3mm波段二次谐波渐变复合腔回旋管的非线性模拟
Nonlinear simulation on 3 mm band second-harmonic complex cavity gyrotron with gradual transition
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摘要: 利用含电流的传输线方程，并在考虑多模注-波互作用及多模耦合的情况下，利用自主开发的多模高次谐波渐变结构复合腔回旋管的注-波互作用数值模拟软件，对3 mm波段二次谐波渐变复合腔回旋管进行了自洽非线性模拟，分析了H02-H03模式对下磁场系数、电流、电子注速度比对注-波互作用效率的影响。计算结果表明，在合适的腔体结构尺寸下，以及合适的磁场系数、电流、速度比下，注-波互作用效率可达27％。Abstract: Starting from general transmission line equation with an electron beam, a self-consistent nonlinear analysis on 3 mm band second-harmonic complex cavity gyrotron with gradual transition is presented, in which the multiple mode interacting with a electron beam and mode coupling are taken into account, through a simulation code of self-consistent nonlinear beam-wave interaction made by ourselves. The influences of the magnetic field coefficient and current and the velocity ratio of the electron beam under the interaction between the electron beam and H02-H03 RF field for second-harmonic gyrotron are analyzed. The results show that an electron efficiency over 27% is predicted for suitable dimensions for the complex cavity and magnetic field coefficient and current and the velocity ratio of th
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Key words:
- 3mm band /
- second-harmonic /
- gyrotron /
- complex cavity /
- multiple mode interacting with an electron beam
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