We improved the accuracy of gyrotron performance analysis using particle-in-cell (PIC) code. To accurately predict the performance of a device under development, an electron beam (e-beam) that has information that best represents realistic e-beam information should be used for a cavity simulation, and an investigation of factors that affect the e-beam information is necessary at the design stage. Thus, we conducted an intensive analysis of the association between the e-beam information changed by nonideal factors and the performance variation of the gyrotron cavity. The altered e-beam information was obtained using a fully 3-D commercial code (Computer Simulation Technology (CST) Studios), with consideration of manufacturing imperfections and misalignment. The acquired e-beam information was then directly imported and used for gyrotron cavity simulations with the CST PIC code. This allowed us to investigate the gyrotron performance degradation caused by the nonideal e-beam information. Additionally, we validated the CST results using our in-house gyrotron code (UNIST Gyrotron Design Tool, UGDT). Finally, the simulation results were compared with previously published experimental data.

中文翻译：

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基于全3D磁场和非理想因素改变的电子束信息的精确陀螺仪性能预测

我们使用单元中粒子（PIC）代码提高了回旋管性能分析的准确性。为了准确地预测正在开发的设备的性能，应使用具有最能代表实际电子束信息的信息的电子束（电子束）进行腔模拟，并研究影响电子束信息的因素。在设计阶段是必需的。因此，我们对由非理想因素改变的电子束信息与回旋管腔性能变化之间的关联进行了深入分析。考虑到制造缺陷和未对准问题，使用完整的3D商业代码（计算机仿真技术（CST）Studios）获得了更改后的电子束信息。然后，直接导入获取的电子束信息，并使用CST PIC代码将其用于回旋腔模拟。这使我们能够研究由非理想电子束信息引起的回旋加速器性能下降。此外，我们使用内部回旋管代码（UNIST回旋管设计工具，UGDT）验证了CST结果。最后，将模拟结果与先前发布的实验数据进行了比较。