Numerical analysis of the influence of a Gyrotron's cavity walls curvature

The starting current of a gyrotron and the magnetic field power at witch ignition of the gyrotron occurs have a very large impact on the work of the gyrotron. The paper shows the methods of numerical analysis of this issue with particular emphasis on the influence of the curvature radius of the resonator walls on the starting current and the magnetic field. As a rule, a reduction of the starting current for the selected work mode is expected. Numerical analysis indicates that the use of appropriate equations taking into account the curvature of the walls makes it possible to more accurately predict the starting parameter.