Re-Heating Effect on the Enhancement of Plasma Emission Generated from Fe Under Femtosecond Double-Pulse Laser Irradiation

WANG Ying (王莹); CHEN Anmin (陈安民); LI Suyu (李苏宇); SUI Laizhi (隋来志); LIU Dunli (刘敦利); LI Shuchang (李舒畅); LI He (李贺); JIANG Yuanfei (姜远飞); JIN Mingxing (金明星)

doi:10.1088/1009-0630/18/12/09

Plasma Science and Technology > 2016 > 18(12): 1192-1197. > DOI: 10.1088/1009-0630/18/12/09

WANG Ying (王莹), CHEN Anmin (陈安民), LI Suyu (李苏宇), SUI Laizhi (隋来志), LIU Dunli (刘敦利), LI Shuchang (李舒畅), LI He (李贺), JIANG Yuanfei (姜远飞), JIN Mingxing (金明星). Re-Heating Effect on the Enhancement of Plasma Emission Generated from Fe Under Femtosecond Double-Pulse Laser Irradiation[J]. Plasma Science and Technology, 2016, 18(12): 1192-1197. DOI: 10.1088/1009-0630/18/12/09

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Re-Heating Effect on the Enhancement of Plasma Emission Generated from Fe Under Femtosecond Double-Pulse Laser Irradiation

1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China 2State Key Laboratory of Laser Propulsion & Application, Equiqment Academy, Beijing 101416, China 3Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China

Funds: supported by the National Basic Research Program of China (No. 2013CB922200), the China Postdoctoral Science Foundation (No. 2014M551169), National Natural Science Foundation of China (Nos. 11674128, 11474129 and 11504129)

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Received Date: January 19, 2016

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Abstract

Abstract

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

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References

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