Published 1966 | Version v1
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The changers of time constant in the filters of DC logarithmic period meter - results and possibilities (1964)

Creators

  • 1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires

Description

The optimum transfer function for a DC logarithmic period-meter show that it is necessary to chose the time constant of the filters in accordance with the number of informations given by the neutron detector, if it is desirable to obtain short response time. Theoretical and experimental results of a DC logarithmic period-meter using a filter with time constants with level of the DC out put signal of the logarithmic amplifier are given when an DC ionization chamber is used. Theoretical results are also given when a neutron pulse detector is used. Prototype of the period-meter is also described. (author)

Availability note (English)

Available from INIS in electronic form

Abstract (French)

L'expose debute par un rappel sur la determination de la fonction de transfert optimale pour un periodemetre logarithmique. Ce rappel permet de montrer qu'il est necessaire d'asservir les constantes de temps des filtres a la puissance neutronique. L'etude d'un periodemetre fonctionnant a partir de chambres d'ionisation et utilisant un systeme de filtrage a constantes de temps variable est ensuite developpee. Des resultats experimentaux obtenus a partir d'une maquette concretisent ce qui precede. On indique egalement une extension possible au traitement analogique des signaux fournis par d'autres types de detecteurs (chambres a fission - compteurs a BF 3). En conclusion du rapport, un prototype (le P.L.S.M.) est presente. (auteur)

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Additional details

Additional titles

Original title (French)
Variation des constantes de temps de filtrage dans les periodemetres logarithmiques. Resultats et possibilites (1964)

Publishing Information

Imprint Pagination
[36 p.]
Report number
CEA-R--2940

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
36047779
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
ELECTRONIC EQUIPMENT; FREQUENCY ANALYSIS; IONIZATION CHAMBERS; NEUTRON DETECTORS; OPTIMIZATION; PERIODICITY; TRANSFER FUNCTIONS
Descriptors DEC
EQUIPMENT; FUNCTIONS; MEASURING INSTRUMENTS; RADIATION DETECTORS; VARIATIONS

Optional Information

Notes
6 refs.