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

• Kobayashi, Tatsuya

• Losada, U.

• Liu, B.

• Esreada, T.

• Milligen, B.Ph. van

• Gerru, R.

• Sasaki, Makoto

• Hidalgo, C.

抄録

0000-0001-5669-1937

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.

収録刊行物

• Nuclear Fusion

  Nuclear Fusion 59 (4), 044006-, 2019-03-05

  IOP Publishing

キーワード

• zonal flows
• plasma turbulence
• radial electric field

詳細情報

• CRID: 1050290473053665920
• NII論文ID: 120007176978
• NII書誌ID: AA00759871
• ISSN: 00295515
• ISSN: 17414326
• DOI: 10.1088/1741-4326/ab0122
• HANDLE: 10655/00012749
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/10772
• Web Site: http://iopscience.iop.org/article/10.1088/1741-4326/ab0122
• Web Site: http://iopscience.iop.org/article/10.1088/1741-4326/ab0122/pdf
• Web Site: http://stacks.iop.org/0029-5515/59/i=4/a=044006/pdf
• Web Site: http://stacks.iop.org/0029-5515/59/i=4/a=044006?key=crossref.b614ed381c0276dfdef3e90404515033
• 本文言語コード: en
• 資料種別: journal article
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