Particle Acceleration and Dynamics of Relativistic Plasma SheetMediated by Radiation Loss

辐射损失介导的相对论性等离子体片的粒子加速和动力学

• 批准号: 22340169
• 负责人: HOSHINO Masahiro
• 金额: $ 9.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22340169/
• 关键词: 磁気リコネクション; 相対論的プラズマ; 粒子加速; 放射減衰; 乱流; 高エネルギー天体; 数値シミュレーション; 乱流加速; フェルミ加速; 相対論プラズマ

Relativistic particles generated in the course of relativistic magnetic reconnection is subject to the synchrotron radiation loss, because the strong magnetic field is needed to confine the relativistic hot plasma in the plasma sheet. The nonlinear dynamics and its particle acceleration is investigated by means of a relativistic electro-magnetic, particle-in-cell code, in which the synchrotron radiation effect is implemented. As a result, we found that fast magnetic reconnection can occur by the feedback effect of the reduction of gas pressure due to the radiation loss. In addition to the above isolated reconnection system, we also studied the complex system with multiple magnetic islands, and found that the efficiency of particle acceleration is dramatically improved.

相对论磁重联过程中产生的相对论粒子受到同步辐射损失的影响，因为需要强磁场来限制等离子体片中的相对论热等离子体。利用实现了同步辐射效应的相对论电磁粒子格子程序研究了非线性动力学及其粒子加速。结果发现，由于辐射损失引起的气体压力降低的反馈效应，可以发生快速的磁重联。除了上述孤立重联系统外，我们还研究了具有多个磁岛的复杂系统，发现粒子加速的效率大大提高。

项目成果

総説宇宙天気

一般太空天气

• 发表时间: 2011
• 作者: 中野渡広祐;宗像一起(共著)
• 通讯作者: 宗像一起(共著)

Particle acceleration during magnetorotational instability (MRI) in collisionless accretion disk

无碰撞吸积盘中磁旋转不稳定性 (MRI) 期间的粒子加速

• 发表时间: 2013
• 作者: 岡研吾、東正樹、陳威廷、辻本将彦、島川祐一、遊佐斉、Alexei Belik,水牧仁一朗、石松直樹、平岡望、Mattew Tucker;Paul Attfield;M. Hoshino
• 通讯作者: M. Hoshino

Magnetic reconnection and particle acceleration duringmagneto-rotational instability in an accretion disk

吸积盘磁旋转不稳定期间的磁重联和粒子加速

• 发表时间: 2012
• 作者: H. Nishimura;R. Mishra;S. Ohshima;H. Nakamura,他14名;M. Hoshino
• 通讯作者: M. Hoshino

Structure of a Strong Supernova Shock Wave and Rapid Electron Acceleration Confined in its Transition Region

强超新星激波的结构和限制在其过渡区的快速电子加速

• 发表时间: 2010
• 期刊: Phys.of Plasmas 17
• 作者: Shimada;N.;Hoshino,M.;Amano;T.
• 通讯作者: T.

Favorable conditions for energetic electron acceleration during magnetic reconnection in the Earth's magnetotail

• DOI: 10.1029/2011ja016576
• 发表时间: 2011-08
• 期刊: Journal of Geophysical Research
• 作者: S. Imada;M. Hirai;M. Hoshino;T. Mukai