Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow

Y. Saitou; A. Yonesu; S. Shinohara; M. V. Ignatenko; N. Kasuya; M. Kawaguchi; K. Terasaka; T. Nishijima; Y. Nagashima; Y. Kawai; M. Yagi; S. I. Itoh; M. Azumi; K. Itoh

doi:10.1063/1.2743030

Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow

Y. Saitou, A. Yonesu, S. Shinohara, M. V. Ignatenko, N. Kasuya, M. Kawaguchi, K. Terasaka, T. Nishijima, Y. Nagashima, Y. Kawai, M. Yagi, S. I. Itoh, M. Azumi, K. Itoh

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Abstract

The importance of reducing the neutral density to reach strong drift wave turbulence is clarified from the results of the extended magnetohydrodynamics and Monte Carlo simulations in a linear magnetized plasma. An upper bound of the neutral density relating to the ion-neutral collision frequency for the excitation of drift wave instability is shown, and the necessary flow velocity to excite this instability is also estimated from the neutral distributions. Measurements of the Mach number and the electron density distributions using Mach probe in the large mirror device (LMD) of Kyushu University [S. Shinohara, Plasma Phys. Control. Fusion 37, 1015 (1995)] are reported as well. The obtained results show a controllability of the neutral density and provide the basis for neutral density reduction and a possibility to excite strong drift wave turbulence in the LMD.

Original language	English
Article number	072301
Journal	Physics of Plasmas
Volume	14
Issue number	7
DOIs	https://doi.org/10.1063/1.2743030
Publication status	Published - 2007

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.2743030

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Saitou, Y., Yonesu, A., Shinohara, S., Ignatenko, M. V., Kasuya, N., Kawaguchi, M., Terasaka, K., Nishijima, T., Nagashima, Y., Kawai, Y., Yagi, M., Itoh, S. I., Azumi, M., & Itoh, K. (2007). Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow. Physics of Plasmas, 14(7), Article 072301. https://doi.org/10.1063/1.2743030

Saitou, Y, Yonesu, A, Shinohara, S, Ignatenko, MV, Kasuya, N, Kawaguchi, M, Terasaka, K, Nishijima, T, Nagashima, Y, Kawai, Y, Yagi, M, Itoh, SI, Azumi, M & Itoh, K 2007, 'Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow', Physics of Plasmas, vol. 14, no. 7, 072301. https://doi.org/10.1063/1.2743030

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title = "Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow",

abstract = "The importance of reducing the neutral density to reach strong drift wave turbulence is clarified from the results of the extended magnetohydrodynamics and Monte Carlo simulations in a linear magnetized plasma. An upper bound of the neutral density relating to the ion-neutral collision frequency for the excitation of drift wave instability is shown, and the necessary flow velocity to excite this instability is also estimated from the neutral distributions. Measurements of the Mach number and the electron density distributions using Mach probe in the large mirror device (LMD) of Kyushu University [S. Shinohara, Plasma Phys. Control. Fusion 37, 1015 (1995)] are reported as well. The obtained results show a controllability of the neutral density and provide the basis for neutral density reduction and a possibility to excite strong drift wave turbulence in the LMD.",

author = "Y. Saitou and A. Yonesu and S. Shinohara and Ignatenko, {M. V.} and N. Kasuya and M. Kawaguchi and K. Terasaka and T. Nishijima and Y. Nagashima and Y. Kawai and M. Yagi and Itoh, {S. I.} and M. Azumi and K. Itoh",

note = "Funding Information: This work was partly supported by the Grant-in-Aid for Specially-Promoted Research (No. 16002005) of MEXT Japan, by the 4-2-4 program of Kyushu University, by the collaboration programmes of the Research Institute for Applied Mechanics of Kyushu University and of National Institute for Fusion Science (Nos. NIFS03KKMD001, NIFS06KDAD005, and NIFS05KQHP003). ",

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doi = "10.1063/1.2743030",

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AU - Saitou, Y.

AU - Yonesu, A.

AU - Shinohara, S.

AU - Ignatenko, M. V.

AU - Kasuya, N.

AU - Kawaguchi, M.

AU - Terasaka, K.

AU - Nishijima, T.

AU - Nagashima, Y.

AU - Kawai, Y.

AU - Yagi, M.

AU - Itoh, S. I.

AU - Azumi, M.

AU - Itoh, K.

N1 - Funding Information: This work was partly supported by the Grant-in-Aid for Specially-Promoted Research (No. 16002005) of MEXT Japan, by the 4-2-4 program of Kyushu University, by the collaboration programmes of the Research Institute for Applied Mechanics of Kyushu University and of National Institute for Fusion Science (Nos. NIFS03KKMD001, NIFS06KDAD005, and NIFS05KQHP003).

PY - 2007

Y1 - 2007

N2 - The importance of reducing the neutral density to reach strong drift wave turbulence is clarified from the results of the extended magnetohydrodynamics and Monte Carlo simulations in a linear magnetized plasma. An upper bound of the neutral density relating to the ion-neutral collision frequency for the excitation of drift wave instability is shown, and the necessary flow velocity to excite this instability is also estimated from the neutral distributions. Measurements of the Mach number and the electron density distributions using Mach probe in the large mirror device (LMD) of Kyushu University [S. Shinohara, Plasma Phys. Control. Fusion 37, 1015 (1995)] are reported as well. The obtained results show a controllability of the neutral density and provide the basis for neutral density reduction and a possibility to excite strong drift wave turbulence in the LMD.

AB - The importance of reducing the neutral density to reach strong drift wave turbulence is clarified from the results of the extended magnetohydrodynamics and Monte Carlo simulations in a linear magnetized plasma. An upper bound of the neutral density relating to the ion-neutral collision frequency for the excitation of drift wave instability is shown, and the necessary flow velocity to excite this instability is also estimated from the neutral distributions. Measurements of the Mach number and the electron density distributions using Mach probe in the large mirror device (LMD) of Kyushu University [S. Shinohara, Plasma Phys. Control. Fusion 37, 1015 (1995)] are reported as well. The obtained results show a controllability of the neutral density and provide the basis for neutral density reduction and a possibility to excite strong drift wave turbulence in the LMD.

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Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow

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