Title :
Minimum-noise filter for baseline estimation in radiation detection systems
Author :
Pullia, A. ; Ripamonti, G. ; Santo, D.
Author_Institution :
Dipartimento di Elettronica, Politecnico di Milano, Italy
Abstract :
Baseline height estimation in nuclear pulse spectrometry can be optimized by using a proper weight-function. The minimum-noise weight-function for baseline estimation, constrained to a finite duration, is theoretically derived in this paper. Baseline restoration can be subsequently performed by subtracting the minimum-noise baseline estimation to the output signal pulse. The overall signal-to-noise performance obtained using minimum-noise baseline estimation for pulse height correction is compared to that obtained with routinely used Base Line Restorers. An improvement of up to 16% in the Equivalent Noise Charge, with respect to a classic fast Base Line Restorer, can be theoretically achieved in case of a simple triangular pulse shaping. The minimum-noise baseline weight-function can be synthesized in practice by means of a digital processing unit
Keywords :
detector circuits; nuclear electronics; pulse circuits; pulse shaping circuits; Equivalent Noise Charge; baseline estimation; classic fast Base Line Restorer; digital processing unit; finite duration; minimum-noise baseline; minimum-noise filter; minimum-noise weight-function; nuclear pulse spectrometry; output signal pulse; pulse height correction; radiation detection systems; signal-to-noise performance; triangular pulse shaping; Capacitance; Energy resolution; Filters; Noise generators; Pulse amplifiers; Pulse measurements; Pulse shaping methods; Radiation detectors; Signal restoration; Spectroscopy;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504222