Deuterium Emission in Laser Plasma Induced by Transversely Excited Atmospheric Pressure CO<sub>2</sub>Laser in Low-Pressure of Helium Surrounding Gas

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  • Idris Nasrullah
    Department of Fiber Amenity Engineering, Graduate School of Engineering, Fukui University
  • Kobayashi Takao
    Department of Fiber Amenity Engineering, Graduate School of Engineering, Fukui University
  • Kurniawan Hendrik
    Research Center of Maju Makmur Mandiri
  • Lie Tjung Jie
    Research Center of Maju Makmur Mandiri
  • Maruyama Tadashi
    Department of Nuclear Power and Energy Safety Engineering, Faculty of Engineering, Fukui University
  • Kagawa Kiichiro
    Department of Physics, Faculty of Education and Regional Studies, Fukui University

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  • Deuterium Emission in Laser Plasma Induced by Transversely Excited Atmospheric Pressure CO2 Laser in Low-Pressure of Helium Surrounding Gas

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A transversely excited atmospheric pressure (TEA) CO2 laser was focused on samples containing hydrogen of high concentration in ambient gas of low pressure. The optimum conditions for reducing the spectral width of Hα emission have been investigated. As a result, it was found that a film sample is superior to a bulk sample, and He gas should be used as the ambient gas at approximately 1 Torr, and for spectral measurement, only the front area of the plasma should be selected. We successfully demonstrated the detection of Dα emission, of which peak shifts only 0.179 nm from the Hα emission, by employing a D2O liquid film sandwiched between a Cu plate and a thin plastic wrapping film.

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