BCAL Hybrid Module Cosmic Tests

From GlueXWiki
Jump to: navigation, search

Cosmic Images

DSC00750.JPG
DSC00753.JPG
P1000967.jpg
P1000962.jpg
P1000961.jpg
P1000965.jpg
P1000966.jpg


Trigger Arrangement

TrigArrangement.gif


Plateaus

NBPlateau.gif
NTPlateau.gif
SBPlateau.gif
STPlateau.gif
CherenkovPlateau.gif


Gain Matching

AdcvsVolts.gif


The following plot shows the ratio of mean ADC channels (away from the pedestal) for the BCAL PMTs set at different high voltages. The x-axis can be read as: 1=NB; 2=NT; 3=SB; 4=ST. The flat lines are the expected ratios based on the typical responsivity curve as given in the specs sheet for Burle 8575 PMTs. From that curve, at 2500V gain = 1.5x10^{6}, at 2300V gain = 7x10^{5}, and at 2100V gain = 2.7x10^{5}.

RatioPlot.gif