【作者】 汪宝亮；

【导师】 娄平； 侯汩；

【作者基本信息】 安徽大学 ， 理论物理， 2004， 硕士

【摘要】 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。这样才有利于耦合进最大的功率。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。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。在第三部分中，用数值模拟的方法模拟了多个加速结构，三个加速腔的结构分别用了HFSS和MAFIA来模拟并进行了比较，四个加速腔与八个加速腔的结构用HFSS来模拟并与用网络分析仪测试同结构的实验腔的结果进行了比较。最后，本文提出了用HFSS数值模拟的方法来设计加速结构的耦合腔，并给出了数值模拟设计的过程与结果。更多还原

【Abstract】 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. 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.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. We use HFSS code to simulate a four-cavity and eight-cavity accelerator structure.The results are compared with the tesing results of the network analytical apparatus.Finally, we present the numerical calculation of HFSS code to design accelerator coupler cavity and we give out the whole processes and results.更多还原