MIRROR SYNTHESIS FOR GYROTRON QUASI-OPTICAL MODE CONVERTERS

A new approach for the design of a quasi-optical gyrotron mode convert er is proposed. It is based on the synthesis of quasi-optical mirrors using diffraction (Heimholtz-Kirchhoff) integrals. First application o f such a method we already described in [1, 2]. Now a more powerful te chnic is used to provide optimal distributions of the wave beam field. It is shown that by means of specially shaped mirrors parameters of t he main converter are enhanced strongly. In this paper we review the s earch for the optimal scheme of the converter, present and compare res ults of calculations and measurements of the gyrotron wave beam.