MEASUREMENT OF VERY LOW REACTIVITIES BY PSEUDO-ALEATORY EXCITATION OF THE SOURCE (in French)
A method for the measurement of very low reactivities is proposed utilizing a fast neutron (14-Mev) source, modulated electronically by a pseudo- aleatory wave of the white-background type The reactivity is estimated by examining the pulse response of the reactor, this pulse response being measured by intercorrelation between the input (source intensity) and the output (neutron population). The theory of the determination of the reactivity of the pulse response and of the pulse response by intercorrelation is discussed. Then the experimental determination of the intercorrelation function is given. The theory, design, and construction of a pseudo-aleatory square-wave generator with binary counter-reaction displacement registration is given. (J.S.R.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-009872
- OSTI ID:
- 4740885
- Journal Information:
- Bull. Inform. Sci. Tech. (Paris), Vol. Vol: No. 61; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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