Kinetic analysis of high energy particle generation in magnetic field remnnections

磁场残留中高能粒子产生的动力学分析

• 批准号: 18540487
• 负责人: TAKEUCHI Satoshi
• 金额: $ 2.32万
• 依托单位: University of Yamanashi
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540487/
• 关键词: plasma shock wave; high energy; magnetic neutral sheet; Magnetic Trapping Acceleration; プラズマ・核融合; 宇宙科学; プラズマ物理

A kinetic model of two colliding magnetized plasmas is proposed to investigate an acceleration of particles to very high energy. By the use of the relativistic equations of motion, trajectories of many test particles are calculated. It is found that particles are effectively accelerated by a stationary electric field generated around the center of collision. An optimal energy gain γ_s of particle is given by the mutual product of three parameters, i.e. radius of curvature α of the magnetic field, moving velocity β_p of the shock wave and initial position S_o of the test particle. The relation of these parameters is described in the formγ_s= Aβ^3_p/4_a^2S_owhere A is a constant value. This acceleration mechanism is available for high-energy particle generation over the wide range from laboratory plasmas to interstellar ones. The mechanism presented here is an advanced study of the Magnetic Trapping Acceleration (MTA) which has been expressed by the author [1].[1] S. Takeuchi, New particle accelerations by magnetized plasma shock waves, Phys. Plasmas 12, 102901 1-6 (2005).

本文提出了一个两个碰撞磁化等离子体的动力学模型来研究粒子加速到很高的能量。利用相对论运动方程，计算了许多试验粒子的运动轨迹。研究发现，粒子被碰撞中心附近产生的稳态电场有效地加速。粒子的最佳能量增益γ s由磁场曲率半径α、激波运动速度β p和测试粒子初始位置S o三个参数的乘积给出。这些参数之间的关系可用γ_s= Aβ^3_p/4_a^2S_o来描述，其中A是一个常数值。这种加速机制可用于从实验室等离子体到星际等离子体的宽范围内的高能粒子产生。本文提出的机理是对作者[1]提出的磁俘获加速（MTA）的进一步研究。[1]S. Takeuchi，New particle accelerations by magnetizedplasma shock waves，Phys. Plasmas 12，102901 1-6（2005）。

项目成果

Magnetic Trapping Acceleration in Interplanetary Plasmas

行星际等离子体中的磁捕获加速

• 发表时间: 2007
• 作者: Kouta;Kusaba;Haruo;Shindo;Satoshi Takeuchi
• 通讯作者: Satoshi Takeuchi