Projections of the pedestal noise in sum and difference
of two channel on one chip
Rudi Ganz Oct 28th 1997
These are projection for the telescope detector 1 VA chip number
3 out of Runnumber 100 from the 97 testbeam data.
(pedestal events only !) For each event the ADC values of one channel
is combined with all the other channels. These combination are done for
all channels in one VA chip. The projections show the distribution of A)
the sum of both ADC values and B) the difference between two ADC values
(after subtraction of the pedestal value)
Sum( telescope 1 chip3)
(click on image to enlarge)
Difference (telescope 1 chip3)
(Click ..)
The difference in the width tell that there might be common
noise involved but only very small fraction of the total width comes from
it.
