Experiment on Chaos Control of Plasma Wave

等离子体波混沌控制实验

• 批准号: 12480121
• 负责人: KAWAI Yoshinobu
• 金额: $ 3.65万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12480121/
• 关键词: ion beam plasma system; ion acoustic instability; intermittency chaos; double plasma; chaos control; hysteresis; drift wave; flute wave; 相関次元; バースト信号; ドリフト速度; 埋め込み法

Recently chaotic phenomena have been observed in plasma. Here, we tried to control wave chaos in unstable systems strongly related to plasma transport. Since chaos controlling was theoretically derived by Ott, Grebogi and York, many methods of controlling chaos were proposed. Now Time-Delay- Autosynchronization method (TDAS) is considered to be most observable chaos controlling theory. We carried out the experiments on both the ion beam plasma instability and the current driven ion acoustic instability using the double plasma. Main results are as follows :(1) Ion beam plasma instabilityWhen an ion beam was injected into plasma, the system developed to turbulent state, where chaotic phenomena were not observed. When a grid was installed as a boundary condition, intermittent behaviors were observed on time series. As a result of chaos analysis, the system was confirmed to be chaotic state. During chaos we propagated a test wave in the plasma to examine the detailed behavior of the system. When the amplitude of the test wave was increased, amplitude oscillation was observed, that is, particle trapping play an important role in nonlinear saturation of the instability.2. Current driven ion acoustic instabilityWe tried to control observed chaos by perturbing feed back system in the plasma and found that when DC voltage as well as pulsed voltage is applied, intermittent chaos caused by the current driven ion acoustic instability is controllable. Furthermore, a hysteresis was seen on I-V curve of the grid. Furthermore, we applied the TDAS method to the present system and found that chaos controlling is also achieved.These results contribute to nonlinear plasma wave physics. Future works is to control chaos caused by the instability in magnetized plasmas such as drift mode or flute mode which is closely related to transport phenomena in high temperature plasmas.

最近在等离子体中观察到了混沌现象。在这里，我们试图控制波混沌在不稳定的系统强烈相关的等离子体传输。自从Ott、Grebogi和约克等人对混沌控制进行了理论推导以来，人们提出了许多控制混沌的方法。时滞自同步方法（TDAS）被认为是目前最具可观测性的混沌控制理论。利用双等离子体进行了离子束等离子体不稳定性和电流驱动离子声不稳定性实验。主要结果如下：（1）离子束等离子体不稳定性当离子束注入等离子体时，系统发展到湍流状态，没有观察到混沌现象。当安装网格作为边界条件时，在时间序列上观察到间歇性行为。混沌分析结果表明，系统处于混沌状态。在混沌期间，我们在等离子体中传播了一个测试波，以检查系统的详细行为。当测试波的振幅增大时，观察到振幅振荡现象，即粒子俘获在非线性饱和不稳定性中起重要作用.电流驱动的离子声不稳定性我们试图通过扰动等离子体中的反馈系统来控制观察到的混沌，发现当施加直流电压和脉冲电压时，由电流驱动的离子声不稳定性引起的间歇混沌是可控的。此外，在栅极的I-V曲线上观察到滞后。此外，我们将TDAS方法应用于本系统，发现也实现了混沌控制，这些结果有助于非线性等离子体波物理。未来的工作是控制由磁化等离子体中的不稳定性引起的混沌，如漂移模或凹槽模，这与高温等离子体中的输运现象密切相关。

项目成果

R.Ichiki: "Ion Acoustic Waves in One-and Two-Negative Ion Species Plasmas"Phys. Plasmas. 8. 4275-4283 (2001)

R.Ichiki：“一种和两种负离子物质等离子体中的离子声波”Phys。

M. Matsukuma, Y, Kawai: "Nonlinear Saturation Mechanism of Ion-Ion Instability Due to Particle Trapping Effect"J. Phys. Soc. Jpn.. 70, 12. 3560-3564 (2001)

M. Matsukuma，Y，Kawai：“粒子捕获效应导致离子-离子不稳定性的非线性饱和机制”J。

M.Matsukuma: "Nonlinear Saturation Mechanism of Ion-Ion Instability Due to Particle Trapping Effect"J. Phys. Soc. Jpn.. 70. 3560-3564 (2001)

M.Matsukuma：“粒子捕获效应导致离子-离子不稳定性的非线性饱和机制”J。

M.Koga: "Measurement of Ion Temperature in a Large-Diameter Electron Cyclotron Resonance Plasma"Appl. Phys. Lett.. 79・19. 3041-3043 (2001)

M.Koga：“大直径电子回旋共振等离子体中的离子温度的测量”，Phys. 79・19（2001）

R. Ichiki, M. Shindo, S. Yoshimura, T. Watanabe, Y. Kawai: "Ion Acoustic Waves in One-and Two-Negative Ion Species Plasmas"Phys. Plasmas. 8, 10. 4275-4283 (2001)

R. Ichiki、M. Shindo、S. Yoshimura、T. Watanabe、Y. Kawai：“一种和两种负离子物质等离子体中的离子声波”Phys。