Preamp 4: Comparison of cosmic data with original preamp

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The pictures below show ADC amplitude histograms for 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.


These compare data taken using the old and new preamps - the "old" preamp is the original one and the "new" preamp is Preamp4, described in Table 2 row 2 of GlueX-doc-1364 and labelled 27.


2050V - cosmics - amplitude, old (left) and new (right) preamps

old preamp, cosmics, 50/50 Ar/CO2, 2050V
new preamp, cosmics, 50/50 Ar/CO2, 2050V

2050V - cosmics - energy, old (left) and new (right) preamps

old preamp, cosmics, energy, 50/50 Ar/CO2, 2050V
new preamp, cosmics, energy, 50/50 Ar/CO2, 2050V


2100V - cosmics - amplitude, old (left) and new (right) preamps - the new preamp is saturating at this voltage

old preamp, cosmics, 50/50 Ar/CO2, 2100V
new preamp, cosmics, 50/50 Ar/CO2, 2100V