Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system

Kenichi Nagaoka, Mitsutaka Isobe, Kazuo Toi, Akihiro Shimizu, Akihide Fujisawa, Shunsuke Ohshima, Haruhisa Nakano, Masaki Osakabe, Yasushi Todo, Tsuyoshi Akiyama, Yoshihiko Nagashima, Chihiro Suzuki, Shin Nishimura, Yasuo Yoshimura, Keisuke Matsuoka, Shoichi Okamura

Research output: Contribution to journalArticle

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Abstract

The internal behavior of fast ions interacting with magnetohydrodynamic bursts excited by energetic ions has been experimentally investigated in the compact helical system. The resonant convective oscillation of fast ions was identified inside the last closed-flux surface during an energetic-particle mode (EPM) burst. The phase difference between the fast-ion oscillation and the EPM, indicating the coupling strength between them, remains a certain value during the EPM burst and drives an anomalous transport of fast ions.

Original languageEnglish
Article number065005
JournalPhysical Review Letters
Volume100
Issue number6
DOIs
Publication statusPublished - Feb 15 2008

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energetic particles
bursts
ions
plasma oscillations
magnetohydrodynamics
oscillations

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system. / Nagaoka, Kenichi; Isobe, Mitsutaka; Toi, Kazuo; Shimizu, Akihiro; Fujisawa, Akihide; Ohshima, Shunsuke; Nakano, Haruhisa; Osakabe, Masaki; Todo, Yasushi; Akiyama, Tsuyoshi; Nagashima, Yoshihiko; Suzuki, Chihiro; Nishimura, Shin; Yoshimura, Yasuo; Matsuoka, Keisuke; Okamura, Shoichi.

In: Physical Review Letters, Vol. 100, No. 6, 065005, 15.02.2008.

Research output: Contribution to journalArticle

Nagaoka, K, Isobe, M, Toi, K, Shimizu, A, Fujisawa, A, Ohshima, S, Nakano, H, Osakabe, M, Todo, Y, Akiyama, T, Nagashima, Y, Suzuki, C, Nishimura, S, Yoshimura, Y, Matsuoka, K & Okamura, S 2008, 'Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system', Physical Review Letters, vol. 100, no. 6, 065005. https://doi.org/10.1103/PhysRevLett.100.065005
Nagaoka, Kenichi ; Isobe, Mitsutaka ; Toi, Kazuo ; Shimizu, Akihiro ; Fujisawa, Akihide ; Ohshima, Shunsuke ; Nakano, Haruhisa ; Osakabe, Masaki ; Todo, Yasushi ; Akiyama, Tsuyoshi ; Nagashima, Yoshihiko ; Suzuki, Chihiro ; Nishimura, Shin ; Yoshimura, Yasuo ; Matsuoka, Keisuke ; Okamura, Shoichi. / Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system. In: Physical Review Letters. 2008 ; Vol. 100, No. 6.
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AU - Shimizu, Akihiro

AU - Fujisawa, Akihide

AU - Ohshima, Shunsuke

AU - Nakano, Haruhisa

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AU - Todo, Yasushi

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AU - Suzuki, Chihiro

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AU - Okamura, Shoichi

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