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Dual-wavelength laser induced breakdown spectroscopic technique for emission enhancement in vacuum

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Abstract

A novel approach of dual-wavelength LIBS with a single Nd3+:YAG laser is proposed and demonstrated for lunar-simulant analysis in high vacuum conditions. Laser ablation was performed at 355 nm/532 nm wavelength, and subsequently, the plasma was reexcited with the fundamental (1064 nm) wavelength. The interpulse delay was adjusted by varying the optical path length. A significant line intensity enhancement up to a factor of 3 was observed for many of the dominant emission lines of the lunar simulant sample. A theoretical model for understanding the mechanism behind the intensity improvements of dual-wavelength configurations is also discussed. Experimentally observed plasma temperature was comparable with theoretically estimated plasma temperature of silicon, which is the major constituent of lunar simulant.

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Acknowledgements

Authors are thankful to ISRO-IITM Technology Cell for the financial support. Authors are also grateful to Professor Tatsuo Okada and his research group for providing an opportunity to perform part of the experiments at the Kyushu University, Japan.

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Authors and Affiliations

  1. Department of Engineering Design, Indian Institute of Technology Madras, Chennai, 600036, India

    Jobin K. Antony & Nilesh J. Vasa

  2. LEOS-Indian Space Research Organization, Bangalore, 560058, India

    V. L. N. SridharRaja & A. S. Laxmiprasad

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  1. Jobin K. Antony
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  2. Nilesh J. Vasa
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  3. V. L. N. SridharRaja
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  4. A. S. Laxmiprasad
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Correspondence to Jobin K. Antony.

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Antony, J.K., Vasa, N.J., SridharRaja, V.L.N. et al. Dual-wavelength laser induced breakdown spectroscopic technique for emission enhancement in vacuum. Appl. Phys. A 112, 215–219 (2013). https://doi.org/10.1007/s00339-012-7282-y

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  • DOI: https://doi.org/10.1007/s00339-012-7282-y

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