Dynamical Phenomena in Plasma Wave Systems

等离子体波系统中的动力学现象

基本信息

批准号：
63302062
负责人：
WADATI Miki
金额：
$ 4.8万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
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/grant/KAKENHI-PROJECT-63302062/
关键词：
Soliton Chaos Drift wave Ion sound wave Alfven wave Particle acceleration Electron beam plasma Knot theory 電子ビ-ム・プラズマイオン音波イオン加速機構ソリトン方程式

项目摘要

1. Properties and roles of solitons in the nonlinear development of unstable waves were clarified for ion beam and electron beam plasmas. Formation of solitons works to stabilize the instability, which was confirmed by experiments.2. As a new mechanism of particle acceleration, resonant acceleration by large amplitu magneto-sonic waves was proposed. Rapid particle acceleration in solar flares is explained by this mechanism.3. Nonlinear Alfven waves propagating along magnetic flux was investigated by using the derivative nonlinear Schrodinger equation. Relations between initial conditions and numbers of emerging solitons were obtained.4. Using double plasma device, chaos phenomena such as period doubling of pump waves and higher harmonics generation of electron plasma waves were observed.5. Considering the nonlinear Schrodinger equation with a dissipative term, properties of multi-soliton states under the perturbations were clarified.6. Employing vortex filament approximation for drift waves, dynamical and statistical properties of vortex filaments were investigated. Diffusion constant for vortices was analytically obtained.7. A general theory to construct new link polynomials from soliton theory was proposed. Link polynomials give a systematic method to classify knots and links.8. Propagations and excitations of drift waves in non-uniform magnetized plasmsas were investigated. Drift pulse waves, which have sbliton properties, were observed.9. Reflections and transmissions of ion sound wave solitons were studied. Techniques for the creation of large amplitude ion waves were developed.10. To the particle under cyclotron motion, a static electric wave perpendicular to the magnetic field is applied. Formation of a thin stochastic layer in phase space was shown numerically.

1。在离子束和电子束等离子体上阐明了孤子在不稳定波的非线性发育中的特性和作用。孤子的形成旨在稳定不稳定性，这是通过实验证实的2。作为颗粒加速度的新机制，提出了大型Amplitu磁通波的共振加速度。太阳耀斑中的快速颗粒加速度通过这种机制来解释3。使用衍生的非线性Schrodinger方程研究了沿磁通量传播的非线性alfven波。获得初始条件和新兴孤子数量之间的关系。4。使用双血浆装置，观察到混乱现象，例如泵波的周期倍增和较高的电子等离子体波的产生。5。考虑到具有耗散术语的非线性schrodinger方程，阐明了多 - 苏里顿状态的性质。6。研究了用于漂移波的涡旋细丝近似，研究了涡流丝的动态和统计特性。分析获得涡流的扩散常数7。提出了一种构建来自孤子理论的新链接多项式的一般理论。链接多项式提供了一种系统的方法来对结和链接进行分类。8。研究了不均匀磁化等离子体中漂移波的传播和激发。观察到具有Sbliton特性的漂移脉冲波。9。研究了离子声波孤子的反射和传输。开发了创建大振幅离子波的技术。10。在回旋子运动下，施加了垂直于磁场的静电波。在数值上显示了相空间中薄随机层的形成。