Electron thermal transport in RTP: filaments, barriers and bifurcations

被引：102

作者：

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

机构：

[1] EURATOM Assoc, FOM, FOM Inst Plasmafys Rijnhuizen, Trilateral Euregio Cluster, NL-3430 BE Nieuwegein, Netherlands

[2] Univ Studi Milano, Dipartimento Fis, Milan, Italy

[3] EURATOM Assoc, ENEA, CNR, Ist Fis Plasma, Milan, Italy

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1997年 / 39卷

关键词：

D O I：

10.1088/0741-3335/39/12B/023

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：

Experiments with strong localized electron cyclotron heating (ECH) in the RTP tokamak show that electron heat transport is governed by alternating layers of good and bad thermal conduction. For central deposition hot T-e filaments are observed inside the q = 1 radius. Moving the ECH resonance from the centre to the edge of the plasma results in discrete steps of the central electron temperature. The transitions occur when the minimum q value crosses q = 1, 2, 5/2 or 3, and correspond to the loss of a transport barrier situated close to the rational q value. Close to the transitions a new type of sawtooth activity is observed, characterized by the formation of sharp off-axis maxima on the T, profile, which collapse abruptly. The formation of the off-axis maxima is attributed to heat deposition precisely 'on top of' a transport barrier.

引用

页码：B303 / B316

页数：14

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