Patent ID: 6278121
Filing Date: 2001-08-21
Classification: H01J

Abstract:
An ionization chamber for radiometric measuring instruments, comprising:a housing, which is filled with an ionizable gas having at least one radiation inlet window;a plurality of collector electrodes, having a potential different from that of the housing;a plurality of insulated electrical connections each extending outside of the housing through an insulator and being respectfully connected to the collector electrodes;the housing having an interior divided into a plurality of adjacent and mutually delineated measurement sections, each measurement section including a collector electrode of the plurality of collector electrodes; anda guard ring that is an electrically conductive region which surrounds the insulated electrical connections as a group such that the guard ring is disposed electrically insulated from the housing as well as from the insulated electrical connections, wherein the guard ring is in a currentless state at the potential of at least one of the collector electrodes.