再加热双脉冲与单脉冲激光诱导Fe等离子体发射光谱实验对比研究
Experimental Comparison Investigation on Emission Spectra of Reheating Double and Single Pulses Laser-Induced Fe Plasmas
查看参考文献22篇
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文摘
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使用单脉冲和再加热双脉冲激光对位于空气中的钢样进行烧蚀激发等离子体, 对两种方式产生的光谱进行研究。再加热双脉冲激光诱导击穿光谱采用两束激光, 一束烧蚀样品激发等离子体, 另外一束激光对产生的等离子进行加热。通过对比发现: 采用再加热双脉冲激发样品, 增强了发射光谱的信号, 增大了等离子体的连续光谱, 提高了信号的稳定性, 十次测量信号的相对标准偏差从5.0%降低到2.0%。另外, 还对影响双脉冲信号增强程度的因素进行了分析, 研究了光谱的增强程度随两脉冲间隔和采集延时的变化; 激发上能级对光谱增强程度的影响, 上能级越高增强程度越大。 |
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其他语种文摘
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Plasma of steel sample is produced by single and reheating double pulses laser-induced breakdown spectroscopy in air, and the spectrum excited by two ways is studied. Two lasers are used in reheating double pulses laser-induced breakdown spectroscopy. One arm is used to ablate samples to produce plasma; while the other arm is reheat to the produced plasma. Through comparison of reheating double pulses and single laser on steel sample show that intensity of emission spectrum is enhanced; signal of continuous spectrum is amplified; Signal repeatability is improved using reheating double pulses excitation, the measured signal relative standard deviation is decreased from 5.0% to 2.0%by ten times. In addition, the factor affecting signal enhancement is presented and discussed. The signal enhancement level with the delay between two pulses and the acquisition delay are also investigated. At the same time, an additional research issue to be tackled is the effect of the increasing influenced by excitation energy levels. The higher the excitation energy levels are, the more the enhancements are. |
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来源
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光学学报
,2011,31(10):1030002-1-1030002-7 【核心库】
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关键词
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光谱学
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激光诱导击穿光谱术
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双脉冲
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两脉冲间隔时间
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相对标准偏差
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地址
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中国科学院安徽光学精密机械研究所, 安徽, 合肥, 230031
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2239 |
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学科
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化学 |
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基金
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国家自然科学基金
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中科院合肥物质科学研究院知识创新工程领域前沿项目资助课题
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文献收藏号
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CSCD:4340424
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22
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