H-mode power threshold and transition in ASDEX Upgrade

被引：104

作者：

Ryter, F ^{[1
]}

Suttrop, W

Brusehaber, B

Kaufmann, M

Mertens, V

Murmann, H

Peeters, AG

Stober, J

Schweinzer, J

Zohm, H

机构：

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

[2] Univ Stuttgart, Inst Plasmaforsch, D-70569 Stuttgart, Germany

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1998年 / 40卷 / 05期

关键词：

Electron transitions - Magnetic field effects - Plasma collision processes - Plasma confinement - Plasma density - Plasma theory - Thermal effects;

D O I：

10.1088/0741-3335/40/5/032

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：

Global and local H-mode threshold analyses are presented and discussed. The density window was extended up to the density limit towards which the power threshold exhibits a dramatic increase. First results with the new divertor are compared to the previous threshold scaling. Local edge measurements at the L-H transition show that the temperature decreases slightly with density and increases with magnetic field, and that the ion collisionality at the plasma edge is always clearly above unity, between 5 and 15. Experiments at high power threshold exhibit improved L-mode confinement and suggest that two mechanisms are required for the L-H transition.

引用

页码：725 / 729

页数：5