Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Ralf Blüthner

Jörg Kubusch

Frank-Holm Rögner

Gösta Mattausch

André Weidauer

Volker Kirchhoff

Rainer Labitzke

Burkhard Zimmermann

Ignacio Gabriel Vicente Gabas

Apparatuses and methods are provided for applying accelerated electrons to a gaseous medium by means of an electron beam generator, which has at least one cathode for emitting electrons and at least one electron exit window, wherein a) the at least one cathode is annular and the at least one electron exit window is in the form of an annular first hollow cylinder, the annular electron exit window in the form of the first hollow cylinder forms an inner wall of an annular housing of the electron beam generator, wherein the electrons emitted by the cathode are accelerated to the ring axis of the annular housing; b) an annular second hollow cylinder is arranged within the electron exit window in the form of the first hollow cylinder and delimits an annular space between the first hollow cylinder and the second hollow cylinder; c) a cooling gas is fed through the annular space between the first hollow cylinder and the second hollow cylinder; and d) the gaseous medium to which accelerated electrons are to be applied is fed through the second hollow cylinder.

Apparatus and method for applying accelerated electrons to gaseous media

An apparatus is provided for generating accelerated electrons, including a housing; an inlet for supplying a working gas; at least one first cathode; and at least one first anode, between which a corona discharge plasma can be generated. Ions from the corona discharge plasma can be accelerated onto the surface of a second cathode. Electrons emitted by the second cathode can be accelerated in the direction of the electron exit window by means of a second electric voltage applied between the second cathode and a second anode. The housing, the second cathode, and the electron exit window are ring-shaped. The ring-shaped space is divided into ring segments. Each ring segment has at least one wire-shaped electrode, which extends through the ring segment. At least one separate power supply device is associated with each ring segment, by means of which the strength of the electrical current is adjustable.

Apparatus for generating accelerated electrons

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Dresden, Germany

Ralf Blüthner