Development of fundamental power coupler for C-ADS superconducting elliptical cavities

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Kui-Xiang Gu, Feng Bing, Wei-Min Pan, Tong-Ming Huang, Qiang Ma and Fan-Bo Meng. Development of fundamental power coupler for C-ADS superconducting elliptical cavities[J]. Chinese Physics C, 2017, 41(6): 067001. doi: 10.1088/1674-1137/41/6/067001
Kui-Xiang Gu, Feng Bing, Wei-Min Pan, Tong-Ming Huang, Qiang Ma and Fan-Bo Meng. Development of fundamental power coupler for C-ADS superconducting elliptical cavities[J]. Chinese Physics C, 2017, 41(6): 067001.  doi: 10.1088/1674-1137/41/6/067001 shu
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Received: 2016-12-01
Revised: 2017-01-23
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    Supported by China ADS Project (XDA03020000) and National Natural Science Foundation of China (11475203)}

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Development of fundamental power coupler for C-ADS superconducting elliptical cavities

    Corresponding author: Kui-Xiang Gu,
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by China ADS Project (XDA03020000) and National Natural Science Foundation of China (11475203)}

Abstract: 5-cell elliptical cavities have been selected for the main linac of the China Accelerator Driven sub-critical System (C-ADS) in the medium energy section. According to the design, each cavity should be driven with radio frequency (RF) energy up to 150 kW by a fundamental power coupler (FPC). As the cavities work with high quality factor and high accelerating gradient, the coupler should keep the cavity from contamination in the assembly procedure. To fulfil the requirements, a single-window coaxial type coupler was designed with the capabilities of handling high RF power, class 10 clean room assembly, and heat load control. This paper presents the coupler design and gives details of RF design, heat load optimization and thermal analysis as well as multipacting simulations. In addition, a primary high power test has been performed and is described in this paper.

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