高品質・高電力マイクロ波発生装置(後進波発振器)の計算機解析(<小特集>核融合)

概要

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New computational treatment is shown to study the analysis of backward wave oscillator, which is one of a high-power microwave generator excited by an intensive relativistic electron beam. The frequency range of the generated microwaves is of the order of the 10 GHz. Dynamics of backward wave oscillator is solved by coupled systems of equations composed of relativistic fluid equations for electron beam and Maxwell's equation for microwave in a slow-wave structure. Newly developed analytical method, power expansion method reduce the original coupled system of partial differential equations in (r, z, t ) space into a coupled system of those in (z, t ) space, in which the spatial variation of waveguide radius is included. The reduced time evolutionary partial differential equations for nonlinear boundary value problems are solved numerically by newly developed numerical scheme, HIDM (Higher order Implicit Difference Method). It is shown that throttled type slow-wave structure is favorable for the production of high power and high quality microwaves.
日本シミュレーション学会の論文
1993-06-15