Study of Nonlinear Shock Acceleration Process : Origin of Cosmic Ray Anomalous Composition

非线性冲击加速过程的研究:宇宙线异常成分的起源

基本信息

项目摘要

We have studied nonlinear diffusive shock acceleration process for cosmic ray particles. (1) Importance of coherent property of large amplitude Alfven waves. (2) New theoretical result for large amplitude Alfven waves in plasmas of beta=1. (3) Under the coexistence of Alfven and sound waves, the shock compression ratio and the energy spectrum of accelerated particle are substantially modified. (4) There has been theoretical arguments that the cosmic ray composition anomaly is caused by the preferential acceleration of interstellar dust particles in the shock acceleration region, so that the accurate estimation of interstellar dust particles is crucial for the confirmation/rejection of these theoretical models. To refine the estimation of interstellar dust flux, which is needed to understand the origin of cosmic ray composition anomaly, we have obtained quantitative estimation of the uncertainty in the radar method for the interstellar dust detection. (5) By extending the radar method for dust detection, we have developed a new radar method for the observation of extensive air showers produced by highest energy cosmic rays. (6) We have obtained a new evidence of cosmic-ray-mediated shock feature at the interplanetary shock ejected from an X17 solar flare on 7 September 2005. We have also succeeded in reducing the estimation error for the shock angle determination to 30% of the previous estimations. (7) We have made a quantitative study of the particle acceleration process at interplanetary slow shocks.
研究了宇宙线粒子的非线性扩散激波加速过程。(1)大振幅阿尔芬波相干性的重要性。(2)β =1等离子体中大振幅阿尔芬波的新理论结果。(3)在Alfven波和声波共存的情况下,冲击波压缩比和加速粒子的能谱都发生了很大的变化。(4)一直有理论认为宇宙线成分异常是由星际尘埃粒子在激波加速区的优先加速引起的,因此星际尘埃粒子的准确估计对于这些理论模型的确认/拒绝至关重要。为了精确估计星际尘埃通量,这是需要了解宇宙线成分异常的起源,我们已经获得了定量估计的不确定性雷达方法的星际尘埃探测。(5)通过扩展用于尘埃探测的雷达方法,我们开发了一种新的雷达方法,用于观测由最高能量宇宙射线产生的大范围空气簇射。(6)我们在2005年9月7日X17太阳耀斑的行星际激波中获得了宇宙线介导激波特征的新证据。我们还成功地将激波角确定的估计误差减少到以前估计的30%。(7)我们对行星际慢激波中粒子加速过程进行了定量研究。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Density fluctuations induced by modulational instability of parallel propagating alfven waves with beta(f) similar to 1
β(f) 类似于 1 的平行传播阿尔文波的调制不稳定性引起的密度涨落
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Nariyuki;Y.;Hada;T
  • 通讯作者:
    T
Determination of Shock Parameters for the very fast Interplanetary Shock on 29 0ctober 2003
2003 年 10 月 29 日极快行星际激波的激波参数测定
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Terasawa;T.;ほか
  • 通讯作者:
    ほか
Geo-boundary condition determined by space plasmas
由空间等离子体确定的地质边界条件
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Terasawa;T
  • 通讯作者:
    T
Generation of phase coherence in foreshock MHD turbulence
前震 MHD 湍流中相位相干性的生成
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    羽田亨;ほか
  • 通讯作者:
    ほか
Magnetohydrodynamic parametric instabilities of parallel propagating incoherent Alven waves
平行传播非相干阿尔文波的磁流体动力学参数不稳定性
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Nariyuki;Y.;and T. Hada
  • 通讯作者:
    and T. Hada
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TERASAWA Toshio其他文献

TERASAWA Toshio的其他文献

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{{ truncateString('TERASAWA Toshio', 18)}}的其他基金

Study of Cosmic Ray p/e Ratio based on Shock Acceleration Theory
基于激波加速理论的宇宙线功率比研究
  • 批准号:
    21540259
  • 财政年份:
    2009
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Basic studies of cosmic ray shock acceleration processes
宇宙射线冲击加速过程的基础研究
  • 批准号:
    14340066
  • 财政年份:
    2002
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Particle Transport Process In the Magnetotail
磁尾中的粒子传输过程
  • 批准号:
    11640439
  • 财政年份:
    1999
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of New computational Methods in Geo-magnetohydrodynamics
地磁流体动力学新计算方法的发展
  • 批准号:
    05302024
  • 财政年份:
    1993
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for Co-operative Research (A)
Study of three dimensional reconnection processes
三维重联过程的研究
  • 批准号:
    05452081
  • 财政年份:
    1993
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

相似海外基金

Collaborative Research: Turbulence, Structures, and Diffusive Shock Acceleration
合作研究:湍流、结构和扩散冲击加速
  • 批准号:
    1707247
  • 财政年份:
    2017
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Continuing Grant
Diffusive shock acceleration of cosmic rays with non-Gaussian transport
非高斯输运宇宙射线的扩散激波加速
  • 批准号:
    23654169
  • 财政年份:
    2011
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Diffusive shock acceleration and magnetic field amplification
扩散冲击加速和磁场放大
  • 批准号:
    ST/H001948/1
  • 财政年份:
    2010
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Research Grant
The Plasma Physics of Diffusive Shock Acceleration (Atmospheric Sciences)
扩散激波加速的等离子体物理学(大气科学)
  • 批准号:
    9713223
  • 财政年份:
    1997
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Continuing grant
The Application of Diffusive Shock Acceleration to SupernovaRemnant Morphology
扩散激波加速在超新星遗迹形态学中的应用
  • 批准号:
    8817567
  • 财政年份:
    1989
  • 资助金额:
    $ 2.35万
  • 项目类别:
    Continuing Grant
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