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Title: Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy

Abstract

We experimentally study the dynamics of the plasma induced by the double-laser-pulse irradiation of solid target in water, and find that an appropriate choice of the pulse energies and pulse interval results in the production of an unprecedentedly mild (low-density) plasma, the emission spectra of which are very narrow even without the time-gated detection. The optimum pulse interval and pulse energies are 15-30 {mu}s and about {approx}1 mJ, respectively, where the latter values are much smaller than those typically employed for this kind of study. In order to clarify the mechanism for the formation of mild plasma we examine the role of the first and second laser pulses, and find that the first pulse produces the cavitation bubble without emission (and hence plasma), and the second pulse induces the mild plasma in the cavitation bubble. These findings may present a new phase of underwater laser-induced breakdown spectroscopy.

Authors:
 [1]; ; ; ;  [1]
  1. Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011 (Japan)
Publication Date:
OSTI Identifier:
22047206
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 136; Journal Issue: 17; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BUBBLES; CAVITATION; EMISSION SPECTRA; LASERS; PLASMA; PLASMA PRODUCTION; PULSED IRRADIATION; PULSES; SPECTROSCOPY

Citation Formats

Sakka, Tetsuo, Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Tamura, Ayaka, Nakajima, Takashi, Fukami, Kazuhiro, and Ogata, Yukio H. Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy. United States: N. p., 2012. Web. doi:10.1063/1.4709391.
Sakka, Tetsuo, Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Tamura, Ayaka, Nakajima, Takashi, Fukami, Kazuhiro, & Ogata, Yukio H. Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy. United States. https://doi.org/10.1063/1.4709391
Sakka, Tetsuo, Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Tamura, Ayaka, Nakajima, Takashi, Fukami, Kazuhiro, and Ogata, Yukio H. 2012. "Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy". United States. https://doi.org/10.1063/1.4709391.
@article{osti_22047206,
title = {Synergetic effects of double laser pulses for the formation of mild plasma in water: Toward non-gated underwater laser-induced breakdown spectroscopy},
author = {Sakka, Tetsuo and Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011 and Tamura, Ayaka and Nakajima, Takashi and Fukami, Kazuhiro and Ogata, Yukio H},
abstractNote = {We experimentally study the dynamics of the plasma induced by the double-laser-pulse irradiation of solid target in water, and find that an appropriate choice of the pulse energies and pulse interval results in the production of an unprecedentedly mild (low-density) plasma, the emission spectra of which are very narrow even without the time-gated detection. The optimum pulse interval and pulse energies are 15-30 {mu}s and about {approx}1 mJ, respectively, where the latter values are much smaller than those typically employed for this kind of study. In order to clarify the mechanism for the formation of mild plasma we examine the role of the first and second laser pulses, and find that the first pulse produces the cavitation bubble without emission (and hence plasma), and the second pulse induces the mild plasma in the cavitation bubble. These findings may present a new phase of underwater laser-induced breakdown spectroscopy.},
doi = {10.1063/1.4709391},
url = {https://www.osti.gov/biblio/22047206}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 17,
volume = 136,
place = {United States},
year = {Mon May 07 00:00:00 EDT 2012},
month = {Mon May 07 00:00:00 EDT 2012}
}