Method and device for the automatic reading of the irradiation dose of a portable dosimeter
AssigneeCommissariat a l'Energie Atomique
InventorsMichel Hulot, Raymond Prigent
Life of this patent
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Abstract
A method for the automatic reading of the radiation dose of a portable dosimeter with an ionization chamber provided with a capacitor C.sub.1, and a device for carrying out said method, said device comprising means for measuring the value of the ionization chamber charge at each reading operation and means for storing the value of the charge of said ionization chamber, as well as means for calculating the radiation dose D at any moment from one of the stored values and from the value of the charge of said chamber at said moment.
Claims5
A device for automatically reading the radiation dose of a portable dosimeter with an ionisation chamber, comprising:
- means for measuring the value of the ionisation chamber charge at each reading operation;
- means for storing the value of the charge of said ionisation chamber at each reading operation;
- means for calculating the radiation dose, at any moment, from one of the stored values and from the chamber charge value at said moment;
- and means for biasing the ionisation chamber, after a reading operation, with a voltage equal to the voltage corresponding to the just measured charge;
- wherein said means for storing the value of the charge of said ionisation chamber at each reading operation are connected to said means for measuring the ionisation chamber charge, via an analogue-digital converter;
- and wherein said means for measuring the ionisation chamber charge comprise a pre-amplifier-integrator for said ionisation chamber, designed according to the capacitive divisor constituted by a capacitor of said chamber and by an integrating capacitor of said pre-amplifier-integrator.
Dependencies are inferred from the claim text.