Ionizing radiation detector system

Details Ionizing radiation detector system Ionizing radiation detector system

1988-06-16

1990-06-05

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250361R, 25036301, 250386, 250387, G01T 1205

Patent

active

049316532

ABSTRACT:
An optical ionizing radiation detector system (10) for determining the three-dimensional spatial distribution of all of the secondary electrons produced by the passage of ionizing radiation through a selected gas is provided. The detector system (10) can be used over a wide range of particle energies and gas pressures. The ionizing radiation passing through the gas produces prompt fluorescence and secondary electrons. A coincidence detector (30) recognizes coincident events of prompt fluorescence in the gas contained within that chamber to initialize the system cycle. At that time, an AC electric field is generated by an R.F. pulse generator (40) to localize the secondary electrons proximate their respective positions of production. Cameras (42) and 42'), preferably of a digital type, produce an image of the localized electrons to determine their three-dimensional spatial positions. After such positions are determined, a unidirectional electric field is generated by clearing power supply (36) for clearing all charges from the gas chamber.

REFERENCES:
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patent: 4031396 (1977-06-01), Whetten et al.
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S. R. Hunter, "Evaluation of a Digital Optical Ionizing Radiation Particle Track Detector", Nuclear Instruments and Methods, vol. A260 (1987), pp. 469-477; .COPYRGT.1987, Elsevier Science Publishers B.V.
S. R. Hunter, "Evaluation of a Digital Optical Ionizing Radiation Particle Track Detector", Oak Ridge National Laboratory Report ORNL/TM-10421 (Jun. 1987).
G. Cavalleri, "Measurement of Lateral Diffusion Coefficients and First Townsend Coefficients for Electrons in Helium by an Electron-Density Sampling Method", Physical Review, vol. 179, No. 1 (Mar. 5, 1969), pp. 186-202.
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Jack Sandweiss, "The High-Resolution Streamer Chamber", Physics Today (Oct. 1978), pp. 40-45.

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