Suppression of Trapped Energetic Ions Driven Resistive Interchange Modes with Electron Cyclotron Heating in a Helical Plasma

X. D. Du, K. Toi, S. Ohdachi, K. Y. Watanabe, H. Takahashi, Y. Yoshimura, M. Osakabe, R. Seki, T. Nicolas, H. Tsuchiya, K. Nagaoka, K. Ogawa, K. Tanaka, M. Isobe, M. Yokoyama, M. Yoshinuma, S. Kubo, S. Sakakibara, T. Bando, T. IdoT. Ozaki, Y. Suzuki, Y. Takemura

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Abstract

The resistive interchange mode destabilized by the resonant interaction with the trapped energetic ions is fully suppressed when the injected power of electron cyclotron heating exceeds a certain threshold. It is shown for the first time that the complete stabilization of the energetic-particle-driven mode without relaxing the energetic particle (EP) pressure gradient is possible by reducing the radial width of the eigenmodes δw, especially when δw narrows to a small enough value relative to the finite orbit width of EP.

Original languageEnglish
Article number125001
JournalPhysical Review Letters
Volume118
Issue number12
DOIs
Publication statusPublished - Mar 20 2017
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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