Gyrotrons: relativistic case, <i>E</i> and <i>H</i> modes, output converter design

Abstract

Abstract Self-consistent non-linear equations of a relativistic gyrotron with the operational mode E 01 as well as the E 01 and H 01 modes interacting are presented. On their basis, we have optimized the efficiency of a number of gyrotron variants—with uniform and non-uniform magnetic field and regular or irregular waveguide systems. An analysis of the peculiarities of the interaction in such variants has been performed. It has been shown that the total electron efficiency of relativistic gyrotrons with E01 working mode can reach 35-45%. The interaction of the E01 and H01 modes (at the E 01 working mode) is of an interference nature and under optimal conditions the efficiency may increase by 10%. An algorithm has been suggested to optimize the profile of the gyrotron waveguide output converter based on the optimization parameters separation technique. Results are presented for the case of the H01 working mode.