[Sane-analysis] Two cluster cherenkov

[Whitney R. Armstrong]

Hello Everyone,

Following the suggestion of Peter, I quickly analyzed a run for two good 
Cherenkov events that are well separated.

As suspected, the number of event these events is *very* low compared to the 
single electron number.  My quick analysis  can be seen here
http://quarks.temple.edu/~whit/SANE/analysis_main/plots/72949/two_cluster_pair_3.png
which shows the energy distribution of the single track (black), and double 
cluster events (cluster1=red,cluster2=blue)
Here you can see the separation of the double track events
http://quarks.temple.edu/~whit/SANE/analysis_main/plots/72949/two_cluster_pair_2.png
Likely these many of these events come from something like a noisy group of 
blocks.  Also, I have not even correlated with the lucite hodoscope which will 
only reduce their numbers. Note that I have a single track Cherenkov ADC window 
cut in order to remove the background from the front tracker.

These results are  consistent with my statement that this type of event is 
heavily suppressed by kinematics and acceptance.

Cheers,
Whitney Armstrong