Impact of helium neutral gas puff on plasma turbulence in linear magnetized argon plasmas

T. Kobayashi; F. Kin; Y. Kawachi; M. Sasaki; Y. Kosuga; K. Yamasaki; S. Inagaki

doi:10.1063/5.0007899

Impact of helium neutral gas puff on plasma turbulence in linear magnetized argon plasmas

T. Kobayashi, F. Kin, Y. Kawachi, M. Sasaki, Y. Kosuga, K. Yamasaki, S. Inagaki

Division of Nuclear Fusion Dynamics

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

3 Citations (Scopus)

Abstract

In order to explore the impact of the neutrals on the plasma turbulence, a new gas puff system is developed for a linear magnetized plasma column PANTA. Helium gas is injected into the argon plasma without changing the electron density profile. After the helium gas puff, the dominant fluctuation mode changes from the broadband m = 2 drift wave to the coherent m = 1 mode, where m is the azimuthal mode number. Accordingly, the property of the nonlinear coupling with other fluctuating modes changes from broadband couplings to coherent couplings.

Original language	English
Article number	062309
Journal	Physics of Plasmas
Volume	27
Issue number	6
DOIs	https://doi.org/10.1063/5.0007899
Publication status	Published - Jun 1 2020

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/5.0007899

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title = "Impact of helium neutral gas puff on plasma turbulence in linear magnetized argon plasmas",

abstract = "In order to explore the impact of the neutrals on the plasma turbulence, a new gas puff system is developed for a linear magnetized plasma column PANTA. Helium gas is injected into the argon plasma without changing the electron density profile. After the helium gas puff, the dominant fluctuation mode changes from the broadband m = 2 drift wave to the coherent m = 1 mode, where m is the azimuthal mode number. Accordingly, the property of the nonlinear coupling with other fluctuating modes changes from broadband couplings to coherent couplings.",

author = "T. Kobayashi and F. Kin and Y. Kawachi and M. Sasaki and Y. Kosuga and K. Yamasaki and S. Inagaki",

note = "Funding Information: We acknowledge the useful discussions with D. Kato and H. Tanuma, and thank S. Sakakibara and A. Fujisawa for the strong support. This work was partly supported by the Grant-in-Aid for Scientific Research of JSPS (Nos. 15H02155 and 17K14898), and the collaboration programs of RIAM of Kyushu University and Asada Science Foundation. Publisher Copyright: {\textcopyright} 2020 Author(s).",

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T1 - Impact of helium neutral gas puff on plasma turbulence in linear magnetized argon plasmas

AU - Kobayashi, T.

AU - Kin, F.

AU - Kawachi, Y.

AU - Sasaki, M.

AU - Kosuga, Y.

AU - Yamasaki, K.

AU - Inagaki, S.

N1 - Funding Information: We acknowledge the useful discussions with D. Kato and H. Tanuma, and thank S. Sakakibara and A. Fujisawa for the strong support. This work was partly supported by the Grant-in-Aid for Scientific Research of JSPS (Nos. 15H02155 and 17K14898), and the collaboration programs of RIAM of Kyushu University and Asada Science Foundation. Publisher Copyright: © 2020 Author(s).

PY - 2020/6/1

Y1 - 2020/6/1

N2 - In order to explore the impact of the neutrals on the plasma turbulence, a new gas puff system is developed for a linear magnetized plasma column PANTA. Helium gas is injected into the argon plasma without changing the electron density profile. After the helium gas puff, the dominant fluctuation mode changes from the broadband m = 2 drift wave to the coherent m = 1 mode, where m is the azimuthal mode number. Accordingly, the property of the nonlinear coupling with other fluctuating modes changes from broadband couplings to coherent couplings.

AB - In order to explore the impact of the neutrals on the plasma turbulence, a new gas puff system is developed for a linear magnetized plasma column PANTA. Helium gas is injected into the argon plasma without changing the electron density profile. After the helium gas puff, the dominant fluctuation mode changes from the broadband m = 2 drift wave to the coherent m = 1 mode, where m is the azimuthal mode number. Accordingly, the property of the nonlinear coupling with other fluctuating modes changes from broadband couplings to coherent couplings.

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Impact of helium neutral gas puff on plasma turbulence in linear magnetized argon plasmas

Abstract

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