Device for determining the spatial distribution of radiation

Details Device for determining the spatial distribution of radiation Device for determining the spatial distribution of radiation

1980-03-24

1982-02-23

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

G01T 118

Patent

active

043170382

ABSTRACT:
The spatial distribution of mono-energetic x-rays from a point source, is determined by a device which comprises a gas filled enclosure having a flat radiation entrance window. Flat electrodes establish an electrical field of such amplitude that there occurs conversion of said radiation into photo electrons and avalanche electron multiplication resulting in delivery of a burst or pulse of electrons per conversion whose height is an increasing function of the travel path of the electrons avalanche from the location of the conversion event to the planar outlet electrode. A detector located in a second portion of the enclosure receives the pulse of electrons and determines the coordinates and the pulse height of the pulse.

REFERENCES:
patent: 3786270 (1974-01-01), Borkowski et al.
patent: 4031396 (1977-06-01), Whetten et al.
patent: 4047041 (1977-09-01), Houston
patent: 4076981 (1978-02-01), Sparks et al.
patent: 4119853 (1978-10-01), Shelley et al.
patent: 4179608 (1979-12-01), Walenta
patent: 4193000 (1980-03-01), Shirayama et al.
Charpak et al., "The Spherical Drift Chamber for X-Ray Imaging Applications", Nuclear Instruments and Methods 122, 1974, pp. 307-312.

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