Method for pulse shape regulation and discrimination in a...

G - Physics – 01 – T

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G01T 1/17 (2006.01) G01R 29/033 (2006.01) G01V 5/12 (2006.01) H03K 5/19 (2006.01)

Patent

CA 2214231

The present invention is based on a digital pulse sampling and detection technique, which samples the (nuclear) pulse train at a constant frequency asynchronously with the actual pulses, which occur at random times. The fact that many samples are available for each pulse allows many pulse train analysis operations, such as: 1 ) pulse integration (area determination under pulse), 2) pulse shape discrimination, 3) pile-up rejection and 4) time of arrival determination (multiscaler analysis) which traditionally were done through complex analog circuits to be done in a compact digital arrangement. This invention deals with the first 3 aspects of digital pulse train analysis.

La présente invention se fonde sur une technique de détection et d'échantillonnage d'impulsions numériques consistant à échantillonner le train d'impulsions (nucléaires) à une fréquence constante asynchroniquement avec les impulsions réelles, selon une chronologie aléatoire. Le fait que de nombreux échantillons soient disponibles pour chaque impulsion permet d'exécuter dans un montage numérique compact de nombreuses opérations d'analyse de trains d'impulsions qui faisaient traditionnellement appel à des circuits analogiques complexes, par exemple : 1) intégration d'impulsions (détermination de la zone sous l'impulsion), 2) discrimination de formes d'impulsion, 3) rejet d'empilement et 4) détermination du temps d'arrivée (analyse par échelles multiples). L'invention touche les trois premiers aspects de l'analyse de trains d'impulsions numériques.

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