Measurement of lower hybrid hot spots using a retarding field analyzer in Tore Supra

被引：30

作者：

Gunn, J. P. ^{[1
]}

Petrzilka, V. ^{[2
]}

Ekedahl, A. ^{[1
]}

Fuchs, V. ^{[2
]}

Gauthier, E. ^{[1
]}

Goniche, M. ^{[1
]}

Kocan, M. ^{[1
]}

Pascal, J. -Y. ^{[1
]}

Saint-Laurent, F. ^{[1
]}

机构：

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

[2] Assoc EURATOM CR, Prague 18200 8, Czech Republic

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

ELECTRONS; POWER;

D O I：

10.1016/j.jnucmat.2009.01.232

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A retarding field analyzer was used to provide direct measurements of the particle and power fluxes of suprathermal electrons in hot spots that are magnetically connected to the region in front of the waveguides of a lower hybrid antenna in Tore Supra. Hot spots can be divided into two regions according to the temporal evolution of the local suprathermal electron flux. Adjacent to each waveguide row is a layer of strong, dc current on which is superimposed strong fluctuations. Deeper into the plasma a second type of electron flux is identified: highly intermittent (similar to 10 kHz) bursts separated by brief periods of zero flux. Electron bursts occur at least up to 40-50 mm in front of the grill mouth. These observations contradict the standard theory that predicts that hot spots should be at most similar to 5 mm wide. (C) 2009 Elsevier B.V, All rights reserved.

引用

页码：904 / 906

页数：3

共 9 条

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