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<p>Electron cyclotron heating (ECH) is one of the auxiliary heating methods employed in many magnetically confined fusion devices. In the Large Helical Device (LHD), the ECH system - including high-power gyrotrons, transmission lines, and mirror antennas – has played an important role in improving plasma parameters and realizing a variety of plasma experiments. Highly efficient transmission lines capable of withstanding high-power microwaves are essential to deliver high-power microwaves emitted from gyrotrons. In addition, mirror antennas are important for ensuring that the ECH power is absorbed at the intended location. In this paper, the ECH transmission system, focusing on the associated components used in high-power microwave transmission lines and various mirror antennas prepared for the LHD experiment, is reviewed.</p>

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Review of High-Power Microwave Transmission System for ECH in LHD

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月6日

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  • Ryoma Yanai,
  • Shin Kubo,
  • Takashi Shimozuma,
  • Yasuo Yoshimura,
  • Masaki Nishiura,
  • Hiroe Igami,
  • Hiromi Takahashi,
  • Toru Ii Tsujimura,
  • Naoki Kenmochi,
  • Sakuji Kobayashi,
  • Satoshi Ito,
  • Yoshinori Mizuno,
  • Kota Okada,
  • Toshiki Takeuchi,
  • Hidenori Takubo

摘要

Electron cyclotron heating (ECH) is one of the auxiliary heating methods employed in many magnetically confined fusion devices. In the Large Helical Device (LHD), the ECH system - including high-power gyrotrons, transmission lines, and mirror antennas – has played an important role in improving plasma parameters and realizing a variety of plasma experiments. Highly efficient transmission lines capable of withstanding high-power microwaves are essential to deliver high-power microwaves emitted from gyrotrons. In addition, mirror antennas are important for ensuring that the ECH power is absorbed at the intended location. In this paper, the ECH transmission system, focusing on the associated components used in high-power microwave transmission lines and various mirror antennas prepared for the LHD experiment, is reviewed.