Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI

Tomohide Niimi, Hideo Mori, Isao Akiyama, Takumi Tsuzuki

研究成果: 著書/レポートタイプへの貢献会議での発言

抄録

In the present study, we measure the rotational population in supersonic nitrogen free jets using a REMPI (resonantly enhanced multi-photon ionization) method, which is not influenced by secondary electrons, unlike an electron beam method. Nitrogen ions are detected as a REMPI signal and its spectra depending on the wavelength of an irradiated laser beam are analyzed to measure rotational temperature through the Boltzmann plot. Nitrogen gas expands into a vacuum chamber from a sonic nozzle with a D=0.50mm diameter, setting P0D (P0: source pressure), depending inversely on the nozzle Knudsen number, at 15 Torr-mm or lower. In the case of P0D=15.0, the rotational temperature distribution along the centerline of the jet, measured by Boltzmann plot, coincides with Marrone's data measured by electron beam fluorescence, and the rotational relaxation rate Zr calculated by the relaxation equation results in 1.3. However, the non-Boltzmann rotational distribution appears evidently in the supersonic free molecular nitrogen flows for P 0D≤15 Torr-mm and as a decrease in the P0D, the deviation from the Boltzmann distribution and the partial freezing of the population arise more upstream.

元の言語英語
ホスト出版物のタイトルRAREFIED GAS DYNAMICS
ホスト出版物のサブタイトル24th International Symposium on Rarefied Gas Dynamics, RGD24
ページ1025-1030
ページ数6
DOI
出版物ステータス出版済み - 5 16 2005
イベント24th International Symposium on Rarefied Gas Dynamics, RGD24 - Bari, イタリア
継続期間: 7 10 20047 16 2004

出版物シリーズ

名前AIP Conference Proceedings
762
ISSN(印刷物)0094-243X
ISSN(電子版)1551-7616

その他

その他24th International Symposium on Rarefied Gas Dynamics, RGD24
イタリア
Bari
期間7/10/047/16/04

Fingerprint

nitrogen
ionization
photons
sonic nozzles
plots
electron beams
Knudsen flow
Boltzmann distribution
free jets
nitrogen ions
vacuum chambers
upstream
freezing
nozzles
temperature distribution
laser beams
deviation
fluorescence
gases
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Niimi, T., Mori, H., Akiyama, I., & Tsuzuki, T. (2005). Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI. : RAREFIED GAS DYNAMICS: 24th International Symposium on Rarefied Gas Dynamics, RGD24 (pp. 1025-1030). (AIP Conference Proceedings; 巻数 762). https://doi.org/10.1063/1.1941669

Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI. / Niimi, Tomohide; Mori, Hideo; Akiyama, Isao; Tsuzuki, Takumi.

RAREFIED GAS DYNAMICS: 24th International Symposium on Rarefied Gas Dynamics, RGD24. 2005. p. 1025-1030 (AIP Conference Proceedings; 巻 762).

研究成果: 著書/レポートタイプへの貢献会議での発言

Niimi, T, Mori, H, Akiyama, I & Tsuzuki, T 2005, Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI. : RAREFIED GAS DYNAMICS: 24th International Symposium on Rarefied Gas Dynamics, RGD24. AIP Conference Proceedings, 巻. 762, pp. 1025-1030, 24th International Symposium on Rarefied Gas Dynamics, RGD24, Bari, イタリア, 7/10/04. https://doi.org/10.1063/1.1941669
Niimi T, Mori H, Akiyama I, Tsuzuki T. Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI. : RAREFIED GAS DYNAMICS: 24th International Symposium on Rarefied Gas Dynamics, RGD24. 2005. p. 1025-1030. (AIP Conference Proceedings). https://doi.org/10.1063/1.1941669
Niimi, Tomohide ; Mori, Hideo ; Akiyama, Isao ; Tsuzuki, Takumi. / Experimental study of rotational nonequilibrium in low density N 2 jets using REMPI. RAREFIED GAS DYNAMICS: 24th International Symposium on Rarefied Gas Dynamics, RGD24. 2005. pp. 1025-1030 (AIP Conference Proceedings).
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