2011 Fiscal Year Final Research Report
Study of collisionless shocks, particle acceleration and magnetic field generation by using large-scale plasma particle simulation
Project/Area Number |
22740164
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Hiroshima University (2011) Osaka University (2010) |
Principal Investigator |
TSUNEHIKO Kato 広島大学, 大学院・理学研究科, 特任助教 (90413955)
|
Project Period (FY) |
2010 – 2011
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Keywords | プラズマ / 衝撃波 / 粒子加速 / 不安定性 / 磁場生成 / 宇宙物理学 / レーザー実験 |
Research Abstract |
By using large-scale plasma particle simulations, we study high-Mach number collisionless shocks in weakly magnetized electron-proton plasmas, which are frequently driven in a variety of astrophysical environment, such as supernova remnants. It is shown that the Weibel instability is driven in the shock transition region even in perpendicular shocks, and then, turbulent magnetic fields are generated by this instability in the transition region and the downstream region. It is also found that in quasi-parallel shocks a particle acceleration mechanism similar to the Fermi acceleration works and efficiently generates high-energy particles with a power-law energy spectrum.
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[Journal Article] Collisionless shockwaves formedby counter-streaming laser-producedplasmas2011
Author(s)
X Liu, Y T Li, Y Zhang, J Y Zhong, W DZheng, Q L Dong, M Chen, G Zhao, YSakawa, T Morita, Y Kuramitsu, T N Kato, L M Chen, X Lu, J L Ma, W M Wang, Z MSheng, H Takabe, Y-J Rhee, Y K Ding, S EJiang, S Y Liu, J Q Zhu and JZhang
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Journal Title
New Journal of Physics
Volume: 13
Pages: 8
DOI
Peer Reviewed
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[Journal Article] Collisionless shockgeneration in high-speedcounter-streaming plasma flows by ahigh-power laser2010
Author(s)
T. Morita, Y. Sakawa, Y. Kuramitsu, S. Dono, H. Aoki, H. Tanji, T. N. Kato, Y. T. Li, Y. Zhang, X. Liu, J. Y. Zhong, H. Takabe, and J. Zhang
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Journal Title
Physics of Plasmas
Volume: 17
Pages: 15
DOI
Peer Reviewed
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