Low self-bias variable gap diode

Details Low self-bias variable gap diode Low self-bias variable gap diode

1975-06-10

1976-10-19

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250395, 250385, G01T 118

Patent

active

039873056

ABSTRACT:
A parallel-plate variable-gap diode is described which is used to detect X nd gamma radiation pulses. The collector of the diode is comprised of an interior circular portion and a concentric external annular portion, the collecting surfaces of which are coplanar and noncontiguous. A shielded low-inductance resistor-ring shunts the bulk of the sampled current back through the annular portion of the collector to the emitter thereby reducing self-bias effects. The central location and relatively small size of the current sampler minimize the perturbing influence of the walls at the periphery of the cavity. A one-dimensional electron transport analysis can therefore provide the link between the incident radiation and the observed current response of the diode. The cylindrical walls of the cavity are interchangeable spacers which permit the variation of separation between emitter and collector.

REFERENCES:
patent: 2440167 (1948-04-01), Broxon
patent: 2521656 (1950-09-01), Segre et al.
patent: 2824252 (1958-02-01), Redman et al.
patent: 3271691 (1966-09-01), Hendon

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