| 激光等离子体相互作用的数值模拟 |
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| 引用本文： | 张海鸥,王琨,王桂兰.激光等离子体相互作用的数值模拟[J].强激光与粒子束,2007,19(12):2039-2042. |
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| 作者姓名： | 张海鸥 王琨 王桂兰 |
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| 作者单位： | 1. 华中科技大学 数字装备制造与技术国家重点实验室, 武汉 430074；2. 华中科技大学 塑性成形模拟与模具国家重点实验室, 武汉 430074 |
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| 基金项目： | 国家自然科学基金资助课题(50474053) |
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| 摘 要： | 基于激光等离子体相互作用的复杂物理过程的数学模型，采用PIC方法分别研究了P极化和S极化非均匀短脉冲强激光入射均匀分布的稠密等离子体时引起的空泡、成丝等物理现象。模拟了激光脉冲在真空中的3维传播形貌。由3维密度分布图发现：激光产生的巨大的有质动力向两侧推动粒子，形成等离子体密度通道；当激光脉冲入射等离子体区域后，纵向加速的电子速度峰值出现在电流峰值处。
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| 关 键 词： | 激光等离子体 数值模拟 激光脉冲形貌 脉冲宽度 |
| 文章编号： | 1001-4322（2007）12-2039-04 |
| 收稿时间： | 2006-09-19 |
| 修稿时间： | 2007-05-17 |
Numerical simulation of laser plasma interaction |
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| ZHANG Hai-ou,WANG Kun,WANG Gui-lan.Numerical simulation of laser plasma interaction[J].High Power Laser and Particle Beams,2007,19(12):2039-2042. |
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| Authors: | ZHANG Hai-ou WANG Kun WANG Gui-lan |
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| Institution: | 1. State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2. State Key Laboratory of Plastic Forming Simulation of Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | A mathematical model was developed to investigate the complex physical process of laser plasma interaction,adopting the PIC(particle-in-cell) approach to study the phenomena when heterogeneous ultra-short and ultra-high laser pulse propagated through over-dense plasma.Through the simulation of 3D laser pulse appearance in vacuum,it was found that a channel was formed due to the extremely large ponderomotive force associated with laser pulse.The lengthways electron velocity appeared in the position of the peak electric current intensity and the wave length became longer,which is coincident with the local oscillating electron heating mechanism basically. |
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| Keywords: | Laser plasma interaction 3D simulation Laser pulse appearance Pulse width |
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