Mode converter and power-dividing device for a microwave tube, and microwave tube with such a device

摘要

the invention relates to a device for the converter mode and power divider for electron tube with the application mainly for gyrotrons and tubes of the same family. these tubes have an outlet chamber 2 in the shape of revolution about an axis and a hollow electron beam 1 which travels on the same axis.the device according to the invention is a structure comprising secondary wave guides 6 arranged with azimuthal symmetry around the axis of the outlet chamber, each guide 6 having holes 7 on the outer wall of the coupling, the more remote from the axis, the holes 7 are so in order to excite a mode of desired within the guide.according to an important feature of the invention, the vacuum tube operates in a tem mode, azimuthal index m high, and the number of side guides 1 = m. in another important feature of the invention, the side guides 6 are of trapezoidal cross-section.according to another feature of the invention, the side guides 6 are excited in the fundamental mode. according to another feature of the invention, the side guides are provided with windows (58) the outside of the vacuum tube.;application to the heating of plasmas in fusion and particle accelerators.