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.

负离子等离子体具有等离子体物理及其应用的新特征，这些特征将从理论和实验的观点均可研究。这里提出了我们最近关于负离子等离子体的实验，包括对先前实验的简要回顾。在我们的实验中，通过将少量的SF6气体引入单端Q-Machine等离子体中来产生负离子等离子体。负（SF_6^ - ）与阳性（K^+）离子N _-/n_+的密度比在最高0.9999的范围内连续控制。我们的主要兴趣是存在负离子对典型等离子体波和不稳定性的特征的影响，即电子等离子体波，离子波，静电离子循环循环波不稳定性以及负离子等离子体中的漂移波不稳定性。他们观察到的特性与理论预测一致。还表明，其中一些波浪和不稳定性在确定比率n _-/n_+的比率方面非常有用，尤其是在（n _+-n _-/n _-/n _+<< 1）的情况下。

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: Physical Review Letters. 61. 1615-1618 (1988)

N.Sato：《物理评论快报》。