Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1979-11-29
1981-04-28
Smith, Alfred F.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250385, 313 93, G01T 118, H01J 4700
Patent
active
042648165
ABSTRACT:
An ionization chamber has separate drift and detection regions electrically isolated from each other by a fine wire grid. A relatively weak electric field can be maintained in the drift region when the grid and another electrode in the chamber are connected to a high voltage source. A much stronger electric field can be provided in the detection region by connecting wire electrodes therein to another high voltage source. The detection region can thus be operated in a proportional mode when a suitable gas is contained in the chamber. High resolution output pulse waveforms are provided across a resistor connected to the detection region anode, after ionizing radiation enters the drift region and ionize the gas.
REFERENCES:
patent: 3207938 (1965-09-01), Anton
patent: 3585003 (1971-06-01), Scolnick
patent: 3603831 (1971-09-01), Kimmel
patent: 3786270 (1974-01-01), Borkowski et al.
patent: 3911279 (1975-10-01), Gilland et al.
Walenta, A. H., "The Time Expansion Chamber and Single Ionization Cluster Measurement", Proceedings of the IEEE Transactions on Nuclear Science, vol. NS-26, Feb. 1979, pp. 73-80.
Belkin Leonard
Besha Richard G.
Cornish Cornell D.
Howell Janice A.
Smith Alfred F.
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