Title :
Digital processing of large-area avalanche photodiode signals for X-ray spectrometry applications
Author :
Fernandes, L.M.P. ; Simões, P. C P S ; Dos Santos, J.M.F. ; Morgado, R.E.
Author_Institution :
Dept. de Fisica, Coimbra Univ., Portugal
Abstract :
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 analogue pre-shaping with time constants of 200 ns followed by digital signal processing in a commercial 125-MHz digitiser. 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.
Keywords :
X-ray detection; X-ray spectrometers; analogue circuits; analogue-digital conversion; avalanche photodiodes; data acquisition; digital signal processing chips; nuclear electronics; position sensitive particle detectors; pulse shaping circuits; X-ray spectrometry; analogue preshaping; background level; data acquisition; detector energy resolution; digital processing; digitiser; electronic noise pulses; large-area avalanche photodiode signals; peak distortion; pulse-shape discrimination techniques; rise time; time constants; Avalanche photodiodes; Detectors; Digital signal processing; Instruments; P-n junctions; Physics; Signal processing; Spectroscopy; Voltage; X-ray detection;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1009693
