Spectroscopic measurements of high frequency plasma in supercritical carbon dioxide

Maehara, Tsunehiro*; Kawashima, Ayato*; Iwamae, Atsushi; Mukasa, Shinobu*; Takemori, Toshihiko*; Watanabe, Takashi*; Kurokawa, Kenya*; Toyota, Hiromichi*; Nomura, Shinfuku*

Spectroscopic measurements of high frequency (hf) plasma were performed under high pressure conditions (5 and 7 MPa) and supercritical (sc) CO $_{2}$ conditions ( MPa). Temperature evaluated from C $_{2}$ Swan bands () increased from 3600 to 4600 K with an increase in pressure. The first observation of broadening and shifting of the O I line profile ( $3{rm s},^5{rm S}_2^o leftarrow 3{rm p},^5{rm P}_{3,2,1}$ ) of hf plasma under sc CO $_{2}$ concisions was carried out. However, the origin of broadening and the shifting cannot be understood because the present theory explaining them is not valid for such high pressure conditions.

Language	:	English
Journal	:	Physics of Plasmas
Volume	:	16
Number	:	3
Pages	:	p.033503_1 - 033503_5
Publication Year/Month	:	2009/03
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Paper URL	:	https://doi.org/10.1063/1.3091927
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Keywords	:	no keyword
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Registration No. : AA20080984
JAEA Abstracts No. : 37000646
Paper Submission No. : 5674

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