A cavity with reduced mode conversion for gyrotrons |
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| Authors: | O. Dumbrajs M. Thumm J. Pretterebner D. Wagner |
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| Affiliation: | (1) Arbeitsbereich Hochfrequenztechnik, Technische Universität, Hamburg-Harburg, D-2100 Hamburg 90, Germany;(2) Institut für Technische Physik Kernforschungszentrum Karlsruhe and Institut für Höchstfrequenztechnik und Eletronik, Universität Karlsruhe, D-7500 Karlsruhe 1, Germany;(3) Institut für Plasmaforschung, Universität Stuttgart, D-7000 Stuttgart 80, Germany |
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| Abstract: | Mode conversion at discontinuities of an ordinary gyrotron cavity is examined. It is shown how the production of unwanted spurious modes can be reduced substantially by introducing smooth transition regions between the individual parts of the cavity. The cavity of the 140 GHz KfK gyrotron operating in the TE10,4 mode is used as an example. Cavity and adjacent tapered output waveguide are optimized as a single unit. |
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