Generation of cosmic-ray protons at collisionless shocks via hybrid particle-in-cell simulations
| Project/Area Number |
26287041
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Nagoya University |
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Principal Investigator |
UMEDA TAKAYUKI 名古屋大学, 宇宙地球環境研究所, 講師 (40432215)
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| Co-Investigator(Renkei-kenkyūsha) |
SHOJI Masafumi 名古屋大学, 宇宙地球環境研究所, 特任助教 (80722082)
NARIYUKI Yasuhiro 富山大学, 人間発達科学部, 准教授 (50510294)
MATSUKIYO Shuichi 九州大学, 大学院総合理工学研究院, 准教授 (00380709)
SAITO Shinji 名古屋大学, 大学院理学研究科, 特任准教授 (60528165)
YAMAZAKI Ryo 青山学院大学, 理工学部, 教授 (40420509)
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| Research Collaborator |
WADA Yasutaka 名古屋大学, 大学院工学研究科
NAKAMURA Takuma オーストリア科学アカデミー, 宇宙科学研究所, 研究員
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 粒子加速 / 宇宙線 / プラズマ科学 / 超高層物理学 / 高エネルギー天文学 / 高性能計算 / 計算機シミュレーション / 超高層物理 |
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| Outline of Final Research Achievements |
The computational speed of the particle-in-cell-type plasma simulation codes is accelerated by using the counting sort algorithm and the array-particle data structure. Large-scale two-dimensional particle-in-cell simulations are carried out by using the improved code for studying non-stationarity of perpendicular shocks called the reformation. The result implies that the existence of the reformation is controlled by types of micro-instabilities at the shock transition layer.
One- and two-dimensional particle simulations are also carried out on the development of a large-amplitude whistler-mode waves in the shock transition layer. Relativistic electron acceleration is found in the 1D run. On the other hand, a rapid decay of whistler-mode waves through a new instability is found in the 2D run, which suppress the relativistic electron acceleration.
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Report
(5 results)
Research Products
(44 results)
