Gyrokinetic simulations of entropy transfer in high ion temperature LHD plasmas

被引：1
|
作者：
Watanabe, T. H. [1 ,2 ]
Sugama, H. [1 ,2 ]
Nunami, M. [1 ,2 ]
Tanaka, K. [1 ]
Nakata, M. [3 ]
机构：
[1] Natl Inst Fus Sci, Toki, Gifu 5095292, Japan
[2] Grad Univ Adv Studies, Dept Fus Sci, Toki, Gifu 5095292, Japan
[3] Japan Atom Energy Agcy, Rokkasho 0393212, Japan
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2013年 / 55卷 / 01期
关键词：
ZONAL FLOWS;
D O I：
10.1088/0741-3335/55/1/014017
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Gyrokinetic simulations of the ion temperature gradient (ITG) turbulence in non-axisymmetric configurations modeled on the Large Helical Device (LHD) are performed with the entropy transfer analysis (Nakata et al 2012 Phys. Plasmas 19 022303). It is clarified that a fluctuation spectrum elongated in the radial wavenumber direction is formed in a neoclassically optimized field configuration with the inward-shifted magnetic axis position, where the zonal flows are more effectively generated than in the standard case. The strong interaction between zonal flows and turbulence causes the successive entropy transfer from low to high radial wavenumber space and the spectral broadening of ITG turbulence.
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页数：6
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