THE PRESENT STATUS OF IMPURITY TRANSPORT INVESTIGATIONS

被引：18

作者：

SHIMADA, M

机构：

[1] Japan Atomic Energy Research Institute, Naka-gun, Ibaraki-ken, 311-01, Naka-machi

来源：

FUSION ENGINEERING AND DESIGN | 1992年 / 15卷 / 04期

关键词：

D O I：

10.1016/0920-3796(92)90018-Y

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The present status of impurity transport studies in tokamaks is reviewed. Ohmically heated and neutral-beam heated L-mode discharges exhibit anomalous impurity transport. The values of particle diffusivity range from 0.5 to 2 m2/s. With improved energy confinement such as in the H-mode the impurity transport is suppressed, which results in a radiation collapse of the H-mode state in the absence of the edge-localized mode (ELM). With high power neutral-beam heating, ELMs frequently expel particles and heat out of the separatrix surface, which results in long (approximately 5 seconds) quasi-stationary H-mode operation.

引用

页码：325 / 341

页数：17

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