On violation of local closure of transport relation in high-temperature magnetized plasmas

N. Kasuya, S. Sugita, S. Inagaki, K. Itoh, M. Yagi, S. I. Itoh

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Rapid propagation of heat modulation and a hysteresis in the gradient-flux relation are found in a global nonlinear simulation of drift-interchange mode turbulence in toroidal helical plasmas. A global mode is excited nonlinearly and induces the turbulence flux in a limited radial region. The nonlinear couplings take a finite temporal duration for redistributing the energy. The mode also has a seesaw effect: increase of the amplitude of the global mode, at the other radii, works to absorb the energy form microscopic modes to suppress the turbulence. Successive excitations of microscopic modes cause the accelerated propagation of change of the heat flux like turbulence spreading after the onset of modulation. Owing to these processes, the hysteresis appears in the gradient-flux relation, which is compared with experiments.

本文言語英語
論文番号110701
ジャーナルPhysics of Plasmas
21
11
DOI
出版ステータス出版済み - 11 1 2014

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学

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