Log entry time 13:58:15 on March 30, 2012

Entry number 368388

Now that Hall C is back up to high current I did a bleed-through 
measurement.  Note that the RHRS was at the elastic setting for this 
measurement, the LHRS was at the 1.792 GeV setting

T3 rates (you get the same answer using the T1 rates):

Rate_Cosmic (fig1): ~14 Hz (this was taken with the slit closed)
Rate_C+Cosmic (fig2): ~477 Hz (slit at 14, hall A laser off, hall c on)
Rate_A+C+Cosmic (fig3): ~94 kHz

This gives a bleed-through of 0.5%.  I'm not sure what is "too big", but I 
definitely remember in the past seeing a negligible difference between 
cosmic and cosmic+hallc.

Cosmic

Hall C + Cosmic

Hall A + Hall C + Cosmic