The design studies of a relatively higher-order mode, TE _10,4 , gyrotron have been presented for reduced beam interception, ohmic loss, and dimensional tolerance issues. The tapered RF interaction cavity and the nonlinear taper (NLT) designed using axial mode profile calculations were optimized with time-dependent, multimode theory with tapered magnetic field profile. 3-D particle-in-cell (PIC) simulation predicted the desired device temporal growth with ~40% efficiency and the percentage of agreement with the analytical values is presented. Device behavior under practical tolerances has also been studied confirming the rated device performance. Further, its interaction structure design has been checked from thermal considerations without any additional cooling fins. Furthermore, Denisov type quasi optical mode (QOM) launcher along with a sapphire disk window has been designed using in-house developed algorithm and coupled-mode theory-based code. The designed profile provides >98% Gaussian content on the launcher cut.

中文翻译：

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TE10,4Mode、100kW 频段回旋管振荡器的设计、分析和仿真研究


已经提出了相对高阶模式 TE _10,4回旋管的设计研究，以减少光束拦截、欧姆损耗和尺寸公差问题。使用轴向模式轮廓计算设计的锥形射频相互作用腔和非线性锥形 (NLT) 通过具有锥形磁场轮廓的瞬态多模理论进行了优化。 3D 细胞内颗粒 (PIC) 模拟预测了所需器件的时间增长，效率约为 40%，并给出了与分析值的一致百分比。还研究了实际公差下的器件行为，确认了额定器件性能。此外，其交互结构设计已从热考虑方面进行了检查，无需任何额外的散热片。此外，采用内部开发的算法和基于耦合模式理论的代码设计了带有蓝宝石圆盘窗口的杰尼索夫型准光模（QOM）发射器。设计的轮廓在发射器切口上提供>98%高斯内容。