| Item type |
テクニカルレポート / Technical Report(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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|
タイトル |
Spectral Characteristics of Arc-Heated Low Density Plasma Flows (III) Helium Plasma |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18gh |
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資源タイプ |
technical report |
| その他のタイトル |
|
|
その他のタイトル |
低密度プラズマ流のスペクトル特性(Ⅲ)ヘリウムプラズマ |
| 著者 |
渡辺, 泰夫
平林, 則明
WATANABE, Yasuo
HIRABAYASHI, Noriaki
|
| 著者所属 |
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航空宇宙技術研究所空気力学第一部 |
| 著者所属 |
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航空宇宙技術研究所空気力学第一部 |
| 著者所属（英） |
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|
en |
|
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First Aerodynamics Division, National Aerospace Laboratory(NAL) |
| 著者所属（英） |
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en |
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First Aerodynamics Division, National Aerospace Laboratory(NAL) |
| 出版者 |
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出版者 |
航空宇宙技術研究所 |
| 出版者（英） |
|
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出版者 |
National Aerospace Laboratory(NAL) |
| 書誌情報 |
航空宇宙技術研究所報告
en : Technical Report of National Aerospace Laboratory TR-962
巻 962,
p. 16,
発行日 1988-02
|
| 抄録（英） |
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内容記述タイプ |
Other |
|
内容記述 |
The spectral characteristics of helium plasma were examined in an arc-heated low density wind tunnel. He I lines in the plenum chamber showed large broadening and the profiles of 492 (2(exp 1)P-4(exp 1)D) and 447 (2(exp 3)P-4(exp 3)D) nm lines were recorded and compared with theoretical profiles of Barnard to yield electron densities. Electron densities were also estimated by the Inglis-Teller relation from the determination of merging quantum number of 2(exp 3)P-n(exp 3)D series lines. These results were by several orderes of magnitude larger than the values expected on the measured kinetic temperature and suggest large deviations from LTE (local thermodynamic equilibrium) state in the plenum chamber. Spectra excited in a low density supersonic test section flow were characterized by a strong emission of the N+2 first negative system (FNS) in addition to six series of He I lines and He2 emissions. Vibrational population distributions of N+2 FNS were measured and the excitation mechanism was discussed. Oxygen was added to the flow and the resulting spectra were identified as several 0 I lines and 0+2 FNS. It was suggested that the use of these 0 I lines might be helpful in flow characterization and surface chemistry studies in a simulation facility for atomic oxygen interactions with spacecraft surfaces in low earth orbit. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0389-4010 |
| 資料番号 |
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|
内容記述タイプ |
Other |
|
内容記述 |
資料番号: NALTR0962000 |
| レポート番号 |
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|
内容記述タイプ |
Other |
|
内容記述 |
レポート番号: NAL TR-962 |
naltr00962.pdf (1.5 MB)
