Lecture24 - ENU 4612C/5615C Nuclear Radiation Detection and...

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ENU 4612C/5615C Nuclear Radiation Detection and Instrumentation Lecture 24 Semiconductor Detectors (3)
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Leakage Current Leakage Surface region depletion in carriers generated Thermally current carrier Minority : Bulk
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Detector Noise Sources Trapping noise contact Electric ns fluctuatio current leakage Surface ns fluctuatio current leakage Bulk ( ) ( ) ( ) + + = 2 2 2 surface bulk noise E E E
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Variations with Applied Voltage Pulse Height Saturation region saturation VOLTAGE APPLIED HEIGHT PULSE trapping and ion Recombinat
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Pulse Rise Time on contributi er Preamplifi time dispersion ns 5 - 1 track along pairs h - e of density high particles charged Heavy - time Plasma v x t ime transit t Charge drift =
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Entrance Window or Dead Layer θ cos E ) E( dx dE E 0 0 0 = = t region depletion t kness layer thic dead = 0 E
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Dead Layer Thickness Measurements ( ) ( ) ( ) = = 1 cos 1 E E' E E E E' : Define 0 0 0 0 0 θ E ( ) dx dE E t / 0 0 = ( ) 1 cos / 1 0 E slope = E'
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Lecture24 - ENU 4612C/5615C Nuclear Radiation Detection and...

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