Digital pulse-shape analyzer based on fast sampling of an integrated charge pulse

Author

Jordanov, Valentin T. ; Knoll, Glenn F.

Author_Institution

Dept. of Nucl. Eng., Michigan Univ., Ann Arbor, MI, USA

Volume

1

fYear

1994

fDate

30 Oct-5 Nov 1994

Firstpage

498

Abstract

A novel configuration for pulse-shape analysis and discrimination has been developed. The current pulse from the detector is sent to a gated integrator and then sampled by a flash analog-to-digital converter (ADC). The sampled data are processed digitally, thus allowing implementation of a near-optimum weighting function and elimination some of the instabilities associated with the gated integrator. The analyzer incorporates pileup rejection circuit that reduces the pileup effects at high counting rates. The system was tested using a liquid scintillator. Figures of merit for neutron-gamma pulse-shape discrimination were found to be: 0.78 for 25 keV (electron equivalent energy) and 3.5 for 500 keV

Keywords

analogue-digital conversion; detector circuits; digital circuits; discriminators; gamma-ray detection; integrating circuits; liquid scintillation detectors; neutron detection; nuclear electronics; pulse height analysers; sampled data circuits; 25 to 500 keV; digital pulse-shape analyzer; fast sampling; flash analog-to-digital converter; gated integrator; integrated charge pulse; liquid scintillator; near-optimum weighting function; neutron-gamma pulse-shape discrimination; pileup rejection circuit; pulse-shape analysis; Detectors; Digital filters; Finite impulse response filter; Nonlinear filters; Photomultipliers; Pulse shaping methods; Sampling methods; Shape; Signal detection; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record

Conference_Location

Norfolk, VA

Print_ISBN

0-7803-2544-3

Type

conf

DOI

10.1109/NSSMIC.1994.474334

Filename

474334