This article presents the development of a dual-state Ku-band gyrotron traveling-wave tube (gyro-TWT) dual-state curved-profile magnetic injection gun (MIG) generating high-quality electron beams, in which the pitch factor is up to 1.2 and 1.35 for the pulse wave (PW) state and the continuous wave (CW) state, separately. A multiobjective genetic algorithm (MOGA) is applied in the profile optimization. Meanwhile, the parametric sensitivity is also discussed in detail. A periodic dielectric-loaded interaction circuit is adopted to suppress oscillations. Furthermore, thermal analyses of the interaction circuit under different duty cycles are also elaborated. The interaction circuit is analyzed in accordance with the proposed nonlinear self-consistent theory and particle-in-cell (PIC) codes. The results of hot experiments show that the dual-state tube obtains the output power of 150/30 kW corresponding to a saturated gain of 40/41 dB and the maximum efficiency of 25%/21% within the bandwidth of 2.0/1.1 GHz for the PW/CW state, respectively.

中文翻译：

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Ku波段双态陀螺行波管研究


本文介绍了双态 Ku 波段回旋管行波管 (gyro-TWT) 双态曲面磁注入枪 (MIG) 的开发，可产生高质量电子束，其中节距因子高达1.2和1.35分别针对脉冲波(PW)状态和连续波(CW)状态。多目标遗传算法（MOGA）应用于轮廓优化。同时，还详细讨论了参数灵敏度。采用周期性电介质负载交互电路来抑制振荡。此外，还详细阐述了不同占空比下交互电路的热分析。根据所提出的非线性自洽理论和胞内粒子（PIC）代码对相互作用电路进行了分析。热实验结果表明，双态管在2.0/1.1 GHz带宽内获得150/30 kW的输出功率，对应40/41 dB的饱和增益，最高效率为25%/21%。分别为 PW/CW 状态。