Laser plasma emission of small particles in different gas atmospheres

Alexander Andreev*, Toshitsugu Ueda, Muneaki Wakamatsu


研究成果: Conference contribution


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.

ホスト出版物のタイトルProceedings of SPIE - The International Society for Optical Engineering
編集者K. Sugioka, M.C. Gower, R.F. Haglund, Jr., A. Pique, others and others
出版ステータスPublished - 2002
イベントPhoton Processing in Microelectronics and Photonics - San Jose, CA, United States
継続期間: 2002 1月 212002 1月 24


OtherPhoton Processing in Microelectronics and Photonics
国/地域United States
CitySan Jose, CA

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 凝縮系物理学


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