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    User name O.Glamazdin

    Log entry time 23:02:59 on August 31, 2009

    Entry number 287270

    Followups:

    keyword=The Moller spin dance results

    Moller results on August 31 14:50-23:50

    Spin Dance


     #    Wien angle  beam     runs target Ptarget% Pbeam%
    1 44.30° 0.55 µA 13174-13175 5 8.03 -80.28±0.3±2.0
    2 110.27° 0.55 µA 13174-13175 5 8.03 14.11±0.3±2.0
    3 -70.22° 0.55 µA 13174-13175 5 8.03 -5.37±0.3±2.0
    4 14.20° 0.55 µA 13174-13175 5 8.03 -89.61±0.3±2.0
    5 14.20° 0.55 µA 13174-13175 4 7.05 -87.85±0.3±2.0
    6 14.20° 0.36 µA 13180-13181 3 7.56 -88.38±0.2±2.0
    7 14.20° 0.25 µA 13182-13185 2 8.20 -89.06±0.2±2.0
    Aver. 14.20° - 13180-13185 2,3,4,5 - -88.72±0.1±2.0

    Spin Dance Results

    The Wien filter angle 14.2° was choosen as an optimal for the Hall A with the beam energy Eb=3.4839GeV (from M. Tiefenback) and linacs disbalance=7.5%.
    The Wien filter angle 17.° is an optimal for the Hall A with the beam energy Eb=3.4812GeV and linacs disbalance=7.5%.
    The beam polarization difference between 14.2° and 17° is 0.998682.
    The Hall A Moller results are presented in the chart attached.


    A copy of this log entry has been emailed to: gen@jlab.org, saha@jlab.org



    Figure 1. Spin dance result



    Figure 2. Beam polarization at 14.2deg Wien filter