利用三维CFDTD PIC方法进行回旋管腔相互作用热测试

IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI:10.1109/IVEC.2014.6857503

M. C. Lin, D. Smithe, W. Guss, R. Temkin

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引用次数: 9

摘要

由于回旋管腔体结构的开放性和为实现高效率而采用的高阶模态激励，在三维和时域上对回旋管腔体相互作用进行建模是非常具有挑战性的。本文提出了一种三维共形时域有限差分(CFDTD)细胞内粒子(PIC)方法来进行回旋管腔相互作用的热测试。通过定制的回旋束发射，在麻省理工学院的回旋管腔中不仅观察到正向波，而且还观察到反向波的相互作用，这与麻省理工学院最近的一项实验一致。初步结果表明，三维CFDTD PIC方法可以为回旋管腔相互作用的研究提供一种替代的建模工具，从而进一步提高效率和研究模式竞争。

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Hot test of gyrotron cavity interaction using a 3D CFDTD PIC method

Modeling a gyrotron cavity interaction in 3D and time-domain is very challenging due to the open-end features of cavity structure and higher-order mode excitation employed to achieve high efficiency. In this work, a 3D conformal finite-difference time-domain (CFDTD) particle-in-cell (PIC) method has been developed to perform a hot test of gyrotron cavity interaction. With a tailored gyrobeam emission, not only forward wave but also backward wave interactions have been observed in an MIT gyrotron cavity, consistent with a recent experiment at MIT. Our preliminary results show that the 3D CFDTD PIC method could provide an alternative modeling tool for studying the gyrotron cavity interaction for further improving efficiency and studying mode competition.

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IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference

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