A multichannel X-ray detector

Abstract

A multichannel X-ray detector with a spatial resolution of 0.13 mm and a maximum of 200 effective channels is described. The detector consists of a conversion electrode to convert X-rays into electrons, a microchannelplate phosphor screen assembly to amplify the electron signal, a self-scanning array containing 1024 photodiodes and optics to form an image from the phosphor screen on the self-scanning array. A magnetic field is used to form an image of the electrons from the conversion electrode on the channelplate. The resolution of the detector is determined by the magnetic imaging system and the channelplate/phosphor-screen assembly.