Comparison between Full Wave and Ray-Tracing Calculations to Examine Scenarios for Electron Bernstein Wave Heating in LHD

• IGAMI Hiroe

  National Institute for Fusion Science

• FUKUYAMA Atsushi

  Department of Nuclear Engineering, Kyoto University

• IDEI Hiroshi

  Research Institute for Applied Mechanics, Kyushu University

• NAGASAKI Kazunobu

  Institute of Advanced Energy, Kyoto University

• GOTO Yuki

  Department of Energy Engineering and Science, Nagoya University

• KUBO Shin

  National Institute for Fusion Science

• SHIMOZUMA Takashi

  National Institute for Fusion Science

• YOSHIMURA Yasuo

  National Institute for Fusion Science

• TAKAHASHI Hiromi

  National Institute for Fusion Science

• TSUJIMURA Toru I.

  National Institute for Fusion Science

• MAKINO Ryohei

  National Institute for Fusion Science

Abstract

With the use of the density scale length and the magnetic field strength around the O-X mode conversion region in the LHD for 77 GHz EC waves, the full wave calculations by the TASK/WF2D code have been per formed. The wave patterns obtained by full wave calculation have been compared with the trajectories obtained by multi ray tracing calculations. For the X-mode and the O-mode reflected near each cutoff, wave patterns obtained by full wave calculations and trajectories obtained by multi ray-tracing correspond to each other well. On the contrary, trajectories of the rays restarted at the high field side of the evanescent region between the plasma and the left handed cutoffs do not cover fully the wave patterns after the O-X mode conversion obtained by full wave calculations. Improvement of the manner to restart the ray-tracing is required. This improvement can provide a more precise view of the propagation of the EBWs and may contribute to examining scenarios for electron Bernstein wave heating.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 11 (0), 2403098-2403098, 2016

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• electron cyclotron resonance heating
• electron Bernstein wave
• full wave calculation
• ray-tracing

Details

• CRID: 1390001205253238528
• NII Article ID: 130005395268
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.11.2403098
• ISSN: 18806821
• HANDLE: 10655/00013319
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11390
• Web Site: https://www.jstage.jst.go.jp/article/pfr/11/0/11_2403098/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed