Internal transport barrier triggered by neoclassical transport in W7-AS

被引：89

作者：

Stroth, U ^{[1
]}

Itoh, K

Itoh, SI

Hartfuss, H

Laqua, H

机构：

[1] EURATOM Assoc, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

[2] CAU Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

[3] Natl Inst Fus Sci, Gifu 5095292, Japan

[4] Kyushu Univ, Kasuga, Fukuoka 8168580, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.86.5910

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The three-dimensional magnetic configuration of a stellarator offers two specific mechanisms for a transition to improved particle and energy confinement. One route goes through the so-called electron-root confinement regime, which leads to a reduction of neoclassical transport via strong radial electric fields. In this Letter evidence for a second route is presented. It opens due to the layer of a strongly varying radial electric field which is present in the transitional region from neoclassical electron to ion-root confinement. This type of improvement acts on turbulent transport.

引用

页码：5910 / 5913

页数：4

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