Density fluctuations in JIPP T-IIU tokamak plasmas measured by a heavy ion beam probe

Y. Hamada, A. Nishizawa, Y. Kawasumi, akihide fujisawa, K. Narihara, K. Ida, A. Ejiri, S. Ohdachi, K. Kawahata, K. Toi, K. Sato, T. Seki, H. Iguchi, K. Adachi, S. Hidekuma, S. Hirokura, K. Iwasaki, T. Ido, M. Kojima, J. KoongR. Kumazawa, H. Kuramoto, T. Minami, I. Nomura, H. Sakakita, M. Sasao, K. N. Sato, T. Tsuzuki, J. Xu, I. Yamada, T. Watari

研究成果: ジャーナルへの寄稿記事

13 引用 (Scopus)

抄録

Multiple and small sample volume measurements of the density turbulence and potential profile measurements in tokamak plasmas were conducted using a heavy ion beam probe. The obtained wavenumber-frequency spectrum S(k,ω) shows that the cross-sections of neutral beam injection (NBI) heated plasmas are divided into three regions of different turbulence characteristics. Outside the layer where the direction of the density turbulence propagation reverses, a low frequency and low wavenumber mode travelling in the ion diamagnetic drift direction dominates. The region enclosed by this reversal layer is divided into two parts during nearly perpendicular NBI heating: a region where the propagation velocity is near the Er/Bt poloidal rotation velocity and a bad curvature region of very small wavenumber and high propagation velocity. The region of high propagation velocity, found in NBI plasmas, disappears in the ohmic plasmas. In addition, a small component that propagates in the ion diamagnetic drift direction is observed in NBI plasmas.

元の言語英語
ページ(範囲)999-1014
ページ数16
ジャーナルNuclear Fusion
37
発行部数7
DOI
出版物ステータス出版済み - 7 1 1997
外部発表Yes

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beam injection
neutral beams
heavy ions
ion beams
propagation velocity
probes
turbulence
ions
curvature
low frequencies
heating
propagation
cross sections
profiles

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

これを引用

Hamada, Y., Nishizawa, A., Kawasumi, Y., fujisawa, A., Narihara, K., Ida, K., ... Watari, T. (1997). Density fluctuations in JIPP T-IIU tokamak plasmas measured by a heavy ion beam probe. Nuclear Fusion, 37(7), 999-1014. https://doi.org/10.1088/0029-5515/37/7/I08

Density fluctuations in JIPP T-IIU tokamak plasmas measured by a heavy ion beam probe. / Hamada, Y.; Nishizawa, A.; Kawasumi, Y.; fujisawa, akihide; Narihara, K.; Ida, K.; Ejiri, A.; Ohdachi, S.; Kawahata, K.; Toi, K.; Sato, K.; Seki, T.; Iguchi, H.; Adachi, K.; Hidekuma, S.; Hirokura, S.; Iwasaki, K.; Ido, T.; Kojima, M.; Koong, J.; Kumazawa, R.; Kuramoto, H.; Minami, T.; Nomura, I.; Sakakita, H.; Sasao, M.; Sato, K. N.; Tsuzuki, T.; Xu, J.; Yamada, I.; Watari, T.

:: Nuclear Fusion, 巻 37, 番号 7, 01.07.1997, p. 999-1014.

研究成果: ジャーナルへの寄稿記事

Hamada, Y, Nishizawa, A, Kawasumi, Y, fujisawa, A, Narihara, K, Ida, K, Ejiri, A, Ohdachi, S, Kawahata, K, Toi, K, Sato, K, Seki, T, Iguchi, H, Adachi, K, Hidekuma, S, Hirokura, S, Iwasaki, K, Ido, T, Kojima, M, Koong, J, Kumazawa, R, Kuramoto, H, Minami, T, Nomura, I, Sakakita, H, Sasao, M, Sato, KN, Tsuzuki, T, Xu, J, Yamada, I & Watari, T 1997, 'Density fluctuations in JIPP T-IIU tokamak plasmas measured by a heavy ion beam probe', Nuclear Fusion, 巻. 37, 番号 7, pp. 999-1014. https://doi.org/10.1088/0029-5515/37/7/I08
Hamada, Y. ; Nishizawa, A. ; Kawasumi, Y. ; fujisawa, akihide ; Narihara, K. ; Ida, K. ; Ejiri, A. ; Ohdachi, S. ; Kawahata, K. ; Toi, K. ; Sato, K. ; Seki, T. ; Iguchi, H. ; Adachi, K. ; Hidekuma, S. ; Hirokura, S. ; Iwasaki, K. ; Ido, T. ; Kojima, M. ; Koong, J. ; Kumazawa, R. ; Kuramoto, H. ; Minami, T. ; Nomura, I. ; Sakakita, H. ; Sasao, M. ; Sato, K. N. ; Tsuzuki, T. ; Xu, J. ; Yamada, I. ; Watari, T. / Density fluctuations in JIPP T-IIU tokamak plasmas measured by a heavy ion beam probe. :: Nuclear Fusion. 1997 ; 巻 37, 番号 7. pp. 999-1014.
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abstract = "Multiple and small sample volume measurements of the density turbulence and potential profile measurements in tokamak plasmas were conducted using a heavy ion beam probe. The obtained wavenumber-frequency spectrum S(k,ω) shows that the cross-sections of neutral beam injection (NBI) heated plasmas are divided into three regions of different turbulence characteristics. Outside the layer where the direction of the density turbulence propagation reverses, a low frequency and low wavenumber mode travelling in the ion diamagnetic drift direction dominates. The region enclosed by this reversal layer is divided into two parts during nearly perpendicular NBI heating: a region where the propagation velocity is near the Er/Bt poloidal rotation velocity and a bad curvature region of very small wavenumber and high propagation velocity. The region of high propagation velocity, found in NBI plasmas, disappears in the ohmic plasmas. In addition, a small component that propagates in the ion diamagnetic drift direction is observed in NBI plasmas.",
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AU - Hamada, Y.

AU - Nishizawa, A.

AU - Kawasumi, Y.

AU - fujisawa, akihide

AU - Narihara, K.

AU - Ida, K.

AU - Ejiri, A.

AU - Ohdachi, S.

AU - Kawahata, K.

AU - Toi, K.

AU - Sato, K.

AU - Seki, T.

AU - Iguchi, H.

AU - Adachi, K.

AU - Hidekuma, S.

AU - Hirokura, S.

AU - Iwasaki, K.

AU - Ido, T.

AU - Kojima, M.

AU - Koong, J.

AU - Kumazawa, R.

AU - Kuramoto, H.

AU - Minami, T.

AU - Nomura, I.

AU - Sakakita, H.

AU - Sasao, M.

AU - Sato, K. N.

AU - Tsuzuki, T.

AU - Xu, J.

AU - Yamada, I.

AU - Watari, T.

PY - 1997/7/1

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N2 - Multiple and small sample volume measurements of the density turbulence and potential profile measurements in tokamak plasmas were conducted using a heavy ion beam probe. The obtained wavenumber-frequency spectrum S(k,ω) shows that the cross-sections of neutral beam injection (NBI) heated plasmas are divided into three regions of different turbulence characteristics. Outside the layer where the direction of the density turbulence propagation reverses, a low frequency and low wavenumber mode travelling in the ion diamagnetic drift direction dominates. The region enclosed by this reversal layer is divided into two parts during nearly perpendicular NBI heating: a region where the propagation velocity is near the Er/Bt poloidal rotation velocity and a bad curvature region of very small wavenumber and high propagation velocity. The region of high propagation velocity, found in NBI plasmas, disappears in the ohmic plasmas. In addition, a small component that propagates in the ion diamagnetic drift direction is observed in NBI plasmas.

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