Re-Heating Effect on the Enhancement of Plasma Emission Generated from Fe Under Femtosecond Double-Pulse Laser Irradiation
In this paper, we present a study on the effect of inter-pulse delay using femtosecond double-pulse laser-induced breakdown spectroscopy in a collinear geometry. The temporal evolution of spectral intensity is performed for the lines of Fe I 423.60 nm, Fe I 425.08 nm and Fe I 427.18 nm. It is found...
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| Published in | Plasma science & technology Vol. 18; no. 12; pp. 1192 - 1197 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.12.2016
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| Online Access | Get full text |
| ISSN | 1009-0630 |
| DOI | 10.1088/1009-0630/18/12/09 |
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| Summary: | In this paper, we present a study on the effect of inter-pulse delay using femtosecond double-pulse laser-induced breakdown spectroscopy in a collinear geometry. The temporal evolution of spectral intensity is performed for the lines of Fe I 423.60 nm, Fe I 425.08 nm and Fe I 427.18 nm. It is found that, by selecting appropriate inter-pulse delay, the signal enhancement can be significantly increased compared with the single-pulse case. A three-fold enhancement in the current experiment is obtained. The plasma temperature and electron density are also investigated based on the theory of Boltzmann plot and Stark broadening. We attribute the main mechanism for emission enhancement to the plasma re-heating effect. |
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| Bibliography: | In this paper, we present a study on the effect of inter-pulse delay using femtosecond double-pulse laser-induced breakdown spectroscopy in a collinear geometry. The temporal evolution of spectral intensity is performed for the lines of Fe I 423.60 nm, Fe I 425.08 nm and Fe I 427.18 nm. It is found that, by selecting appropriate inter-pulse delay, the signal enhancement can be significantly increased compared with the single-pulse case. A three-fold enhancement in the current experiment is obtained. The plasma temperature and electron density are also investigated based on the theory of Boltzmann plot and Stark broadening. We attribute the main mechanism for emission enhancement to the plasma re-heating effect. LIBS femtosecond laser double-pulse signal enhancement WANG Ying 1,2,3 CHEN Anmin 1,2,3 LI Suyu1,3 SUI Laizhi1,3, LIU Dunli1,3, LI Shuchang1,3 LI He1,3, JIANG Yuanfei 1,3, JIN Mingxing 1,3（ 1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China 2State Key Laboratory of Laser Propulsion N： Application, Equiqment Academy, Beijing 101416, China ajilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changehun 130012, China） 34-1187/TL |
| ISSN: | 1009-0630 |
| DOI: | 10.1088/1009-0630/18/12/09 |