Density Measurement of Helium Metastable Atoms in a Plasma by the Laser-Induced Fluorescence Method

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概要

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• Density profiles of helium metastable atoms in 2^3S and 2^1S levels have been measured in a plasma (n_e〜10^<12> cm^<-3>, T_e〜7 eV, radius of the plasma column〜1 cm) by the Laser-Induced Fluorescence Method (LIFM), where both quenching effects of fluorescence by plasma and characteristics of laser radiation are taken into account. The He(2^3S) metastable atoms are distributed in inverse proportion to the radius in the periphery of the plasma column (r>1 cm), while the profile of He(2^1S) metastable atoms has a gentle slope compared with that of He(2^3S) atoms. The difference in the density distributions is thought to be caused by the production of He(2^1S) atoms in the plasma periphery through the n^1P (n≧2) levels due to optical excitation processes of He(1^1S) by resonance lines emitted from the plasma column.

• 社団法人応用物理学会の論文
• 1984-03-20

著者

• Tsuchida Kazuki

  Institute Of Plasma Physics Nagoya University

関連論文

• Space-Resolved Measurement of Electron Density by Neutral Li Beam Probing in NBT
• Density Measurement of Helium Metastable Atoms in a Plasma by the Laser-Induced Fluorescence Method

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