A portable measurement system for subcriticality measurements by the CF-source-driven neutron noise analysis method

A description is given of a portable measurement system consisting of a personal computer used as a Fourier analyzer and three detection channels (with associated electronics that provide the signals to signal-to-digital converters) that has been assembled to measure subcriticality by the /sup 252/Cf-source-driven neutron noise analysis method. The system contains a parallel-plate ionization chamber containing /sup 252/Cf, and two /sup 3/He proportional counters. It is capable of sampling signals at rates up to 80 kHz and processing these data at rates (to form the appropriate spectra) of 2 kHz.<
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