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

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【作者】 王尔东； 王芳； 张保澄； 野口修一； 渡边谦； 赵夔；

【Author】 WANG Er-Dong1 WANG Fang1;1) ZHANG Bao-Cheng1 S. Noguchi2 K. Watanabe2 ZHAO Kui1 1 (Institute of Heavy Ion Physics, Peking University, Beijing 100871, China) 2 (KEK: High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)

【机构】 Institute of Heavy Ion Physics,Peking University； KEK: High Energy Accelerator Research Organization；

【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.

【Abstract】 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；
【Key words】 HOM coupler； notch filter； stepped coaxial transmission line； stop band characteristics；
【基金】 National Natural Science Foundation of China (10276001)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2009年05期
  • 【分类号】TL503
  • 【下载频次】27
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