充等离子体微波管的研究

【作者】 陈硕；

【导师】 谢文楷；

【作者基本信息】 电子科技大学 ， 物理电子学， 2002， 硕士

【摘要】 本文首先对填充等离子体微波管的理论和实验发展作了较系统的综述分析，在此基础上重点对等离子体辅助慢波振荡器（PASOTRON）的实验装置和实验结果做深入而细致的研究，并对PASOTRON模式变换器的数学模型进行了数值计算，优化设计了模式变换器的结构尺寸。具体主要有以下内容： 1、从等离子体—注—波互作用的理论综述分析填充等离子体对微波器件性能参数的影响，并具体分析等离子体加载耦合腔链行波管中混合模式的形成，通过加载等离子体耦合腔行波管的实验数据来证实此类器件的特点。 2、对PASOTRON系统的实验装置进行了设计与制作。尤其是对空心阴极等离子体电子枪、电子注自聚焦传输系统、填充等离子体慢波结构以及真空馈气系统等子系统进行分析、设计，参与制作和调试。 3、对PASOTRON的实验测试并对实验结果进行分析。对空心阴极等离子体电子枪的放电实验和传输聚束实验进行了重点研究，对实验结果的分析为以后进一步开展等离子体填充微波管的研究打下了很好的基础。同时还设计了单次脉冲微波的测试系统，为这个项目的进一步实验创造了条件。 4、设计了PASOTRON所用的一种新型圆波导TM₀₁—圆波导TE₁₁的宽带射频输出模式变换器。对模式变换器的数学模型进行数值计算，并得到了归一化阻抗、驻波系数和频率相关的曲线，同时根据数值计算的综合曲线优化了模式变换器各部分的结构尺寸。 我们是国内首先开展填充等离子微波器件实验研究的课题组，因而本论文得到的一些结果无论是对于PASOTRON的进一步研究工作，还是对于其它类型的填充等离子体微波器件的开发均有很重要的参考价值。更多还原

【Abstract】 This paper summary presents the development of the microwave devices with plasma-filled. Based on this issue, it is important studied in detail that the experimental apparatus and experimental results of the PASOTRON(Plasma Assisted Slow-wave Oscillator). And designed the mode converter from the results of the numerical calculation for the mathmatics model,and acquired the structure scale of the mode converter. This paper mainly has the following contents:1. Based on the interaction of the plasma,beam and wave, it is summary presents the performance parameters of the microwave devices filled with plasma. And analyse the formation of the hybrid mode in the chain of coupled cavity, it is confirm the performance of the type devices through the experimental results of the loaded plasma coupled cavity traveling wave tube.2. Designed and made the experimental apparatus of PASOTRON. Especially analysed and designed the plasma hollow-cathode electron gun,the electric-beam self-pinching and transmitting system,the slow wave structure filled with plasma,the vacuum and gas-feed system,and take part in the formation and debug.3. Taken part in the experimental and analysed the experiment results. Especially to studied the discharge experimental of the plasma hollow-cathode E-gun and the E-beam transmissin testing. The experimental results grounded researching and developing in the plasma-filled microwave devices. And designed the pluse microwave measure system for the next step of the project created useful condation.4. Designed a novel wideband TMoi - TEn circular waveguide RF mode converter. Calculate the mathmatics model of the mode converter, and acquired the relation of the normalized input impedance,normalized input reactance and input VSWR versus frquency. Optimized the structure scale of the modeconverter.Our subject project is develop the microwave devices filled with plasma in the first. So the results of this paper are valuable not only to the next resarch of the PASOTRON but also to the development of the other type plasma microwave devices.更多还原