Moller Measurements for E06-010 Transversity, Nov 2008 - Feb 2009

Last updated: Thu, 04 March 2009 moller@jlab.org
Here a summary is given of the Moller measurements done for E06-010 Transversity running in October 2008 - February 2009.

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

  #    date      day*      Moller      Moller with HALLA:p  Syst.err.  
                                   
  --------------------------------------------------------------------- 
  1  11.02.2008   12  +88.09 +/- 0.17    +88.09 +/- 0.17    +/- 1.7%
  2  11.12.2008   22  -74.85 +/- 0.10    -79.47 +/- 0.10    +/- 2.0%    
  3  11.17.2008   27  -74.03 +/- 0.10    -79.63 +/- 0.10    +/- 2.0%
  4  11.20.2008   30  -74.15 +/- 0.13    -76.94 +/- 0.13    +/- 2.0%
  5  11.28.2008   38  +80.26 +/- 0.11    +78.03 +/- 0.11    +/- 2.0%    
  6  12.08.2008   48  -53.81 +/- 0.11    +54.10 +/- 0.11    +/- 2.0%    
  7  12.09.2008   49  -78.65 +/- 0.10    +79.08 +/- 0.10    +/- 2.0%    
  8  12.17.2008   57  -79.59 +/- 0.18    -78.47 +/- 0.16    +/- 2.0%    
  9  01.13.2009   63  -81.12 +/- 0.15    -79.88 +/- 0.16    +/- 2.0%    
 10  01.24.2009   74  -78.55 +/- 0.16    -79.88 +/- 0.16    +/- 2.0%
 11  02.03.2009   85  -75.84 +/- 0.16    -79.14 +/- 0.16    +/- 2.0%
* day - day of experiment running

Measurement 1: (11.02.2008)
There is no energy fluctuation. Beam energy correction was not done.

Measurements 2 - 11
The Moller measurements 2-8 were done at ~0.5uA curent. At this current HALLA:p energy reading is more noisy and for a part of measurements energy correction can not be correctly done at all. This is the reason to increase systematic error from 1.7% to 2.0%.

Measurement 6: (08.12.2008):
From Eugine's words the beam polarization was low due to the injector problem.

Measurement 9: Spin Dance (01.13.2009)
The plot is given here .

The details of the measurements can be found here .