| Time-resolved measurement of atomic emission enhancement by fs-ns dual-pulsed laser-induced breakdown spectroscopy |
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| 作者姓名： | 颜立新 张永生 郑国鑫 刘晶儒 程建平 吕 敏 |
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| 作者单位： | epartment of Engineering Physics, Tsinghua University,Beijing 100084, China
Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China;Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China;Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China;Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China;epartment of Engineering Physics, Tsinghua University,Beijing 100084, China;epartment of Engineering Physics, Tsinghua University,Beijing 100084, China |
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| 基金项目： | Project supported by the
National Natural Science Foundation of China (Grant No 10474081). |
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| 摘 要： | Time-resolved measurement of atomic emission enhancement is performed by using a 500-fs KrF laser pulse incident upon a high density supersonic O2 gas jet, synchronized with an orthogonal ns frequency-doubled Nd：YAG laser pulse. The ultra-short pulse serves as an igniter of the gas jet, and the subsequent ns-laser pulse significantly enhances the atomic emission. Analysis shows that the contributions to the enhancement effect are made mainly by the bremsstrahlung radiation and cascade ionization.
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| 关 键 词： | 原子发射增殖 双重脉冲LIBS 激光诱导 击穿光谱 |
| 收稿时间： | 2005-12-06 |
| 修稿时间： | 6/7/2006 12:00:00 AM |
Time-resolved measurement of atomic emission enhancement by fs--ns dual-pulsed laser-induced breakdown spectroscopy |
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| Yan Li-Xin,Zhang Yong-Sheng,Zheng Guo-Xin,Liu Jing-Ru,Cheng Jian-Ping,Lü Min.Time-resolved measurement of atomic emission enhancement by fs-ns dual-pulsed laser-induced breakdown spectroscopy[J].Chinese Physics B,2006,15(10):2271-2274. |
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| Authors: | Yan Li-Xin Zhang Yong-Sheng Zheng Guo-Xin Liu Jing-Ru Cheng Jian-Ping Lü Min |
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| Institution: | epartment of Engineering Physics, Tsinghua University,Beijing 100084, China; epartment of Engineering Physics, Tsinghua University,Beijing 100084, China
Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China; Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China |
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| Abstract: | Time-resolved measurement of atomic emission enhancement is performed by using a
500-fs KrF laser pulse incident upon a high density supersonic O_{2} gas jet,
synchronized with an orthogonal ns frequency-doubled Nd:YAG laser pulse. The
ultra-short pulse serves as an igniter of the gas jet, and the subsequent ns-laser
pulse significantly enhances the atomic emission. Analysis shows that the
contributions to the enhancement effect are made mainly by the bremsstrahlung
radiation and cascade ionization. |
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| Keywords: | time-resolved measurement atomic emission enhancement dual-pulse LIBS |
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