Spectroscopic measurements of high frequency plasma in supercritical carbon dioxide

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3091927· OSTI ID:21274206

Maehara, T; Mukasa, S; Takemori, T; Watanabe, T; Kurokawa, K; Toyota, H; Nomura, S ^[1]; Kawashima, A ^[2]; Iwamae, A ^[3]

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1. Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577 (Japan)
2. Faculty of Agriculture, Ehime University, Matsuyama 790-8566 (Japan)
3. Graduate School of Engineering, Kyoto University, Kyoto 606-8501 (Japan)

Spectroscopic measurements of high frequency (hf) plasma were performed under high pressure conditions (5 and 7 MPa) and supercritical (sc) CO{sub 2} conditions (8-20 MPa). Temperature evaluated from C{sub 2} Swan bands (d {sup 3}{pi}{sub g}{yields}a {sup 3}{pi}{sub u}) increased from 3600 to 4600 K with an increase in pressure. The first observation of broadening and shifting of the O I line profile (3p {sup 5} P{sub 3,2,1}{yields}3s {sup 5} S{sub 2}{sup 0}) of hf plasma under sc CO{sub 2} conditions 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.

• OSTI ID: 21274206
• Journal Information: Physics of Plasmas, Vol. 16, Issue 3; Other Information: DOI: 10.1063/1.3091927; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CARBON DIOXIDE
MEASURING METHODS
PLASMA
PLASMA DIAGNOSTICS
SPECTROSCOPY