140GHz ECRH传输线关键器件研究
发布时间：2019-03-16 20:30
【摘要】：电子回旋共振加热(ECRH,Electron Cyclotron Resonance Heating)是一种极具吸引力的辅助加热方式,作为未来国际热核实验反应实验堆(ITER,International Thermonuclear Experimental Reactor)改变等离子体温度、密度及电流剖面,控制等离子体磁流体(MHD,Magnetohydrodynamics)不稳定性的首选方案,ECRH的实验研究是磁约束受控聚变研究的国际前沿课题之一。致力于解决兆瓦级长脉冲毫米波高效率传输的ECRH传输线技术的研究也日趋活跃,而高功率毫米波功率以及极化特性的实时测量技术是其中的研究热点,开展相关研究可为电子回旋系统高效率运行以及微波注入模式的优化控制提供必备技术手段。本文将以140GHz传输线关键器件研究为研究课题,重点研究基于小孔耦合的功率监测弯头设计以及基于矢量衍射理论的高功率极化器设计,通过微波功率测量可以得到ECRH系统传输效率和微波源输入功率等参数,而为了控制微波的极化方向,需要对高功率极化器进行研究。本文的主要研究内容分为三部分:1.对ECRH传输线系统进行简要介绍,主要介绍传输线上换向波导弯头、波纹波导等组成部分,对传输线损耗及高斯基模与11HE模的耦合效率进行分析。2.对目前高功率毫米波功率测量的几种方法的优缺点进行分析,提出定向耦合器-毫米波功率计方式。简要介绍小孔耦合理论,对应用于140GHz ECRH传输线上的功率监测弯头进行结构设计和参数优化,从理论分析和软件模拟等方面进行研究,最终确定双孔耦合结构的各个参数,并对双孔耦合结构参数进行容差分析和弯头组装讨论。3.总结目前高功率极化器所采用的槽纹结构,提出采用余弦形槽纹结构。结合矢量衍射理论,通过软件编程对140GHz ECRH传输线上基于矢量衍射理论的高功率极化器进行槽纹结构设计和参数优化,确定可改变微波极化形式的圆极化器与线极化器结构参数,并分析槽纹形状畸变对极化器极化性能的影响,对槽纹结构参数进行容差分析和机械结构设计,最后对搭建微波极化参数低功率条件下的实验测量系统及波入射等离子体角度与极化特性之间的关系进行研究讨论。
[Abstract]:Electron cyclotron resonance heating (ECRH,Electron Cyclotron Resonance Heating) is an attractive auxiliary heating method used as a future international thermonuclear experimental reactor (ITER,International Thermonuclear Experimental Reactor) to change plasma temperature, density and current profile. The first choice for controlling the instability of plasma magnetofluid (MHD,Magnetohydrodynamics) is the experimental study of ECRH, which is one of the international frontiers in the study of controlled fusion with magnetic confinement. The research of ECRH transmission line is becoming more and more active, and the real-time measurement technology of high-power millimeter-wave power and polarization characteristics is one of the research hotspots, which is devoted to the high efficiency transmission of megawatt long pulse millimeter wave. The related research can provide the necessary technical means for the high efficiency operation of electron cyclotron system and the optimal control of microwave injection mode. This thesis will focus on the design of power monitoring elbows based on small hole coupling and the design of high power polarizer based on vector diffraction theory, which will focus on the research of key components of 140GHz transmission line. The transmission efficiency of the ECRH system and the input power of the microwave source can be obtained by measuring the microwave power. In order to control the polarization direction of the microwave, it is necessary to study the high power polarizer. The main research contents of this paper are divided into three parts: 1. This paper briefly introduces the ECRH transmission line system, mainly introduces the commutation waveguide elbows and corrugated waveguides on the transmission line, and analyzes the transmission line loss and the coupling efficiency between the Gaussian mode and the 11HE mode. 2. The advantages and disadvantages of several high power millimeter wave power measurement methods are analyzed and a directional coupler-millimeter wave power meter is proposed. The theory of small hole coupling is introduced briefly. The structure design and parameter optimization of power monitoring elbows applied to 140GHz ECRH transmission lines are carried out. The parameters of double hole coupling structures are finally determined from the aspects of theoretical analysis and software simulation. The tolerance analysis and elbow assembly of two-hole coupling structural parameters are carried out. 3. The grooved structure used in the high power polarizer is summarized, and the cosine groove structure is put forward. Combined with vector diffraction theory, the groove structure design and parameter optimization of high power polarizer based on vector diffraction theory on 140GHz ECRH transmission line are carried out by software programming, and the structural parameters of circular polarizer and linear polarizer which can change the polarization form of microwave are determined. The influence of groove shape distortion on polarization performance of polarizer is analyzed, and the tolerance analysis and mechanical structure design of groove structure parameters are carried out. Finally, the experimental measurement system with low power polarization parameters and the relationship between the angle of incident plasma and the polarization characteristics are studied and discussed.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN811
本文编号：2441935
[Abstract]:Electron cyclotron resonance heating (ECRH,Electron Cyclotron Resonance Heating) is an attractive auxiliary heating method used as a future international thermonuclear experimental reactor (ITER,International Thermonuclear Experimental Reactor) to change plasma temperature, density and current profile. The first choice for controlling the instability of plasma magnetofluid (MHD,Magnetohydrodynamics) is the experimental study of ECRH, which is one of the international frontiers in the study of controlled fusion with magnetic confinement. The research of ECRH transmission line is becoming more and more active, and the real-time measurement technology of high-power millimeter-wave power and polarization characteristics is one of the research hotspots, which is devoted to the high efficiency transmission of megawatt long pulse millimeter wave. The related research can provide the necessary technical means for the high efficiency operation of electron cyclotron system and the optimal control of microwave injection mode. This thesis will focus on the design of power monitoring elbows based on small hole coupling and the design of high power polarizer based on vector diffraction theory, which will focus on the research of key components of 140GHz transmission line. The transmission efficiency of the ECRH system and the input power of the microwave source can be obtained by measuring the microwave power. In order to control the polarization direction of the microwave, it is necessary to study the high power polarizer. The main research contents of this paper are divided into three parts: 1. This paper briefly introduces the ECRH transmission line system, mainly introduces the commutation waveguide elbows and corrugated waveguides on the transmission line, and analyzes the transmission line loss and the coupling efficiency between the Gaussian mode and the 11HE mode. 2. The advantages and disadvantages of several high power millimeter wave power measurement methods are analyzed and a directional coupler-millimeter wave power meter is proposed. The theory of small hole coupling is introduced briefly. The structure design and parameter optimization of power monitoring elbows applied to 140GHz ECRH transmission lines are carried out. The parameters of double hole coupling structures are finally determined from the aspects of theoretical analysis and software simulation. The tolerance analysis and elbow assembly of two-hole coupling structural parameters are carried out. 3. The grooved structure used in the high power polarizer is summarized, and the cosine groove structure is put forward. Combined with vector diffraction theory, the groove structure design and parameter optimization of high power polarizer based on vector diffraction theory on 140GHz ECRH transmission line are carried out by software programming, and the structural parameters of circular polarizer and linear polarizer which can change the polarization form of microwave are determined. The influence of groove shape distortion on polarization performance of polarizer is analyzed, and the tolerance analysis and mechanical structure design of groove structure parameters are carried out. Finally, the experimental measurement system with low power polarization parameters and the relationship between the angle of incident plasma and the polarization characteristics are studied and discussed.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN811
【参考文献】
相关期刊论文 前1条
1 王贺;陆志鸿;周俊;饶军;王超;;HL-2A装置ECRH系统传输效率的测量研究[J];核聚变与等离子体物理;2010年03期
，本文编号：2441935
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