| 气压对激光烧蚀Al等离子体中粒子速度的影响 |
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| 引用本文： | 张树东,陈冠英,刘亚楠,董晨钟.气压对激光烧蚀Al等离子体中粒子速度的影响[J].原子核物理评论,2002,19(2):206-208. |
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| 作者姓名： | 张树东 陈冠英 刘亚楠 董晨钟 |
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| 作者单位： | 1 西北师范大学物理与电子工程学院; 2 中国科学院安徽光学精密机械研究所环境光谱学实验室; |
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| 基金项目： | 教育部优秀教师资助计划项目; 教育部高等学校骨干教师资助计划(GG-140107361002); 兰州重离子加速器国家实验室原子核理论研究中心基金 |
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| 摘 要： | 在背景气压为8× 10-3— 100Pa范围内 ,通过测量脉冲激光烧蚀平面Al靶产生的等离子体辐射谱的时间分辨特征 ,比较空间不同点辐射的飞行时间轮廓的相对延迟 ,从而得到辐射粒子速度及其空间分布 .利用绝热膨胀的理论和激波模型分别对背景气压小于 0 .6Pa的结果和 5Pa时的结果作了分析 ,并得出激波的波面基本上为柱对称. With the ambient gas pressure in the range from 8×10 -3 to 10 2 Pa, Q-switched YAG laser ablates plane aluminum target and plasma are produced. Optical emission spectroscopy is used to carry out time-resolved analysis of atomic particles. Using the resonance transition of Al I 396.1 nm (3p 2P-4s 2S), the spatiol velocity distribution of Al I has been obtained under the laser energies of 160 mJ/pulse when the ablating size is about 200 μm. The velocity is at the order of 10 6 cm/s...
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| 关 键 词： | 激光等离子体 平面铝靶 粒子速度分布 激波模型 背景气压 |
| 文章编号： | 1007-4627(2002)02-0206-03 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2002年3月20日 |
Influence of Ambient Pressure on Velocity of Emission Particle of Laser-ablated Al Target |
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| ZHANG Shu-dong,CHEN Guan-ying,LIU Ya-nan,DONG Chen-zhong.Influence of Ambient Pressure on Velocity of Emission Particle of Laser-ablated Al Target[J].Nuclear Physics Review,2002,19(2):206-208. |
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| Authors: | ZHANG Shu-dong CHEN Guan-ying LIU Ya-nan DONG Chen-zhong |
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| Institution: | (1 College of Physics and Electronic Engineering; Northwest Normal University; Lanzhou 730070; China; 2 Laboratory of Environmental Spectroscopy; Anhui Inst; |
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| Abstract: | With the ambient gas pressure in the range from 8×10 -3 to 10 2 Pa, Q-switched YAG laser ablates plane aluminum target and plasma are produced. Optical emission spectroscopy is used to carry out time-resolved analysis of atomic particles. Using the resonance transition of Al I 396.1 nm (3p 2P-4s 2S), the spatiol velocity distribution of Al I has been obtained under the laser energies of 160 mJ/pulse when the ablating size is about 200 μm. The velocity is at the order of 10 6 cm/s... |
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