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THE GAMMA RAY DETECTOR
TESTS OF THE PHOSWICH ELECTRONICS
3 other sections not shown
amplifier Anticoincidence Shield assembly Block Diagram capacitor cesium iodide crystal cesium iodide pulse charged particle event charged particle rejection Circuit board collimator common emitter component Compton scattering COSMIC GAMMA RAY count CsI(Tl current is switched current pulse decay delay detected Digital outputs efficiency emission energy gamma rays excitons experiment exponential exponential decay factor fast neutrons Figure 25 fluctuations flux gain gamma event gamma rays gate pulse go"-univibrator high energy inhibit input pulse LeCroy converter light pulse logic gate low energy microsecond nanoseconds nsec operation organic scintillator oscilloscope particle type peak phoswich discriminator phoswich electronics photoelectrons photomultiplier photons PNP transistor preamplifier produce pulse height analyzer pulse height spectrum pulse width distribution radiation RC circuit RC integrator RC time constant resistor second scope self-rejection shown in Figure shows sky viewed TMC analyzer transistor trigger tunnel diode univibrator pulse variation veto pulse volts waveform zero-crossing discriminator