Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Conceptual design and analysis of remote steering system for CFETR ECRH system

  • Chao Zhang (College of Physics and Optoelectronic Engineering, Shenzhen University) ;
  • Xiaojie Wang (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Dajun Wu (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Yunying Tang (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Hanlin Wang (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Dingzhen Li (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Fukun Liu (Institute of Plasma Physics, Chinese Academy of Sciences) ;
  • Muquan Wu (College of Physics and Optoelectronic Engineering, Shenzhen University) ;
  • Peiguang Yan (College of Physics and Optoelectronic Engineering, Shenzhen University) ;
  • Xiang Gao (College of Physics and Optoelectronic Engineering, Shenzhen University) ;
  • Jiangang Li (College of Physics and Optoelectronic Engineering, Shenzhen University)
  • Received : 2023.05.23
  • Accepted : 2023.10.16
  • Published : 2024.02.25
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Abstract

In order to optimize the operational safety and reliability of the upper launcher for the CFETR ECRH system, a design of the launcher based on the remote steering concept is currently being carried out for comparison with the front steering equivalent. This paper presents the remote steering system's conceptual design and simulation analysis. A Square Corrugated Waveguide (SCW) of 65 × 65 mm has been designed with an optimized length of 9.35 m. By changing the relative length of the waveguide, the transmission efficiency of the SCW is optimized within the range of steering angles ±12°. Different error factors are investigated in detail, and corresponding acceptable error ranges are provided. Considering these error factors and ignoring ohmic losses and thermal effects, the relative transmission efficiency of the SCW is estimated to be >98 % within the steering angle range. A matching steering unit for the SCW is designed, which consists of an ellipsoidal focusing mirror and a steerable flat mirror. The detailed design of the steerable mirror motion trajectory is presented. Also, the influence of the possible beam incident errors caused by the steering unit on the transmission efficiency is analyzed in detail.

Keywords

Acknowledgement

This work has been supported by the Comprehensive Research Facility for Fusion Technology Program of China under Contract No. 2018-000052-73-01-001228, and the National Key R&D Program of China under Grant Nos. 2022YFE03070000, 2022YFE03070004.

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