Study of quiescent H-mode plasmas in ASDEX upgrade

被引：42

作者：

Suttrop, W ^{[1
]}

Conway, GD

Fattorini, L

Horton, LD

Kurki-Suonio, T

Maggi, CF

Maraschek, M

Meister, H

Neu, R

Pütterich, T

Reich, M

Sips, ACC

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85740 Garching, Germany

[2] Helsinki Univ Technol, EURATOM, TEKNES Assoc, FIN-02015 Helsinki, Finland

[3] EURATOM, IST, Ctr Fusao Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2004年 / 46卷

关键词：

D O I：

10.1088/0741-3335/46/5A/016

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：

In a recent campaign with counter-current neutral beam injection (NBI), the quiescent high confinement mode (QH-mode) is studied in ASDEX Upgrade. The QH-mode regime is obtained with all accessible NBI angles, with and without additional ion cyclotron heating, at,various values of edge safety factor q(95) and at values of Z(eff) down to 2.5 after fresh boronization. In contrast to the ELMy H-mode, the pedestal pressure depends significantly on radial heat flux in the QH-mode, giving rise to a reduced heating power degradation of H-mode confinement. The 'edge harmonic oscillation', a characteristic MHD feature of the QH-mode that replaces ELMS, occurs at rational surfaces in the H-mode barrier region, and has so far been found only with a toroidal mode number n = 1. These conditions seem to define windows in q(95) for favourable QH-mode access.

引用

页码：A151 / A156

页数：6

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