Self-sustained turbulence and H-mode confinement in toroidal plasmas

被引:17
作者
Itoh, SI
Itoh, K
Yagi, M
Fukuyama, A
机构
[1] NATL INST FUS SCI,NAGOYA,AICHI 46401,JAPAN
[2] OKAYAMA UNIV,SCH ENGN,OKAYAMA 700,JAPAN
关键词
D O I
10.1088/0741-3335/38/10/004
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
The method of self-sustained turbulence is applied to the tokamak plasma, incorporating the effect of an inhomogeneous radial electric field. The transport coefficient is derived, making a bridge between L- and H-phase plasmas. It is possible to construct a unified transport model of the L- and I-I-mode phases. The anomalous transport coefficients are obtained in a unified and explicit form in terms of profile parameters such as the plasma pressure gradient, the magnetic shear, the shear and curvature of the radial electric field. Strong reductions of the thermal conductivity, chi, the electron and ion viscosities, mu(e) and mu, and the turbulent level in the I-I-phase plasma are explained. Furthermore, an additional stability window due to E(r)' is discovered in the higher pressure-gradient regime. The anomalous ion viscosity determines Delta, the typical scale length or E(r). Self-consistent solutions of Delta and mu are discussed.
引用
收藏
页码:1743 / 1762
页数:20
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