The main work of this thesis is simulation of the thermal characteristic and cold - test characteristic for coupled - cavity twt slow - wave structure with ansys , which is a finite - element software . then the redevelopment upon this software was performed 本文的主要工作就是利用大型通用有限元计算软件ansys模拟耦合腔行波管慢波结构的热特性和冷测特性并对该软件进行了二次开发。
We use the way of cut - and - try . it involves a sequence of experiments to determine the matching and tuning . the effort can be time - consuming and requires substantial expertise empirical expertise . so it is important to find some new ways to design coupler cavity 以前，耦合腔的尺寸确定过程相当复杂，基本是按如下过程实现：通过以往经验先做出实验腔，进行测试，发现问题，再修正腔，再进行测试。这就很费时、费力、费钱。
We study the nonlinear plasma filled cerenkov maser and linear plasma f illed coupled cavity chain . the principal conclusions of this dissertation are given below : 1 . we study the nonlinear plasma grating filled dielectric cerenkov maser oscillator cavity for the first time 我们对非线性等离子体栅填充的介质cerenkov脉塞和线性等离子体填充的耦合腔链进行了研究，主要的研究成果和结论有：一、首次研究了非线性等离子体栅填充的介质cerenkov脉塞振荡器。
The non - linearity of measurement microphone in principle and structure at high pressure level analysed , and deeply introduces the high pressure level calibration system , the systems principle of operation , calibration method , measurement uncertainty and experimental results and deeply introduced 摘要从原理和结构上分析测试传声器在高声压级下的非线性特性，着重介绍以高压谐振耦合腔为核心的高声压级校准装置的原理、校准方法及不确定度分析，并给出一些试验结果。
In this paper , we study an alternative approach by numerical calculation . at first , we introduce the fundamental principles and the basic components of the electron linear . second , we introduce a way of coupler testing - - three frequency method . and present a example of coupler testing . third , we use numerical calculation method to simulate several accelerator structures . the hfss code and mafia code is used to simulate a three - cavity accelerator structure . the two results are compared 因此，寻找好的方法来设计加速结构耦合腔很重要。本文首先介绍了电子直线加速器的各相关基本理论和其基本组成部件。接着，介绍了现阶段耦合腔测试中常用的一种方法? ?三频法，并给出了测量加速器耦合腔的实例。
The couplers of accelerator structures are important components of electron knear . the efficient delivery of power from rf sources to accelerator structures depends crucially on the coupler cavity . the input coupler cavity is to be well matched , that is to say , it must have proper coupiing . and it must be tuned to the synchronous frequency . in this way , we can obtain the maximum power . in the past , the decision of the coupler cavity dimensions is very difficult 加速结构的输入耦合腔是电子直线加速器的重要组成部分。功率从功率源输送到加速管中，就依赖于输入耦合腔。输入耦合腔在整个结构中必须有良好的匹配即有恰当的耦合度，还必须工作在谐振频率。
