Patent ID: 6727503
Filing Date: 2004-04-27
Classification: G01T

Abstract:
Two-dimensional detector of incident ionizing radiation composed of first particles, comprising:a stack of sheets of a first material configured to emit second particles by interaction with the incident ionizing radiation; layers of a semiconducting material that alternate with the sheets of the first material and that are able to be ionized by the second particles, each of the layers being associated with one of the sheets, the stack having opposite first and second faces each including corresponding edges of the sheets and layers, the detector configured to be laid out such that the ionizing radiation arrives on the first face, a length of each sheet measured from the first face as far as the second face being equal to at least one tenth of a free average path of the first particles in the first material; groups of parallel and electrically conducting tracks extending from the first face to the second face parallel to the layers, each group being associated with one of the layers and in contact with said one of the layers, the tracks being designed to collect charge carriers that are generated in the layers by interaction of the layers with at least one of the second particles and the first particles and that are representative of the first particles in intensity and in position; and means for creating an electric field capable of causing collection of charge carriers through the tracks, wherein said first material is a different material than a material used to form the layers of semiconducting material.