Direct measurement of current filament structures in a magnetic-confinement fusion device

Turbulent structures detected in the edge plasma of fusion devices, often described as blobs, are generally believed to be responsible for confinement degradation. Recent experimental evidence and theories have suggested their filamentary electromagnetic nature. In this Letter the first direct exper...

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Bibliographic Details
Published in:	Physical review letters Vol. 102; no. 16; p. 165001
Main Authors:	Spolaore, M, Vianello, N, Agostini, M, Cavazzana, R, Martines, E, Scarin, P, Serianni, G, Spada, E, Zuin, M, Antoni, V
Format:	Journal Article
Language:	English
Published:	United States 24-04-2009
Subjects:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY CURRENT DENSITY MAGNETIC CONFINEMENT PERTURBATION THEORY PLASMA THERMONUCLEAR DEVICES
Online Access:	Get full text
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Summary:	Turbulent structures detected in the edge plasma of fusion devices, often described as blobs, are generally believed to be responsible for confinement degradation. Recent experimental evidence and theories have suggested their filamentary electromagnetic nature. In this Letter the first direct experimental measurements of the parallel current density associated with turbulent structures in a fusion experiment are reported. The electromagnetic nature of structures is clearly shown by identifying the current filaments with a vortexlike velocity pattern and the associated pressure perturbation.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.102.165001