Radiation detectors and imaging devices autoradiographic comprising such detectors

radiation detector comprising one or more structure (s) amplifier (s) (7) each comprising an input electrode (8) and an output gate (9), held apart by a spacer (11) insulating. Each strut (11) defines the amplification space (22) for generating electron avalanche. The dimensions of these amplification spaces (22) are decorrelated from those of meshes of the grille (9).