Particle transport in low core turbulence Tore-Supra plasmas

被引：21

作者：

Guirlet, R. ^{[1
]}

Sirinelli, A. ^{[1
]}

Parisot, T. ^{[1
]}

Sabot, R. ^{[1
]}

Artaud, J. F. ^{[1
]}

Bourdelle, C. ^{[1
]}

Garbet, X. ^{[1
]}

Hennequin, P. ^{[2
]}

Hoang, G. T. ^{[1
]}

Imbeaux, F. ^{[1
]}

Segui, J. L. ^{[1
]}

Mazon, D. ^{[1
]}

Villegas, D. ^{[1
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

[2] Ecole Polytech, CNRS, Lab Phys Plasmas, F-91128 Palaiseau, France

来源：

NUCLEAR FUSION | 2010年 / 50卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

NEOCLASSICAL TRANSPORT; IMPURITY TRANSPORT; MODE; PROFILE;

D O I：

10.1088/0029-5515/50/9/095009

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：

Electron and impurity transport has been studied in sawtoothing plasmas in the Tore-Supra tokamak. High time and space resolution measurements of the electron density reveal the existence of a flat profile region encompassing the q = 1 surface, on which is superimposed a density peak building up between sawtooth relaxations. For the first time in this regime, we have determined the underlying transport of both nickel and electrons independently of the effect of sawteeth in the central part of the plasma. Electron transport is consistent with the neoclassical expectations only in the close vicinity of the magnetic axis. Further out, it exceeds the neoclassical values as calculated with the NCLASS code, although the turbulence level is very low in the whole central region. In contrast, nickel transport is in good agreement with the neoclassical calculations in the same region. The neoclassical effect on trapped particles of a persisting mode due to incomplete reconnection of the magnetic surfaces is consistent with these observations.

引用

页数：9

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