Simulation of energetic particle driven geodesic acoustic modes and the energy channeling in the Large Helical Device plasmas

Hao Wang, Yasushi Todo, Masaki Oasakabe, Takeshi Ido, Yasuhiro Suzuki

研究成果: Contribution to journalArticle査読

9 被引用数 (Scopus)

抄録

Energetic particle driven geodesic acoustic modes (EGAMs) in Large Helical Device plasmas are investigated using MEGA code. MEGA is a hybrid simulation code for energetic particles interacting with a magneto-hydrodynamic (MHD) fluid and in the present work, both the energetic particles and bulk ions are described by the kinetic equations. The low frequency EGAMs are reproduced. Also, the energy transfer is analyzed and the bulk ion heating during the EGAM activity is observed. The ions obtain energy when the energetic particles lose energy, and this indicates that an energy channel is established by the EGAM. EGAM channeling is reproduced by simulation with realistic parameters for the first time. The heating power to bulk ions is 3.4 kW m-3. It is found that sideband resonance is dominant during the energy transfer from EGAM to the bulk ions, and the transit frequencies of resonant bulk ions are one-half of the EGAM frequency.

本文言語英語
論文番号096041
ジャーナルNuclear Fusion
59
9
DOI
出版ステータス出版済み - 8 5 2019
外部発表はい

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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