Apparatus for applying accelerated electrons to fluids and inner walls of hollow bodies

An apparatus for impinging fluids and inner walls of hollow bodies with accelerated electrons, comprising:

• a cylindrical electron exit window as a component of a cylindrical housing having a cylinder axis and enclosing an evacuable space;
• at least one wire-shaped, strand-shaped, rod-shaped, annular, helical, or cylindrical cathode which is arranged within the evacuable space and is enclosed by the cylindrical electron exit window and by a cylindrical control grid, wherein the cylindrical control grid has a diameter that is smaller than the diameter of the cylindrical electron exit window and wherein a first power supply unit is connected in an electrically conductive manner between the wire-shaped, strand-shaped, rod-shaped, annular, helical, or cylindrical cathode and the cylindrical electron exit window, so that electrons are emittable from the wire-shaped, strand-shaped, rod-shaped, annular, helical, or cylindrical cathode and accelerated radially away from the cylinder axis of the cylindrical housing in the direction of the cylindrical electron exit window, wherein
• a) a first hollow cylinder encloses the cylindrical electron exit window, and the first hollow cylinder and the electron exit window are spaced apart from one another, so that a first annular free space is formed between the first hollow cylinder and the electron exit window;
• b) first support elements of the cylindrical control grid and second support elements of the concentrically arranged, cylindrical electron exit window run so as to be aligned point-symmetrically along the respective lateral surfaces and are arranged azimuthally within equal angular segments with an angle ω.