A model for electron transport barriers in tokamaks, tested against experimental data from RTP

被引：76

作者：

Hogeweij, GMD ^{[1
]}

Cardozo, NJL ^{[1
]}

De Baar, MR ^{[1
]}

Schilham, AMR ^{[1
]}

机构：

[1] EURATOM, FOM, Inst Plasmafys Rijnhuizen, Nieuwegein, Netherlands

来源：

NUCLEAR FUSION | 1998年 / 38卷 / 12期

关键词：

D O I：

10.1088/0029-5515/38/12/312

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：

Recent experiments in the RTP tokamak have shown that the electron temperature, T-e, profile in EC heated L mode discharges can have only a small number of distinct profile shapes, depending on the location of the additional heating. The sharp transitions between the profile shapes are associated with the loss or gain of a low rational q surface. These observations suggest that the electron thermal diffusivity chi(e) is a direct function of the safety factor q, with alternating layers of low and high chi(e). It is shown that such a model not only excellently describes the distinct profile shapes but also predicts other, observed but so far unexplained, phenomena, such as sharp off-axis maxima of T-e observed with off-axis heating at specific radii.

引用

页码：1881 / 1891

页数：11

共 36 条

[1]

Alikaev V. V., 1987, Soviet Journal of Plasma Physics, V13, P1

[2]

ARNOLD VI, 1993, GEOMETRICAL METHODS

[3] A high resolution multiposition Thomson scattering system for the Rijnhuizen Tokamak project [J].

Barth, CJ ;

Beurskens, MNA ;

Chu, CC ;

Donne, AJH ;

Cardozo, NJL ;

Herranz, J ;

vanderMeiden, HJ ;

Pijper, FJ .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (09) :3380-3392

[4]

BEURSKENS MNA, 1997, CONTROLLED FUSIO A 2, V21, P597

[5]

BEURSKENS MNA, UNPUB ERROR ANAL RTP

[6] Electron thermal transport in RTP: filaments, barriers and bifurcations [J].

Cardozo, NJL ;

Hogeweij, GMD ;

de Baar, M ;

Barth, CJ ;

Beurskens, MNA ;

De Luca, F ;

Donne, AJH ;

Galli, P ;

van Gelder, JFM ;

Gorini, G ;

de Groot, B ;

Jacchia, A ;

Karelse, FA ;

de Kloe, J ;

Kruijt, OG ;

Lok, J ;

Mantica, P ;

van der Meiden, HJ ;

Oomens, AAM ;

Oyevaar, T ;

Pijper, FJ ;

Polman, RW ;

Salzedas, F ;

Schuller, FC ;

Westerhof, E .

PLASMA PHYSICS AND CONTROLLED FUSION, 1997, 39 :B303-B316

[7] PLASMA FILAMENTATION IN THE RIJNHUIZEN-TOKAMAK RTP [J].

CARDOZO, NJL ;

SCHULLER, FC ;

BARTH, CJ ;

CHU, CC ;

PIJPER, FJ ;

LOK, J ;

OOMENS, AAM .

PHYSICAL REVIEW LETTERS, 1994, 73 (02) :256-259

[8] DIFFUSION ACROSS A LAYERED MEDIUM AND RELATION TO TRANSPORT IN THERMONUCLEAR PLASMAS [J].

CARDOZO, NJL ;

PETERS, M .

PHYSICS OF PLASMAS, 1995, 2 (11) :4230-4235

[9] Transport in tokamaks: Theoretical models and comparison with experimental results [J].

Connor, JW .

PLASMA PHYSICS AND CONTROLLED FUSION, 1995, 37 :A119-A133

[10] Electron thermal transport barrier and magnetohydrodynamic activity observed in Tokamak plasmas with negative central shear [J].

deBaar, MR ;

Hogeweij, GMD ;

Cardozo, NJL ;

Oomens, AAM ;

Schuller, FC .

PHYSICAL REVIEW LETTERS, 1997, 78 (24) :4573-4576

← 1 2 3 4 →