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Digital rise-time discrimination of large-area avalanche photodiode signals in X-ray detection

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4 Author(s)
Fernandes, L.M.P. ; Dept. de Fisica, Coimbra Univ., Portugal ; Simoes, P.C.P.S. ; Santos, F.P. ; Morgado, R.E.

The response of a large-area avalanche photodiode to X-rays was investigated by applying pulse-shape discrimination techniques based on rise time. The method employed analog preshaping with time constants of 200 ns followed by digital signal processing in a commercial 125-MHz digitizer. Pulse rise-time discrimination was applied to improve detector energy resolution, background level, and peak distortion. Electronic noise pulses can be efficiently removed at the expense of data-acquisition throughput.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:49 ,  Issue: 4 )

Date of Publication:

Aug 2002

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