Influence of Low-Order Rational Surfaces on the Radial Electric Field of TJ-II ECH Plasmas

被引：16

作者：

Bondarenko, O. ^{[1
]}

Estrada, T. ^{[1
]}

Jimenez-Gomez, R. ^{[1
]}

Lopez-Bruna, D. ^{[1
]}

Happel, T. ^{[1
]}

Romero, J. ^{[1
]}

Lopez-Fraguas, A. ^{[1
]}

Ascasibar, E. ^{[1
]}

Blanco, E. ^{[1
]}

机构：

[1] Asociac Euratom CIEMAT Fus, Lab Nacl Fus, Madrid, Spain

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2010年 / 50卷 / 6-7期

关键词：

Stellarators; rational surfaces; radial electric field; Doppler reflectometry; VELOCITY SHEAR-LAYER; MAGNETIC-SURFACES; TRANSPORT; REFLECTOMETRY; CONFINEMENT; ISLAND; CORE;

D O I：

10.1002/ctpp.200900026

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：

Dynamic magnetic configuration scan experiments have been conducted in order to investigate the influence of the rotational transform on plasma rotation, radial electric field and turbulence. The main magnetic resonances (7/4 and 5/3 in this work) make a positive contribution to the local radial electric field, which depends on the plasma density and plasma radius. A local reduction in the level of density fluctuations due to the influence of low order rational surfaces is also observed. These results could explain local transport changes associated to low order rational surfaces observed in TJ-II ECH plasmas. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：605 / 609

页数：5

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