• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name R. Michaels

    Log entry time 17:20:56 on October 8,2002

    Entry number 87640

    keyword=charge asymmetry test

    Purpose is to measure a "large" charge asymmetry with
    Moller, spectrometer, and parity DAQs for comparisons.
    Beam current 10 uA
    Spectrometer run...........Moller run................HAPPEX run
    1233...............................10359........................1745

    Moller says they had a ~0.1% charge asymmetry (~6 std. dev.)
    After this there were several beam problems. Also it seems to be
    difficult to get >= 1% charge asymmetry "on demand". This is needed
    in order to measure an asymmetry in triggers within a reasonable time.
    However, we can easily extract a small charge asymmetry from each DAQ.
    We will do that with the runs above, and can repeat next time we
    do a Moller. This comes for "free" since the DAQs don't interfere.

    Test ended.