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, Makoto Sasaki, C. Hidalgo

Research output: Contribution to journalArticle

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 languageEnglish
Article number044006
JournalNuclear Fusion
Volume59
Issue number4
DOIs
Publication statusPublished - Mar 5 2019

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stellarators
low frequencies
oscillations
heating
electric fields
beam injection
neutral beams
electron cyclotron resonance
dipoles

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Kobayashi, T., Losada, U., Liu, B., Estrada, T., Van Milligen, B. P., Gerrú, R., ... Hidalgo, C. (2019). Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator. Nuclear Fusion, 59(4), [044006]. https://doi.org/10.1088/1741-4326/ab0122

Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator. / Kobayashi, T.; Losada, U.; Liu, B.; Estrada, T.; Van Milligen, B. Ph; Gerrú, R.; Sasaki, Makoto; Hidalgo, C.

In: Nuclear Fusion, Vol. 59, No. 4, 044006, 05.03.2019.

Research output: Contribution to journalArticle

Kobayashi, T. ; Losada, U. ; Liu, B. ; Estrada, T. ; Van Milligen, B. Ph ; Gerrú, R. ; Sasaki, Makoto ; Hidalgo, C. / Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator. In: Nuclear Fusion. 2019 ; Vol. 59, No. 4.
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AU - Sasaki, Makoto

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