Moller Measurements Summary for E05-109 HAPPEX-III, August - October 2009

Last updated: Fri, 26 October 2010 moller@jlab.org
Here a summary is given of the Moller measurements done for E05-109 HAPPEX-III running on August 21 - October 25, 2009.

The Moller results are presented in a table below and on plots 1 and 2

The Moller measurements results for HAPPEX-III running time were reanalyzing in summer 2010. New analysis includes more accurate beam polarization calculation by using scalers fit and more detailed systematic error analysis. 

  #    date       Beam Polar.  Stat.err.  Syst.err.  Wien,deg                    
  ---------------------------------------------------------------
  1  08.27.2009    -79.07     +/- 0.11    +/- 1.7%    44.3048
  2  08.28.2009    -79.89     +/- 0.09    +/- 1.7%    44.3048
  3  08.31.2009    -88.65     +/- 0.11    +/- 1.7%    14.20
  4  09.05.2009    -89.69     +/- 0.10    +/- 1.7%    17.20
  5  09.11.2009    +89.86     +/- 0.10    +/- 1.7%    17.20
  6  09.17.2009    -88.73     +/- 0.10    +/- 1.7%    17.20
  7  09.23.2009    -89.41     +/- 0.10    +/- 1.7%    17.20
  8  10.04.2009    -89.45     +/- 0.09    +/- 1.7%    17.20
  9  10.11.2009    +88.92     +/- 0.10    +/- 1.7%    17.20
 10  10.13.2009    -88.79     +/- 0.11    +/- 1.7%    17.20
 11  10.22.2009    -89.49     +/- 0.09    +/- 1.7%    17.20

08.31 - Spin dance. Wien filter angle change.
09.05 - New Wien filter angle.
09.11 - 86.12 +/- 1.28stat +/- 1.03sys (IHWP=OUT).
09.17 - Mott: 84.21 +/- 2.01stat +/- 1.01sys (IHWP=OUT, after beam spot move).
09.23 - Mott: 86.63 +/- 0.93stat +/- 1.04sys (IHWP=IN).
10.04 - Mott: 84.08 +/- 1.01stat +/- 1.01sys (IHWP=IN, after beam spot move).
10.13 - Hall A: 12 October beam spot move was done.
MOTT: IHWP=IN, Mott Data Taken: 16Oct09 08:36:28, Polarization: (86.38 +/- 0.92stat +/- 1.04sys) %
Hall A: IHWP=OUT, Mott Data Taken: 16Oct09 08:43:48, Polarization: (85.62 +/- 0.87stat +/- 1.03sys) %
Mott: (IHWP=IN) 86.38 +/- 0.92stat +/- 1.04sys
10.22 - Measurement was done after power outage (22 October).
10.25 - Hall A laser phase study. No beam polarization measurement was done.

The details of the measurements can be found here .