Negative Ion Plasmas

负离子等离子体

• 批准号: 63460219
• 负责人: SATO Noriyoshi
• 金额: $ 4.8万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460219/
• 关键词: Negative ion Plasmas; Plasma Physics; 負イオン; プラズマ; 物性

Negative ion plasmas have new features in plasma physics and its applications, which are to be investigated from both theoretical and experimental points of view. Here our recent experiments on negative ion plasmas are presented, including a brief review of the previous experiments. In our experiments, negative ion plasmas are produced by introducing a small amount of SF6 gas into a single-ended Q-machine plasma. The density ratio of negative (SF_6^-) to positive (K^+) ions, n_-/n_+, is controlled continuously in the range up to 0.9999. Our main interests are in effects of an existence of negative ions on characteristics of typical plasma waves and instabilities, i.e., electron plasma waves, ion waves, electrostatic ion cyclotron wave instability, and drift wave instability in negative ion plasmas. Their properties observed are consistent with theoretical predictions. It is also shown that some of these waves and instabilities are quite useful in determining the ratio n_-/n_+, especially in case of (n_+-n_-/n_+<< 1.

负离子等离子体在等离子体物理及其应用中具有新的特点，需要从理论和实验两个方面加以研究。本文介绍了我们最近的负离子等离子体实验，包括对以前实验的简要回顾。在我们的实验中，负离子等离子体是通过引入少量的SF6气体到单端Q机等离子体中产生的。负离子（SF_6^-）与正离子（K^+）的密度比n_-/n_+连续控制在0.9999的范围内。我们的主要兴趣是负离子的存在对典型等离子体波和不稳定性的影响，即，电子等离子体波、离子波、静电离子回旋波不稳定性和负离子等离子体中的漂移波不稳定性。观察到的性质与理论预测一致。文中还指出，某些波和不稳定性对确定n-/n+，特别是（n +-n-/n +<< 1）的情况是十分有用的。

项目成果

N.Sato: "Potential Formation in a High-Speed Plasma Flow along converging Magnetic Field Sines" Physical Reviero Setters. 61. 1615-1618 (1988)

N.Sato：“沿会聚磁场正弦的高速等离子流中的潜在形成”物理 Reviero Setters。

N.Sato: "Negative Ion Plasmas" Proc.of 1989 International Conf.on Plasma Phys.,New Delhi(Invited),(to be pulbished).

N.Sato：“负离子等离子体”Proc.of 1989 International Conf.on Plasma Phys.，新德里（特邀），（待出版）。

N.Sato: "Potential Formation in a HighーSpeed Plasma Flow along converging Hagnetic Field Sines" Peuysical Review Letters. 61. 1615-1618 (1988)

N.Sato：“沿会聚磁场正弦的高速等离子流中的潜在形成”Peuysical Review Letters 61. 1615-1618 (1988)。

N.Sato: "Negative Ion Plasma" Proc.of 1989 International Conf.on Plasma Phys.,New Delhi(Invited).

N.Sato：“负离子等离子体”Proc.of 1989 International Conf.on Plasma Phys.，新德里（特邀）。

N. Sato, Y. Watanabe, R. Hatakeyama, and T. Mieno: "Potential Formation in a High-Speed Plasma Flow along Converging Magnetic Field Lines" Physical Review Letters, Vol.61, No.14, 1615-1618, 1988.

N. Sato、Y. Watanabe、R. Hatakeyama 和 T. Mieno：“沿着会聚磁力线的高速等离子体流中的潜在形成”物理评论快报，第 61 卷，第 14 期，1615-1618，1988 年