Patent ID: 8130899

Claim:
A configuration for electron beam tomography, comprising: a device for generating, focusing, and deflecting an electron beam within a vacuum chamber; annular or partly annular targets arranged successively along a beam direction within said vacuum chamber for decelerating the electron beam; a plurality of X-ray detector arcs formed of individual detectors placed next to one another, said X-ray detector arcs being disposed in a coplanar relation and with a slight axial offset to said targets; a recording aperture for an examination object; and detector diaphragms configured to suppress scattered radiation; each target having openings of a given width formed therein and material webs therebetween, regularly arranged in a circumferential direction; said openings in said targets being respectively situated on a path formed by a cross section of a shell of an electron beam cone with the respective said target, with a tip of the electron beam cone being defined in space by a deflection point of the electron beam and a shell thereof through the paths of the electron beam; said targets, following a forward-most target in the beam direction, respectively being disposed with a small angular offset with respect to an optical axis to the respective said target situated in front, and with an electron beam circulating along the shell of the electron beam cone successively irradiating said material webs between said openings of all targets with at least part of cross section thereof; and an X-ray detector arc for each said target disposed in coplanar fashion and in a radial direction in front of or behind the respective said target.