Laser plasma emission of small particles in different gas atmospheres

Alexander Andreev; Toshitsugu Ueda; Muneaki Wakamatsu

doi:10.1117/12.470648

Laser plasma emission of small particles in different gas atmospheres

Alexander Andreev^*, Toshitsugu Ueda, Muneaki Wakamatsu

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The problem of laser pulse interaction with small solid particles (SSP) in a gas atmosphere when detecting its parameters is a serious one in industrial and environmental applications. Previous investigations have shown the possibility of using the laser induced breakdown method. This method is very sensitive, but for a particle size of less than 0.1 μm the damage threshold of the solid target is very close to the breakdown point of pure gas. At breakdown, a small volume of dense hot plasma emits radiation by which the size and material of particles can be detected. We used an analytical model, simulation code and experiments to analyze this radiation and found that the emitted intensity varied with laser, gas and particle parameters. The increased dependence of SSP plasma emission rate on initial particle volume permits this method to be used for measuring small particle size by using emitted line spectrum at the late time stage.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Editors	K. Sugioka, M.C. Gower, R.F. Haglund, Jr., A. Pique, others and others
Pages	413-418
Number of pages	6
Volume	4637
DOIs	https://doi.org/10.1117/12.470648
Publication status	Published - 2002
Externally published	Yes
Event	Photon Processing in Microelectronics and Photonics - San Jose, CA, United States Duration: 2002 Jan 21 → 2002 Jan 24

Other

Other	Photon Processing in Microelectronics and Photonics
Country/Territory	United States
City	San Jose, CA
Period	02/1/21 → 02/1/24

Keywords

Gas atmosphere
Measurement
Plasma
Pulse laser
Radiation
Small particle

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

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10.1117/12.470648

Cite this

Laser plasma emission of small particles in different gas atmospheres. / Andreev, Alexander; Ueda, Toshitsugu; Wakamatsu, Muneaki.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / K. Sugioka; M.C. Gower; R.F. Haglund, Jr.; A. Pique; others and others. Vol. 4637 2002. p. 413-418.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Andreev, A, Ueda, T & Wakamatsu, M 2002, Laser plasma emission of small particles in different gas atmospheres. in K Sugioka, MC Gower, RF Haglund, Jr., A Pique & O and others (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4637, pp. 413-418, Photon Processing in Microelectronics and Photonics, San Jose, CA, United States, 02/1/21. https://doi.org/10.1117/12.470648

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title = "Laser plasma emission of small particles in different gas atmospheres",

abstract = "The problem of laser pulse interaction with small solid particles (SSP) in a gas atmosphere when detecting its parameters is a serious one in industrial and environmental applications. Previous investigations have shown the possibility of using the laser induced breakdown method. This method is very sensitive, but for a particle size of less than 0.1 μm the damage threshold of the solid target is very close to the breakdown point of pure gas. At breakdown, a small volume of dense hot plasma emits radiation by which the size and material of particles can be detected. We used an analytical model, simulation code and experiments to analyze this radiation and found that the emitted intensity varied with laser, gas and particle parameters. The increased dependence of SSP plasma emission rate on initial particle volume permits this method to be used for measuring small particle size by using emitted line spectrum at the late time stage.",

keywords = "Gas atmosphere, Measurement, Plasma, Pulse laser, Radiation, Small particle",

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AB - The problem of laser pulse interaction with small solid particles (SSP) in a gas atmosphere when detecting its parameters is a serious one in industrial and environmental applications. Previous investigations have shown the possibility of using the laser induced breakdown method. This method is very sensitive, but for a particle size of less than 0.1 μm the damage threshold of the solid target is very close to the breakdown point of pure gas. At breakdown, a small volume of dense hot plasma emits radiation by which the size and material of particles can be detected. We used an analytical model, simulation code and experiments to analyze this radiation and found that the emitted intensity varied with laser, gas and particle parameters. The increased dependence of SSP plasma emission rate on initial particle volume permits this method to be used for measuring small particle size by using emitted line spectrum at the late time stage.

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KW - Measurement

KW - Plasma

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KW - Radiation

KW - Small particle

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Laser plasma emission of small particles in different gas atmospheres

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Keywords

ASJC Scopus subject areas

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