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

T. Kobayashi; U. Losada; B. Liu; T. Estrada; B. Ph Van Milligen; R. Gerrú; M. Sasaki; C. Hidalgo

doi:10.1088/1741-4326/ab0122

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

T. Kobayashi, U. Losada, B. Liu, T. Estrada, B. Ph Van Milligen, R. Gerrú, M. Sasaki, C. Hidalgo

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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.

Original language	English
Article number	044006
Journal	Nuclear Fusion
Volume	59
Issue number	4
DOIs	https://doi.org/10.1088/1741-4326/ab0122
Publication status	Published - Mar 5 2019

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/1741-4326/ab0122

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title = "Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator",

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.",

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T1 - Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator

AU - Kobayashi, T.

AU - Losada, U.

AU - Liu, B.

AU - Estrada, T.

AU - Van Milligen, B. Ph

AU - Gerrú, R.

AU - Sasaki, M.

AU - Hidalgo, C.

PY - 2019/3/5

Y1 - 2019/3/5

N2 - 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.

AB - 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.

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

Abstract

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