Theoretical analysis of mode competition in a gyrotron
Grigorieva N.V. (1), Ryskin N.M. (1, 2)
1 – Kotelnikov Institute of Radio-Engineering of RAS, Saratov Branch
2 – Saratov State University
Abstract
This paper presents a theoretical model describing interaction of two modes in a gyrotron with fixed Gaussian field profile operating at the fundamental cyclotron harmonic. The model uses electron susceptibility function that is pre-calculated numerically for various values of the amplitudes of the two modes and cyclotron resonance mismatch, and then is expressed as a function of these variables interpolating the calculated dependences. Based on the developed model, an analysis of mode competition processes is conducted, and a comparison with numerical simulations is provided. Phase portraits of a two-mode gyrotron model were plotted for different values of normalized beam current and cyclotron resonance mismatch.
Speaker
Grigorieva Nataliia Vadimovna
Saratov Branch, Saratov State University, Kotelnikov Institute of Radio-Engineering of RAS
Russia
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