| 高密度平面靶等离子体中激光驱动冲击波加速离子的能谱展宽 |
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| 引用本文： | 令维军,董全力,张蕾,张少刚,董忠,魏凯斌,王首钧,何民卿,盛政明,张杰.高密度平面靶等离子体中激光驱动冲击波加速离子的能谱展宽[J].物理学报,2011,60(7):75201-075201. |
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| 作者姓名： | 令维军 董全力 张蕾 张少刚 董忠 魏凯斌 王首钧 何民卿 盛政明 张杰 |
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| 作者单位： | (1)天水师范学院物理系,天水 741000; (2)天水师范学院物理系,天水 741000;中国科学院物理研究所光物理重点实验室,北京 100190; (3)中国科学院物理研究所光物理重点实验室,北京 100190; (4)中国科学院物理研究所光物理重点实验室,北京 100190;上海交通大学物理系,上海 200240 |
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| 基金项目： | 国家自然科学基金(批准号:60878020,10774184,11074297),中国科学院创新项目(批准号:KJCX2-YW-T01),国家重点基础研究发展计划(批准号:2007CB815101)和天水师范学院青蓝工程项目资助的课题. |
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| 摘 要： | 本文对超短超强激光脉冲辐照高密度等离子体产生的静电冲击波加速离子的能谱展宽机理进行了数值研究.着重讨论了三种冲击波加速离子的能谱展宽机理:能量沉积到离子中使得冲击波前沿不断减速,被加速离子与背景粒子的碰撞,以及高能离子到达靶背面时受到鞘层场进一步加速.还研究了驱动激光脉冲宽度对冲击波加速离子能谱宽度的影响.
关键词：
激光等离子体
冲击波加速
能谱展宽
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| 关 键 词： | 激光等离子体 冲击波加速 能谱展宽 |
| 收稿时间： | 2010-05-10 |
Laser driven shock accelerated ion energy spectrumbroadening mechanisms in over-dense plasmas |
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| Ling Wei-Jun,Dong Quan-Li,Zhang Lei,Zhang Shao-Gang,Dong Zhong,Wei Kai-Bin,Wang Shou-Jun,He Min-Qing,Sheng Zheng-Ming and Zhang Jie.Laser driven shock accelerated ion energy spectrumbroadening mechanisms in over-dense plasmas[J].Acta Physica Sinica,2011,60(7):75201-075201. |
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| Authors: | Ling Wei-Jun Dong Quan-Li Zhang Lei Zhang Shao-Gang Dong Zhong Wei Kai-Bin Wang Shou-Jun He Min-Qing Sheng Zheng-Ming and Zhang Jie |
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| Affiliation: | Depart of physics, Tianshui Normal College, Tianshui 741000, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Depart of physics, Tianshui Normal College, Tianshui 741000, China;Depart of physics, Tianshui Normal College, Tianshui 741000, China;Depart of physics, Tianshui Normal College, Tianshui 741000, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | The broadening mechanisms are investigated for the energy spectrum of ions accelerated by electrostatic shocks in overdense plasmas irradiated by intense ultra-short laser pulses. It is found that the width of the shock-accelerated ion spectrum could be ineluctably broadened by three mechanisms, which are the continuously decreasing speed of the shock front due to the energy dissipation into ions, the collisions between the particles, and the further acceleration by the sheath field at the rear of target where when energetic ions arrive. Other effects, such as effect of driving laser pulse duration, are also studied. |
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| Keywords: | laser-plasma shock acceleration spectrum broadening |
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