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中文摘要：
该文研究并设计了一个由Vlasov阶梯型开口辐射器、椭圆面反射器和抛物面反射器组成的TE02模回旋管准光模式变换器。首先采用几何光学研究了阶梯型开口辐射器、椭圆面反射器和抛物面反射器的具体形状,再利用矢量绕射理论分析了其工作过程,最后结合94 GHz TE02模回旋管的具体参数,编写仿真程序详细讨论了工作模式在此模式变换器中的变换过程。模拟结果表明,94 GHz回旋管中的TE02模在输出窗处被转换为能量集中的准高斯波束,转换效率为78.35%。
英文摘要：
The quasi-optical mode converter for the TE02 mode gyrotron,consisting of a Vlasov stepped-cut launcher,an elliptical reflector and a parabolic reflector,was designed,fabricated and studied.Firstly,the stepped-cut launcher,the elliptical reflector and the parabolic reflector were analytically evaluated with geometric optics.Next,the operation process of the converter was analyzed with vector diffraction theory.And finally,operation of the mode conversion was simulated,based on the physical model of Vlasov mode converter for 94 GHz TE02 mode gyrotron.The simulated results show that the TE02 mode inside the 94 GHz gyrotron was converted into a higly Gaussian-like beam at the output window,and that the conversion efficiency was 78.35%.
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