Experimental determination of critical threshold in electron transport on Tore Supra

被引：112

作者：

Hoang, GT ^{[1
]}

Bourdelle, C

Garbet, X

Giruzzi, G

Aniel, T

Ottaviani, M

Horton, W

Zhu, P

Budny, RV

机构：

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

[2] Univ Texas, Inst Fus Studies, Austin, TX 78712 USA

[3] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.87.125001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In Tore Supra plasmas with fast wave electron heating, a critical threshold in the electron temperature gradient (delT(e)) is clearly observed, i.e., a finite value of delT(e) for which the turbulent heat diffusivity vanishes. The radial profile of this critical gradient is experimentally determined from a set of discharges characterized by similar plasma parameters with fast wave powers ranging from 0.75 to 7.4 MW. The dependence of the electron heat flux on the gradient length is found to be offset linearly. The offset term increases linearly with the ratio of the local magnetic shear to the safety factor.

引用

页数：4

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