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Measurements of egg shell plasma parameters using laser-induced breakdown spectroscopy

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Abstract

Measurements of 1064 nm laser-induced egg shell plasma parameters are presented in this paper. Of special interests were its elemental identification and the determination of spectroscopic temperature and electron density. The electron temperature of 5956 K was inferred using an improved iterative Boltzmann plot method with six calcium atomic emission lines, and the electron number density of 6.1 × 1016 cm−3 was determined by measuring the width of Stark-broadened once-ionized calcium line at 393.37 nm. Based on the experimental results, the laser-induced egg shell plasma was verified to be optically thin and satisfy local thermodynamic equilibrium (LTE). Furthermore, experiments also demonstrated that the loss of energy due to the reflection of the laser beam from the plasma can be neglected and the inverse bremsstrahlung (IB) absorption was the dominant mechanism of plasma heating at the IR wavelength.

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Acknowledgements

Author wants to thank State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, CAS. This work is supported by Scientific Research Program Funded by Shaanxi Provincial Education Department (2013JK0607) and by General Program Funded by Youth Foundation of Xi’an University of Posts and Telecommunications (ZL2013-14). This work is also supported by the Natural Science Foundation of Shaanxi Province of China (2013JM1008) and National Natural Science Foundation of China (11304247).

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Authors and Affiliations

  1. School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi, 710121, China

    WENFENG LUO, SHUYUAN LV & HAIYAN ZHU

  2. School of Physics and Mechanical and Electronic Engineering, Xi’an University, Xi’an, Shaanxi, 710065, China

    XIAOXIA ZHAO

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  1. WENFENG LUO
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  2. XIAOXIA ZHAO
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Correspondence to WENFENG LUO.

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LUO, W., ZHAO, X., LV, S. et al. Measurements of egg shell plasma parameters using laser-induced breakdown spectroscopy. Pramana - J Phys 85, 105–114 (2015). https://doi.org/10.1007/s12043-014-0893-4

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  • DOI: https://doi.org/10.1007/s12043-014-0893-4

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