Ionization chamber for measuring the profile of a radiation fiel

Details Ionization chamber for measuring the profile of a radiation fiel Ionization chamber for measuring the profile of a radiation fiel

1983-11-17

1985-04-30

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

G01T 118

Patent

active

045146330

ABSTRACT:
An ionization chamber for measuring the profile of a radiation field is provided which comprises a first electrode and a second electrode arranged parallel to said first electrode, both electrodes forming a gap therebetween. A shield made of a material opaque to ions produced by the radiation field is movably arranged in said gap between said electrodes and has an aperture, which between said electrodes forms a measuring volume. The ionization chamber further comprises means for moving said shield together with said aperture along said gap between said electrodes.

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Article "A Simple, Nondestructive Profile Monitor for External Proton Beams" by F. Hornstra and J. R. Simanton in Nuclear Instruments and Methods 68 (1969) pp. 138-140; North-Holland Publishing Co.
Medical Physics, vol. 7, No. 2, Mar./Apr. 1980, New York, by D. J. Keys, "Thin-Walled Parallel Plate Ionization Chamber for use with Photon and Electron Beam Dosimetry", pp. 163-164.

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