Edge plasma density convection during ion cyclotron resonance heating on Tore Supra

被引：81

作者：

Bécoulet, M ^{[1
]}

Colas, L ^{[1
]}

Pécoul, S ^{[1
]}

Gunn, J ^{[1
]}

Ghendrih, P ^{[1
]}

Bécoulet, A ^{[1
]}

Heuraux, S ^{[1
]}

机构：

[1] CEA Cadarache, Assoc Auratom CEA Fus Controlee, F-13108 St Paul Les Durance, France

来源：

PHYSICS OF PLASMAS | 2002年 / 9卷 / 06期

关键词：

D O I：

10.1063/1.1472501

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：

The two-dimensional (2D) edge plasma density distribution in the scrape off layer magnetically connected to the ion cyclotron resonance heating (ICRH) antennae is studied experimentally and numerically in the tokamak Tore Supra. A local density decrease in front of the loaded ICRH antenna ("pump-out" effect) is demonstrated by Langmuir probe measurements in a low recycling regime. An up-down asymmetry in the heat-flux and in the antenna erosion is also observed, and is associated with poloidal variations of the local density. These density redistributions are ascribed to an ExB convection process linked with rf sheaths. To assess this interpretation, the 2D transport code CELLS for modeling the density distribution near an ICRH antenna was developed and described in this paper. The code takes into account perpendicular diffusion, parallel transport and convection in rf-sheath-driven potentials. The strong density differences obtained in simulations reproduce up-down asymmetries of the heat fluxes. (C) 2002 American Institute of Physics.

引用

页码：2619 / 2632

页数：14

共 30 条

[1]

AGARICI G, COMMUNICATION

[2]

ARTEMENKOV LI, 1988, P 15 EPS C CONTR F B, V12, P702

[3] ENERGY MEASUREMENT OF FAST IONS TRAPPED IN THE TOROIDAL FIELD RIPPLE OF TORE-SUPRA [J].

BASIUK, V ;

BECOULET, A ;

HUTTER, T ;

MARTIN, G ;

PECQUET, AL ;

SAOUTIC, B .

FUSION TECHNOLOGY, 1994, 26 (03) :222-226

[4]

BECOULET A, 1999, P 17 IAEA C YOK JAP, V1, P83

[5] THE MODIFICATION OF THE PLASMA EDGE AND IMPURITY PRODUCTION BY ANTENNA PHASING DURING ICRF HEATING ON JET [J].

BURES, M ;

BRINKSCHULTE, H ;

JACQUINOT, J ;

LAWSON, KD ;

KAYE, A ;

TAGLE, JA .

PLASMA PHYSICS AND CONTROLLED FUSION, 1988, 30 (02) :149-167

[6]

Colas L, 1999, AIP CONF PROC, V485, P128, DOI 10.1063/1.59762

[7]

COLAS L, 2000, P 27 EUR PHYS SOC B, V24, P792

[8] EXCITATION OF GLOBAL MODES IN TEXTOR AND COMPARISON WITH THEORY [J].

DESCAMPS, P ;

KOCH, R ;

VANNIEUWENHOVE, R ;

VANOOST, G ;

VANWASSENHOVE, G ;

DELVIGNE, T ;

MESSIAEN, AM ;

VANDENPLAS, PE ;

WEYNANTS, RR .

PLASMA PHYSICS AND CONTROLLED FUSION, 1991, 33 (10) :1109-1133

[9]

DIPPOLITO D, 1995, P 11 TOP RF C PALM S, P467

[10] RADIO-FREQUENCY-SHEATH-DRIVEN EDGE PLASMA CONVECTION AND INTERACTION WITH THE H-MODE [J].

DIPPOLITO, DA ;

MYRA, JR ;

JACQUINOT, J ;

BURES, M .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1993, 5 (10) :3603-3617

← 1 2 3 →