CDC old preamp then and now
From GlueXWiki
The pictures below show ADC amplitude histograms for tracked and untracked cosmic ray data with 50/50 Ar/CO2 gas mixture (the maximum ADC amplitude for each event contributes one entry for that amplitude in the histogram) and energy spectra obtained by integrating the amplitude histograms.
2050V - cosmics - amplitude, old preamp, 2009 (left) and 2010 (right)
1950V - cosmics - energy, old preamp (left) and new preamp (right) - ADC range is halved for new preamp
Old preamp, n=10
Old preamp (flat), 2050V, software threshold n=10, newer data
2050V - cosmics - amplitude, old preamp, 2009 (left) and 2010 (right)
2050V - cosmics - energy, old preamp (left) and new preamp (right)
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