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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.