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Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator.

Authors :
T. Kobayashi
U. Losada
B. Liu
T. Estrada
B.Ph. van Milligen
R. GerrĂº
M. Sasaki
C. Hidalgo
Source :
Nuclear Fusion; Apr2019, Vol. 59 Issue 4, p1-1, 1p
Publication Year :
2019

Abstract

In this letter, we investigate the spatial structure of a low frequency global potential oscillation, which is likely ascribed as the low frequency zonal flows, in TJ-II laboratory plasmas. In two plasmas produced by different heating schemes (electron cyclotron resonance heating and neutral beam injection heating) and characterized by different mean radial electric field structures, frequency-space-decomposed spectra of the global potential oscillation are obtained. In both cases, the oscillatory field has a single-peaked potential structure and a dipole radial electric field structure. The oscillating structure depends on its frequency as well as on the heating scheme. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00295515
Volume :
59
Issue :
4
Database :
Complementary Index
Journal :
Nuclear Fusion
Publication Type :
Academic Journal
Accession number :
135369930
Full Text :
https://doi.org/10.1088/1741-4326/ab0122