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| 环境气体对激光诱导Al等离子体光谱的影响 | |
| 引用本文： | 张树东,刘兆远,陈冠英,刘亚楠,董晨钟.环境气体对激光诱导Al等离子体光谱的影响[J].原子与分子物理学报,2001,18(1):64-66. |
| 作者姓名： | 张树东 刘兆远 陈冠英 刘亚楠 董晨钟 |
| 作者单位： | 1. 中国科学院安徽光学精密机械研究所1室, 2. 兰州大学物理学院，兰州 730000 3. 西北师范大学物理系, |
| 基金项目： | 此工作得到国家自然科学基金(N0.19874051)和实验室专项经费的资助Project supported by the national Natural Science Fundation of China(No.19874051) and the special expenditure of the laboratory |
| 摘 要： | 调QNd:YAG脉冲激光(波长1.06μm，脉冲宽度10ns，能量42mj/pulse)烧蚀平面Al靶，在垂直靶面方向，利用光学多道分析系统(OMA)，测量了激光诱导产生的等离子体发射光谱分别在环境气体为Air，N2和Ar，气压范围分别在10-2Torr，152Torr，304Torr，532Torr和760Torr下的空间分布。实验表明，随着环境气体压强的增大，光谱的空间分布被压缩，且谱线强度的峰值向靶面方向移动；在相同的气压下，Ar环境下产生的光谱强度明显大于在Air和N2环境下产生的光谱强度；在气压为152Torr的不同环境气体下，均发现光谱在离靶面很近的地方(约0.5mm～1.0mm)减小，甚至消失；在Ar环境气体下，谱线396.1nmAlⅠ的空间分布随着与靶面距离的增大，谱线位置向短波方向有约0.03nm(对应OMA探头的一个二极管阵列)的移动，而谱线394.4nmAlⅠ的移动不太明显。 |
| 关 键 词： | 激光诱导 Al等离子体光谱 环境气体影响 空间分布 |
| 文章编号： | 1000-0364(2001)01-0064-03 |
| 修稿时间： | 2000年2月23日 |
Effect of ambient gas to the spectral distribution of laser-produced Al plasma |
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| ZHANG Shu dong ,LIU Zao yuan ,CHENG Guan yin ,LIU Ya nan ,DONG Chen shong.Effect of ambient gas to the spectral distribution of laser-produced Al plasma[J].Journal of Atomic and Molecular Physics,2001,18(1):64-66. | |
| Authors: | ZHANG Shu dong LIU Zao yuan CHENG Guan yin LIU Ya nan DONG Chen shong |
| Institution: | ZHANG Shu dong 1,LIU Zao yuan 2,CHENG Guan yin 1,LIU Ya nan 1,DONG Chen shong 1 |
| Abstract: | Q-switch Nd:YAG laser(wavelength 1.06 μm, pulse width 10 ns, energy 42 mj/pulse) was used to ablate plane solid Al target in different ambient gas. Using optical-multichannel-analysis system, the laser-produced Al plasma emission spectra has been recorded as a function of distance from target. The emission characteristics in Air, N2 and Ar atomsphere are found to depend strongly on the nature and pressure of the surrounding gas. It has been observed that the peak of spectra intensity is compressed and move to target surface when pressure increases, stronger plasmas are formed in an Ar atmosphere rather than in nitrogen and air, meanwhile, the spectra shift in Ar surrounding gas at high pressure is diecovered in a small scale. |
| Keywords: | Laser produced Al Plasmas Spectra Effect of ambient gas Distribution in spac |
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