The simulation survey of TAE Technologies has demonstrated that high harmonic fast wave (HHFW) heating is a promising method for core electron heating of FRC plasma. This study mainly describes the HHFW antenna mechanical design and assembly on the basis of the results of electromagnetic simulations performed by Oak Ridge National Laboratory (ORNL), the available port dimensions, and antenna installation position of the LAPD. Compared to the original scheme, this antenna is also optimized in the design. It is found that the E field distribution of optimized antenna becomes even, and the maximum electric field decreases by approximately 14%. The current on the antenna box and FS is reduced after optimization, whereas the maximum J density decreases from 53.3 kA to 14.5 kA. The reflection performance of the port at 30 MHz is also improved after the structural optimization; The k_// spectrum distribution is sharper at the monopole phase (0, 0, 0, 0) and dipole phase (0, π, 0, π) and (0, 90, 270,180) than other phases. The optimized antenna can obtain a maximum |k_//| spectrum, which peaks about |k_//| = 30 m⁻¹ at the dipole phase (0, π, 0, π). The analysis results and assembly strategy can provide useful reference and guidance for the study of HHFW antenna design and fabrication in LAPD or other magnetic confined fusion devices.

中文翻译：

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LAPD高谐波快速波天线的设计与组装研究

TAE Technologies的仿真调查表明，高谐波快速波（HHFW）加热是对FRC等离子体进行核心电子加热的一种有前途的方法。这项研究主要根据橡树岭国家实验室（ORNL）进行的电磁仿真结果，可用端口尺寸以及LAPD的天线安装位置来描述HHFW天线的机械设计和组装。与原始方案相比，该天线在设计上也进行了优化。据发现，Ë优化天线的场分布变得均匀，并且最大电场由约14％降低。优化后，天线盒和FS上的电流减小，而最大J密度从53.3 kA降低到14.5 kA。结构优化后，端口在30 MHz处的反射性能也得到了改善。所述ķ _//光谱分布为单极相位（0，0，0，0）和偶极相位（0，更清晰的π，0，π）和（0，90，270180）比其他相。经过优化的天线可以获得最大 k _// | 频谱，其峰值约为| k _// | = 30 m ^-1在偶极相位（0，π，0，π）。分析结果和组装策略可为研究LAPD或其他磁约束聚变设备中的HHFW天线的设计和制造提供有用的参考和指导。