Preamplifier for a wide range neutron flux monitoring system

Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Flux monitoring

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376259, G21C 1700

Patent

active

044938110

ABSTRACT:
A preamplifier for a wide range neutron flux monitoring system is disclosed. The preamplifier contains first to fifth amplifiers and a selection switch. The first amplifier for high frequency band amplification has a low input impedance circuit. The second amplifier for low frequency band amplification has a high input impedance circuit. Either of the first and second amplifiers can provide a path for the neutron flux level signal derived from a detector according to the frequency of the neutron flux level signal. The third amplifier (pulse amplifier) amplifies the output signal of the first amplifier and transfers the amplified signal to a pulse signal counting system. The lower frequency band Campbell signal is applied to the Campbelling system, through the second amplifier, the fourth amplifier (low frequency band Campbelling amplifier), and the selection switch. The higher frequency band Campbell signal is applied to the Campbelling system, through the first amplifier, the fifth amplifier (high frequency band Campbell amplifier), and the selection switch.

REFERENCES:
patent: 2982473 (1961-05-01), Goertzel
patent: 3246154 (1966-04-01), Harrison
patent: 3296440 (1967-01-01), Schultz et al.
patent: 3330954 (1967-07-01), Cox et al.
patent: 3931522 (1976-01-01), Rusch
patent: 4045282 (1977-08-01), Barbier
patent: 4186048 (1980-01-01), Thomas

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