Optical Emission of Molecular Hydrogen in a Recombining Hydrogen Plasma |
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Authors: | K. Sasaki R. Asakawa |
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Affiliation: | 1. Division of Quantum Science and Engineering, Hokkaido University, Kita 13, Nishi 8, Kita‐ku, Sapporo 060‐8628, Japan;2. Department of Electrical Engineering and Computer Science, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8603, Japan |
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Abstract: | We observed optical emission of molecular hydrogen in a recombining hydrogen plasma with an electron temperature of 0.1 eV and an electron density of 3 × 1012cm–3. The optical emission intensities of molecular hydrogen in the recombining plasma were roughly 10%–45% of those in an ionizing plasma with an electron temperature of 4 eV. The ratio was greater for a transition line originated from an excited state with a larger vibrational quantum number. Because of the low electron temperature of 0.1 eV, the production processes of excited states are not considered electron impact excitation in the recombining plasma. Possible recombination processes are discussed which produce excited states of molecular hydrogen in the recombining plasma (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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Keywords: | Recombining plasma optical emission molecular hydrogen recombination processes |
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