Stop band characteristics of a TESLA cavity coaxial-type HOM coupler  

作　　者：王尔东 王芳 张保澄 野口修一 渡边谦 赵夔 

机构地区：[1]Institute of Heavy Ion Physics,Peking University [2]KEK: High Energy Accelerator Research Organization

出　　处：《Chinese Physics C》2009年第5期401-405,共5页中国物理C（英文版）

基　　金：National Natural Science Foundation of China (10276001)

摘　　要：A TTF-type coaxial higher order modes （HOM） coupler has been used in a TESLA 9 cell cavity. It is impossible to measure the stop band characteristics of the HOM coupler with the cavity. A measurement device for the coaxial transmission line type for the HOM coupler has been designed at Peking University. Experimentally it was shown that the average voltage standing wave ratio of the coaxial transmission line is smaller than 1.08. The experimental results of the stop band characteristics of the TTF-type HOM coupler have been fitted for the simulation. This paper describes the design of the measurement device and discusses the experimental and simulation results of stop band characteristics of the HOM coupler.A TTF-type coaxial higher order modes （HOM） coupler has been used in a TESLA 9 cell cavity. It is impossible to measure the stop band characteristics of the HOM coupler with the cavity. A measurement device for the coaxial transmission line type for the HOM coupler has been designed at Peking University. Experimentally it was shown that the average voltage standing wave ratio of the coaxial transmission line is smaller than 1.08. The experimental results of the stop band characteristics of the TTF-type HOM coupler have been fitted for the simulation. This paper describes the design of the measurement device and discusses the experimental and simulation results of stop band characteristics of the HOM coupler.

关 键 词：HOM coupler notch filter stepped coaxial transmission line stop band characteristics 

分 类 号：TL503[核科学技术—核技术及应用]