Ionising radiation detector having proportional microcounters

Details Ionising radiation detector having proportional microcounters Ionising radiation detector having proportional microcounters

H - Electricity

01

J

H01J 47/06 (2006.01) G01T 1/18 (2006.01)

Patent

CA 2181913

The invention relates to an ionizing radiation detector having an enclosure (1) filled with a rare gas and within which is located a proportional counter (2) defining, between itself and an upper wall of the enclosure, an absorption zone (A) in which the radiation is ionized. This proportional counter has at least one anode (6) and at least one cathode (5), which are parallel to one another and separated by an insulating material layer (7), the cathode and the insulating material layer having at least one opening (8) in which there is a substantially uniform electric field and which constitutes a multiplication zone for the electrons resulting from the ionization of the radiation. Application to medical imaging, biological, crystallography and particle physics.

L'invention concerne un détecteur de rayonnements ionisants comportant une enceinte (1) remplie d'un gaz rare, à l'intérieur de laquelle est disposé un compteur proportionnel (2) délimitant, entre lui-même et une paroi supérieure de l'enceinte, une zone d'absorption (A) dans laquelle sont ionisés les rayonnements. Ce compteur proportionnel comporte au moins une anode (6) et au moins une cathode (5), parallèles l'une à l'autre et séparées par une couche de matériau isolant (7), la cathode ainsi que la couche de matériau isolant comprenant au moins une percée (8) dans laquelle règne un champ électrique sensiblement uniforme et qui constitue une zone de multiplication des électrons issus de l'ionisation des rayonnements. Application à l'imagerie médicale, la biologie, la cristallographie et la physique des particules.

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