| 金锥对靶背向超热电子分布的影响 |
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| 引用本文： | 熊俊,王琛,方智恒,王瑞荣,王世绩.金锥对靶背向超热电子分布的影响[J].强激光与粒子束,2006,18(11):1823-1826. |
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| 作者姓名： | 熊俊 王琛 方智恒 王瑞荣 王世绩 |
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| 作者单位： | 中国工程物理研究院 上海激光等离子体研究所, 上海 201800 |
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| 基金项目： | 国家863计划项目资助课题 |
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| 摘 要： | 采用20 TW啁啾脉冲放大的ps激光辐照金锥靶和平面靶，对靶背向产生的超热电子角分布和能谱进行了实验研究。结果表明:金锥对超热电子的产生具有重要的影响。与平面靶情况相比，锥形靶靶背向产生的超热电子数量增加，电子能量为2.0~2.5 MeV的超热电子数目有大幅度增长；锥形靶背向超热电子的空间发散角大于平面靶,这是由于啁啾脉冲放大激光所固有的较高脉冲前沿产生的预等离子体造成的影响。
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| 关 键 词： | 快点火 金锥靶 超热电子 能谱 角分布 |
| 文章编号： | 1001-4322(2006)11-1823-04 |
| 收稿时间： | 2006-04-24 |
| 修稿时间： | 2006-09-23 |
Influnce of Au cone on distribution of forward hot electrons |
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| XIONG Jun,WANG Chen,FANG Zhi-heng,WANG Rui-rong,WANG Shi-ji.Influnce of Au cone on distribution of forward hot electrons[J].High Power Laser and Particle Beams,2006,18(11):1823-1826. |
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| Authors: | XIONG Jun WANG Chen FANG Zhi-heng WANG Rui-rong WANG Shi-ji |
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| Institution: | Shanghai Institute of Laser Plasma, CAEP, P.O.Box 800-229, Shanghai 201800, China |
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| Abstract: | The 30° Au conical target and Au foil target were irradiated by 20 TW ps P-polarized laser plasma, the characteristics of the forward produced hot electrons were studied. The hot electron number of the cone target was larger than that of the foil target, especially within the range of 2.0~2.5 MeV. The divergence of the forward hot electrons of the cone target was larger than that of the plane one, which was caused by different electron density of the pre-plasma with dissimilar target geometry produced by the driving laser. |
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| Keywords: | Fast ignition Au conical target Hot electron Energy spectra Angular distribution |
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