SAWTOOTH STABILIZATION BY LOCALIZED ELECTRON-CYCLOTRON HEATING IN A TOKAMAK PLASMA

被引：33

作者：

HANADA, K ^{[1
]}

TANAKA, H ^{[1
]}

IIDA, M ^{[1
]}

IDE, S ^{[1
]}

MINAMI, T ^{[1
]}

NAKAMURA, M ^{[1
]}

MAEKAWA, T ^{[1
]}

TERUMICHI, Y ^{[1
]}

TANAKA, S ^{[1
]}

YAMADA, M ^{[1
]}

MANICKAM, J ^{[1
]}

WHITE, RB ^{[1
]}

机构：

[1] PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.66.1974

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Sawtooth oscillations (STO) in the Ohmically heated WT-3 tokamak are strongly modified or suppressed by localized electron-cyclotron-resonance heating (ECH) near the q = 1 surface, where q refers to the safety factor. The effect of ECH is much stronger when it is applied on the high-field side as compared to the low-field side. Complete suppression of STO is achieved for the duration of the ECH, in most cases, when it is applied on the high-field side of a low-density plasma, provided the ECH power exceeds a threshold value. STO stabilization is attributed to a modification of the current-density profile by hot electrons generated by ECH, which reduces the shear in the q = 1 region.

引用

页码：1974 / 1977

页数：4

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