel) 14573 3 2.278/66.0 +2.5 2.5 -88.79+/-0.38 -87.63 - - 14574-14577 2 2.002/57.0 +2.5 2.4 -89.01+/-0.29 -87.84 0.1 - 14578-14581 2 2.002/57.0 +2.8 2.4 -89.17+/-0.30 -87.83 1.0 Levchuk=-1.50%(rel) 14582 3 2.278/66.0 +2.8 2.1 -90.11+/-0.43 -88.76 - - 14583-14586 3 2.278/66.0 +2.8 1.1 -90.42+/-0.29 -89.06 0.2 - 14587-14590 3 2.278/66.0 +3.0 1.1 -90.68+/-0.31 -89.03 0.7 Levchuk=-1.82%(rel) 14591 3 2.278/66.0 +3.0 2.4 -90.27+/-0.41 -88.63 - - 14592-14595 2 2.005/57.0 +3.0 2.7 -90.38+/-0.30 -88.74 0.6 - 14596-14599 2 2.005/57.0 +3.4 2.7 -90.03+/-0.31 -88.11 1.6 Levchuk=-2.13%(rel) 14600 3 2.281/66.0 +3.4 2.1 -90.60+/-0.48 -88.67 - - 14601-14604 3 2.281/66.0 +3.4 1.1 -92.12+/-0.31 -90.16 2.2 - 14606-14608 3 2.281/66.0 +3.8 1.1 -92.70+/-0.37 -90.14 0.1 Levchuk=-2.76%(rel) 14609 3 2.281/66.0 +3.8 2.7 -92.82+/-0.44 -90.26 - - 14610-14613 2 2.005/57.0 +3.8 2.7 -92.12+/-0.32 -89.58 2.3 - 14614 4 2.549/75.0 +3.8 2.4 -90.23+/-0.32 -87.74 - - 14615-14616 4 2.549/75.0 +3.8 0.6 -92.90+/-0.44 -90.34 0.7 - 14617-14620 4 2.549/75.0 +3.8 0.35 -92.34+/-0.31 -89.79 1.9 - Average 2-4 - +3.8 - -92.49+/-0.16 -89.94 0.8 -
The scanned run table for May 15-16, 2010 from the Moller Log Book is here .
For additional information see halog entry 322808 .
The table with detailed information is given here .
The plot with raw data is given on plot.ps and plot.png .
Target saturation plot is given on plot.png
The final result:
Pz=-89.94 +/- 0.16(stat)
- 06 June 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
Beam was passing through the Compton chicane.
The beam large charge asymmetry test was done (runs 14649-14651).
Measured asymmetry is: -0.000753+/-0.000177.
The plot with the test results is given on bcm0606.png and bcm0606.ps
Halog entry 325293 . - 07 June 2010
The beam energy is 1063.12MeV(accel), 503.25MeV(linac), 56.627MeV(injector).
Injector angle is -52o.
Helicity frequency: 30Hz, pattern: quartet, delay: 8 windows.
The raster was ON 2.25*4.5MCC units or 1*1mm on the Moller target.
The half wave plate was IN.
Beam was passing through the Compton chicane.
Old DAQ calorimeter threshold was 280mV.
Magnet settings: Q1=13081GL, Q2=0, Q3=3336GL, Dipole=303701BdL
Moller quads power supply was turned OFF (see elog 1527589).
12:30 Controlled access to turn on Moller quads and fill the Moller magnet.
Runs 14670-14673: the beam large charge asymmetry test.
The theta acceptance is about +/-14o and the mean analyzing power is 0.768.
The error is statistical only. Factors=16.203 and given here
For 3T: Levchuk=-1.817%(rel.) Saturation=+1.04%(abs)
For 3.5T: Levchuk=-2.2%(rel.) Saturation=+0.4%(abs)
.Runs Target Encoder/VMI Field B.cur.,uA Polarization % Levchuk+Satur Chi2 Comments 14653-14654 2 2.005/57.0 +3.0 3.1 -90.09+/-0.43 -90.30 0.7 - 14655-14656 2 2.005/57.0 +3.5 3.1 -90.74+/-0.43 -89.14 0.8 - 14657-14658 2 2.005/57.0 +3.0 3.1 -89.88+/-0.39 -89.29 0.7 - Average 2 - - 3.1 -90.21+/-0.24 -89.56 1.2 - 14659-14660 3 2.281/66.0 +3.0 2.4 -91.44+/-0.34 -89.54 2.3 - 14661-14662 3 2.281/66.0 +3.0 1.2 -92.22+/-0.37 -91.58 0.1 - 14663-14664 3 2.281/66.0 +3.5 1.2 -92.52+/-0.41 -90.89 0.1 - 14665-14666 3 2.281/66.0 +3.0 1.2 -91.38+/-0.36 -90.76 0.2 - Average 3 - - 1.2 -91.83+/-0.18 -90.63 2.3 - 14667-14670 4 2.549/75.0 +3.0 0.5 -91.64+/-0.21 -91.01 0.6 - Average 2-4 - - - -91.37+/-0.12 -90.49 11 -
The scanned run table for June 07, 2010 from the Moller Log Book is here .
For additional information see halog entry 325133 .
The table with detailed information is given here .
The plot with all raw data is given on plot.ps and plot.png .
The beam large charge asymmetry test was done (runs 14670-14673).
Measured asymmetry is: +0.001312+/-0.000257.
The plot with the test results is given on bcm0607.png . Halog entry 325293 .
The plot with target results is shown here .The preliminary result:
Pz=-90.49 +/- 0.12(stat)
E07-007 and E08-025: DVCS
Deeply Virtual Compton Scattering in Hall A - 30 September 2010 20:30 - 23:50 O.Glamazdin, Jixie Zhang
Moller SC magnet alignment test.
Moller magnet alignment test results are given here .
The Moller Log Book scan is given here .
For additional information see halog entry 333273 .
- 02 October 2010 14:30 - 23:00 Jixie Zhang, Zafar Ahmed, R. Pomatsalyuk, O. Glamazdin
The beam energy is 5562.5eV(accel), 549.0MeV(linac), 61.76MeV(injector).
Injector angle is 29.2o.
Helicity frequency: 120Hz, pattern: quartet, delay: 8 windows.
The raster was ON 3*3MCC units or 0.9*1mm on the Moller target.
The half wave plate was OUT.
Beam was straight.
Old DAQ calorimeter threshold was 280mV.
Runs 14737-14749: detector HV tunning.
Runs 14750-14754: detector pedestals ajustment.
Runs 14755-14768: the 1st Moller quad scan.
Runs 14769-14775: the 3rd Moller quad scan.
Runs 14777-14782: calorimeter threshould tunning.
The Moller Log Book scan is given here .
For additional information see halog entry 333405 .
The table with detailed information is given here .
- 03 October 2010 16:00 - 22:45 Jixie Zhang, R. Pomatsalyuk, O. Glamazdin
The beam energy is 5562.5eV(accel), 549.0MeV(linac), 61.76MeV(injector).
Injector angle is 29.2o.
Helicity frequency: 120Hz, pattern: quartet, delay: 8 windows.
The raster was ON 3*3MCC units or 0.9*1mm on the Moller target.
The half wave plate was OUT.
Beam was straight.
Old DAQ calorimeter threshold was 250mV.
Hall C was OFF. ARC1 energy lock was used. Beam energy fluctuation Chart is given on plot .
Runs 14783-14787: detector delays tunning (aperture).
Run 14787: Aperture Left234 and Right234 HV OFF.
Runs 14788-14809 - The beam polarization measurement with using of four different Moller targets.
Runs 14806-14830 - Target 4(10um) saturation test.
22:15 Reboot the Moller SC magnet. Magnet quench chart .
The theta acceptance is about +/-16o and the mean analysing power is 0.755.
The error is statistical only. Levchuk - Polarization corrected on Levchuk-effect
HALLA:p - Polarization corrected on the beam energy fluctuation (HALLA:p)Runs Target Encoder BOP B.cur. Polarization, % Levchuk,% HALLA:p,% Comments 14788-14795 1 1.712/48.0 3.75T 3.1 58.25+/-0.25 57.65 62.06 Levchuk=1.03%(rel) 14796-14799 2 1.985/57.0 3.75T 3.1 58.74+/-0.18 58.14 62.26 Levchuk=1.03%(rel) 14800-14805 3 2.259/66.0 3.75T 3.1 57.56+/-0.16 57.13 61.38 Levchuk=1.03%(rel) 14806-14809 4 2.530/75.0 3.75T 1.3 58.77+/-0.18 58.05 62.15 Levchuk=1.03%(rel) 14810-14813 4 2.530/75.0 3.5T 1.3 59.67+/-0.19 59.07 62.39 Levchuk=1.01%(rel) 14814-14818 4 2.530/75.0 3.25T 1.3 58.34+/-0.17 57.77 61.80 Levchuk=1.00%(rel) 14819-14822 4 2.530/75.0 3.0T 1.3 58.01+/-0.19 57.43 61.53 Levchuk=1.00%(rel) 14823-14826 4 2.530/75.0 2.75T 1.3 56.96+/-0.19 56.38 60.55 Levchuk=1.02%(rel) 14827-14830 4 2.530/75.0 2.0T 1.3 47.22+/-0.18 46.73 50.38 Levchuk=1.04%(rel) Average 1-4 - 3.75T - 58.33+/-0.09 57.71 61.90 14788-14809 The Moller Log Book scan is given here .
For additional information see halog entry 333535 .
The table with detailed information is given here and here
The final result:
Pz=61.90 +/- 0.09(stat)
The plot with raw polarization data is given on the plot .
The plot with final result is given on the plot .
The plot with target saturatin test is given on the plot .
Summary of the Moller commisssionning for 30 September - 3 October is given here .
DVCS accelerator information: beam energy=5551.76MeV, injector=62.26MeV, North linac=547.96MeV, South linac=549.25MeV,
disbalance A=(E1-E2)/(E1+E2)=0.0011757. Detailed information is in elogs 1546669 and 1546673 .
Hall A Arc Energy Measurement= 5548.91 MeV +/- 1.1 MeV (see halog 335014
- 15 October 2010 15:00 - 22:50 Jixie Zhang, R. Pomatsalyuk, O. Glamazdin, Ahmed Zafar
The beam energy is 5551.7eV(accel), 549.0MeV(linac), 61.76MeV(injector).
Injector angle is 29.2o.
Helicity frequency: 943.4Hz, pattern: quartet, delay: 8 windows.
The raster was ON 4.1*3MCC units or 1*1mm on the Moller target.
The half wave plate was OUT.
Beam was straight.
Old DAQ calorimeter threshold was 250mV.
HallA energy lock was used. Beam energy was stable.
20:20 The Moller SC magnet quench when we chenged mode from 'persistent' to 'standby'.
Runs 14878-14881: Magnet was ramped from 0T up to 3.0T.
Runs 14882-14885: Magnet was ramped from 3.0T up to 3.9T and ramper down to 3.0T.
The theta acceptance is about +/-15o and the mean analysing power is 0.760.
The error is statistical only.
Pol.Cor. - polarization corrected on Levchuk-effect=-1.04%(rel)Runs Target Encoder BOP B.cur. Polarization % Pol.Cor. Chi2 Comments 14845-14851 1 1.712/48.0 3.9T 3.0 77.56+/-0.27 76.75 1.1 - 14852-14855 2 1.985/57.0 3.9T 3.0 77.30+/-0.20 76.50 1.5 - 14856-14859 3 2.261/66.0 3.9T 3.0 77.65+/-0.25 76.84 0.3 - 14860-14863 4 2.527/75.0 3.9T 1.4 77.64+/-0.21 76.83 1.2 - 14864-14865 2 1.983/57.0 3.9T 2.8 78.08+/-0.31 77.27 1.6 - Average 2 2 1.983/57.0 3.9T 2.8 77.54+/-0.17 76.73 1.8 - 14866-14869 2 1.983/57.0 3.75T 3.0 77.67+/-0.21 76.86 1.1 - 14870-14873 2 1.983/57.0 3.5T 2.9 78.00+/-0.19 77.19 0.9 - 14874-14877 2 1.983/57.0 3.25T 3.0 77.46+/-0.20 76.65 0.8 - 14878-14881 2 1.983/57.0 3.0T 3.0 77.09+/-0.21 76.29 0.2 after quench 14882-14885 2 1.983/57.0 3.0T 2.9 77.16+/-0.21 76.36 0.6 after 3.9T Average 3T 2 1.983/57.0 3.0T 2.9 77.13+/-0.15 76.33 0.4 14878-14885 14886-14889 2 1.983/57.0 2.75T 2.9 76.81+/-0.20 76.01 1.7 - Average 1-4 - 3.9T - 77.59+/-0.10 76.78 0.1 14845-14863 The Moller Log Book scan is given here .
For additional information see halog entry 335034 .
The table with detailed information is given here and here .
The plot with target saturation is given here .
The final result:
Pz=76.78 +/- 0.10(stat)
The polarization data is given on the plot .
15-Oct-10 16:36 Vacuum problem on PGUN. Detailed information is in plog 1547337
18-Oct-10 PGUN photocathode cleaning and activation: 1547900 .
- 27 October 2010 8:30 - 15:30 J. Zhang, R. Pomatsalyuk, O. Glamazdin
The beam energy is 4455.7MeV(accel), 549.39MeV(linac), 61.76MeV(injector).
Injector angle is 29.2o.
Helicity frequency: 943.4Hz, pattern: quartet, delay: 8 windows.
The raster was ON 4.1*3MCC units or 1*1mm on the Moller target.
The half wave plate was IN.
Beam was through the Compton chicane.
Moller energy lock was used. Beam energy was stable. Strip chart is given on plot .
Problems with the Moller solenoid power supply (see halog entry 336986 .
13:55 After changing Moller target from target 3 to target 4 and the beam current from 3uA to 1.3uA we lost information about the beam position on BPM 1H01 (see strip chart ).
It was found that the beam polarization sign on October 27th (HWP=IN) is the same as for the Moller measurements on October 15th (HWP=OUT) (see halog entry 337147 )
The theta acceptance is about +/-16o and the mean analysing power is 0.756.
The error is statistical only.
Levchuk - Polarization corrected on Levchuk-effect: -0.87% (3.0T), -0.76%(3.9T)
Cor.Pol - Polarization corrected on the beam energy fluctuation (HALLA:p)Runs Target Encoder BOP B.cur. Polarization % Chi2 Levchuk ,rel% Cor.Polar.% Comments 14899-14907 1 1.712/48.0 3.9T 3.0 72.71+/-0.22 0.7 72.16 73.61 - 14908-14911 2 1.983/57.0 3.9T 3.0 73.04+/-0.17 1.1 72.49 73.94 - 14912-14915 3 2.256/66.0 3.9T 3.0 73.27+/-0.19 0.7 72.71 74.16 - 14916-14919 4 2.527/75.0 3.9T 1.3 72.07+/-0.17 0.7 71.52 72.96 BPM 1H01 problem? 14920-14921 3 2.256/66.0 3.9T 3.0 72.89+/-0.36 0.4 72.34 73.79 - Average 3 3 2.256/66.0 3.9T 3.0 73.18+/-0.17 0.4 72.62 74.07 - 14922-14925 3 2.256/66.0 3.0T 3.0 73.09+/-0.18 1.3 72.45 73.89 - Average 1-3 - 3.9T - 73.02+/-0.11 1.4 72.47 73.91 - The Moller Log Book scan is given here .
For additional information see halog entry 337023 .
The table with detailed information is given here and here .
The plot with raw polarization data is given on the plot.png and the plot.ps .
The final result:
Pz=73.91 +/- 0.11(stat)
The polarization data is given on the plot .
Mott result on October 26th: Polarization: (82.85+/-2.32stat+/-0.49sys)% (see polog 1549478 ).
- 02 November 2010 16:30 - 17:30
O. Glamazdin, R. Pomatsalyuk
Beam charge asymmetry test.
The test was done in parallel with HRS and Compton Runs 14926-14931 - HWP is OUT
Runs 14932-14934 - HWP is IN
Beam current 3microA
Config: test_LED, Trigger LEDsetcoda2
The Moller results are shown on plots hwp_in and hwp_out .
For additional information see halog entry 338200 .
- 23 November 2010
14:50 - 20:10. O.Glamazdin, R. Pomatsalyuk, Jixie ZhangThe beam energy is 3355.8MeV(accel), 549.0MeV(linac), 61.76MeV(injector).
The HWP was OUT.
The raster was ON 4.1*3MCC units or 1*1mm on the Moller target.
Beam was through the Compton chicane.
Helicity frequency: 960Hz, pattern: quartet, delay: 8 windows.
Beam condition was very bad. It looks like with new Moller SC magnet we can operate Moller and Compton together not for all beam energies.
Due to the beam condition only few runs can be used for analysis. A part of information about the runs was lost (see note below).
Both, old DAQ and FADC were used. FADC has more data and it is more trusted for the spin dance.
Levchuk effect was -0.3% for this beam energy and Moller settings. Due to a large statistical error we did not use Levchuk correction.
Runs 14935-14939 - HV tunes
Run 14942 - Hall A laser OFF
Run 14043 - Hall C laser OFF
Run 14966 - Hall A laser OFF. No bleed-through from Hall C was found.
SPIN DANCE
The theta acceptance is about +/-14o and the mean analyzing power is 0.754.
The error is statistical only.Runs Target B.cur Encoder/VMI Field Wien Filter Polarization % Chi2 Comments 14944-14951 2 0.5-1.0 - 3.9 -0.1o -2.17+/-0.62 1.6 - 14952-14958 3 0.5-0.8 - 3.9 +29.0o 46.97+/-0.48 1.0 - 14961-14962 1 0.5 - 3.9 -31.0o 31.83+/-1.51 1.8 - 14964-14966 1 0.5 - 3.9 -75.0o 70.45+/-1.46 2.4 - The Moller Log Book scan is given here .
For additional information see halog entry 341415 .
The table with detailed information is given here.
The plots with dance results are given on plots old DAQ and FADC .
Hall C Moller results on November 23rd see hclog 208285 .
Notes.
The 'adaqfs' disks on adaq computers have been recovered on Nov 25, 2010 after crash.
Unfortunately files for 'adaqfs/home/moller' account have been restored only on date before Nov 23, 2010. We lost settings file in '/home/moller/daq/coda2/Runinfo' for runs 14935-14966 taken on Nov 23, 2010. To make analisis soft links have been crated for these runs in '/home/moller/daq/coda2/Runinfo' directory.
The run number in coda database has been restored also (to 14967).The run number for FADC DAQ has not been restored. There are dublicated runs number: 2411-2436 produced during test FADC DAQ with pulser on Jan 23, 2011. Dublicated data files from Jan 23, 2011 have been moved to
'/data1/ROOTFILES/moller_romanip/pulser_test/' with EPICS settings files.
Data files for runs from Nov 23, 2010 that stored in SILO are good. EPICS settings files for runs taken on Nov 23, 2010 are lost (probably).
