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    User name paschke

    Log entry time 17:36:04 on June19,2004

    Entry number 126341

    keyword=Hall C charge asymmetry corrected with beefed up IA slope

    We got the additional moment we needed from the Hall C IA cell
by rotating the IA waveplate using the S1 picomotor.  

The Hall C IA slope is now approximately 1250 ppm/Volt (I had miscalculated when I said we needed 1400 ppm/V). I set the 
Hall C IA to 1.25 to get rid of the approximately 4800 ppm 
charge asymmetry on the Hall C beam. 

KK had a fantastic idea on how to solve this problem upfront, without the need for a big IA correction (basically, rotate the C-beam 
linear polarization so it doesn't get any helicity information).
I'll persue this idea with the source group.