Patent ID: 6967329

Claim:
A radiation detector for energy-dispersive detection of X-ray photons, comprising gaseous medium in a given space for generating free charges as a response to the interaction of an X-ray photon with said medium, an outer wall defining said space, and electrodes for collecting the generated free charges in order to realize an indication relating to a detected X-ray photon; wherein: said space comprises a first detector subspace and a second detector subspace and a wall of net or wires between said first detector subspace and said second detector subspace, wherein said wall of net or wires encircles said first subspace and is adapted to be coupled to a cathode potential, the second detector subspace separates the first detector subspace from the outer wall defining said space, and the radiation detector comprises a first anode for collecting free charges in the first detector subspace and a second anode for collecting free charges in the second detector subspace, said first and second anodes being adapted to be coupled to anode potentials that are more positive than said cathode potential.