Patent ID: 9431222
Filing Date: 2016-08-30
CPC Classification: G01N,G01T,H01J

Claim Text:
1. A dosimetry device for an energy particle beam coming from a source and comprising at least first and second ionization chambers each comprising a collector electrode and a polarization electrode, said electrodes of each ionization chamber being separated by a gap or space comprising a fluid, said ionization chambers being configured to be passed through by an energy particle beam coming from a same source, wherein the ionization chambers have different charge collection efficiency factors, and the device comprises an acquisition device connected to a computer configured to perform an algorithm for calculating the dose rate deposited by said particle beam based on: measuring an output signal in each considered ionization chamber; and a gain factor relative to a first ionization chamber, given by the equation where G is the gain factor relative to the first ionization chamber, is the ratio of theoretical values of output signals (i f said theoretical output signal values (i 1 , i 2 ) and f 1 being calculated as a function of intrinsic and/or extrinsic parameters of said considered chambers, and as a function of one or more pre-defined values of the current intensity of the particle beam, said gain factor G being independent of the value of said particle beam current intensity.