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Signal-to-Noise:
This is defined as the ratio of the separation of the signal from
the pedestal, to the sigma of the pedestal. The first plot contains 1-strip
clusters, where one strip had a signal greater than 2.5x the pedestal sigma,
as well as 2-strip clusters, where two neighboring strips had signals greater
than 2x the pedestal sigma. In addition, a coincidence with a signal on the
downstream silicon detector was required.
It shows the expected landau distribution of the
deposited charge, as well as the upper edge of the pedestal.
The lower plot was generated using much stricter cuts. Only 1-strip
clusters that had signals greater than 2.5x the pedestal sigma, and whose
neighbors were lower than 1.5 this sigma, and who met the downstream
coincidence requirement were included. This created a cleaner landau
distribution without the pedestal edge.
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