Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows

Hideo Mori, Toshihiko Ishida, Yoshinori Aoki, Tomohide Niimi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A measurement technique of thermodynamic variables with high sensitivity is strongly demanded for analyses of highly rarefied gas flows. REMPI (Resonantly Enhanced Multiphoton Ionization) is a powerful optical tool because of its high sensitivity even in highly rarefied gas flows and ability to measure nonequilibrium among internal (translational, vibrational, and rotational) energy. In this study, to investigate fundamental properties of REMPI signal, the experimental apparatus of 2R N2-REMPI is constructed and the REMPI spectra are measured along the center line of a free molecular jet. A method of Boltzmann plot using the spectral lines of both O and P branches is proposed, determining electronic transition dipole moments in Hönl-London factors experimentally from the relative line strength of O and P branches. Then an effect of an experimental noise on a rotational temperature measured by the Boltzmann plot becomes smaller because the number of the lines used for the plot increases. By using the factors, simulated spectra agree well with experimental ones, suggesting feasibility of rotational temperature measurement by a spectral fitting.

Original languageEnglish
Title of host publicationRarefied Gas Dynamics
Subtitle of host publication22nd International Symposium
EditorsTimothy J. Bartel, Michael A. Gallis
PublisherAmerican Institute of Physics Inc.
Pages956-963
Number of pages8
ISBN (Electronic)0735400253
DOIs
Publication statusPublished - Aug 30 2001
Externally publishedYes
Event22nd International Symposium on Rarefied Gas Dynamics - Sydney, Australia
Duration: Jul 9 2000Jul 14 2000

Publication series

NameAIP Conference Proceedings
Volume585
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other22nd International Symposium on Rarefied Gas Dynamics
CountryAustralia
CitySydney
Period7/9/007/14/00

Fingerprint

rarefied gases
gas flow
temperature measurement
ionization
plots
sensitivity
line spectra
dipole moments
thermodynamics
electronics
temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Mori, H., Ishida, T., Aoki, Y., & Niimi, T. (2001). Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows. In T. J. Bartel, & M. A. Gallis (Eds.), Rarefied Gas Dynamics: 22nd International Symposium (pp. 956-963). (AIP Conference Proceedings; Vol. 585). American Institute of Physics Inc.. https://doi.org/10.1063/1.1407662

Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows. / Mori, Hideo; Ishida, Toshihiko; Aoki, Yoshinori; Niimi, Tomohide.

Rarefied Gas Dynamics: 22nd International Symposium. ed. / Timothy J. Bartel; Michael A. Gallis. American Institute of Physics Inc., 2001. p. 956-963 (AIP Conference Proceedings; Vol. 585).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mori, H, Ishida, T, Aoki, Y & Niimi, T 2001, Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows. in TJ Bartel & MA Gallis (eds), Rarefied Gas Dynamics: 22nd International Symposium. AIP Conference Proceedings, vol. 585, American Institute of Physics Inc., pp. 956-963, 22nd International Symposium on Rarefied Gas Dynamics, Sydney, Australia, 7/9/00. https://doi.org/10.1063/1.1407662
Mori H, Ishida T, Aoki Y, Niimi T. Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows. In Bartel TJ, Gallis MA, editors, Rarefied Gas Dynamics: 22nd International Symposium. American Institute of Physics Inc. 2001. p. 956-963. (AIP Conference Proceedings). https://doi.org/10.1063/1.1407662
Mori, Hideo ; Ishida, Toshihiko ; Aoki, Yoshinori ; Niimi, Tomohide. / Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows. Rarefied Gas Dynamics: 22nd International Symposium. editor / Timothy J. Bartel ; Michael A. Gallis. American Institute of Physics Inc., 2001. pp. 956-963 (AIP Conference Proceedings).
@inproceedings{c3bd84c74d8d40ed8b757734ff3e34d1,
title = "Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows",
abstract = "A measurement technique of thermodynamic variables with high sensitivity is strongly demanded for analyses of highly rarefied gas flows. REMPI (Resonantly Enhanced Multiphoton Ionization) is a powerful optical tool because of its high sensitivity even in highly rarefied gas flows and ability to measure nonequilibrium among internal (translational, vibrational, and rotational) energy. In this study, to investigate fundamental properties of REMPI signal, the experimental apparatus of 2R N2-REMPI is constructed and the REMPI spectra are measured along the center line of a free molecular jet. A method of Boltzmann plot using the spectral lines of both O and P branches is proposed, determining electronic transition dipole moments in H{\"o}nl-London factors experimentally from the relative line strength of O and P branches. Then an effect of an experimental noise on a rotational temperature measured by the Boltzmann plot becomes smaller because the number of the lines used for the plot increases. By using the factors, simulated spectra agree well with experimental ones, suggesting feasibility of rotational temperature measurement by a spectral fitting.",
author = "Hideo Mori and Toshihiko Ishida and Yoshinori Aoki and Tomohide Niimi",
year = "2001",
month = "8",
day = "30",
doi = "10.1063/1.1407662",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
pages = "956--963",
editor = "Bartel, {Timothy J.} and Gallis, {Michael A.}",
booktitle = "Rarefied Gas Dynamics",

}

TY - GEN

T1 - Spectroscopic study of REMPI for rotational temperature measurement in highly rarefied gas flows

AU - Mori, Hideo

AU - Ishida, Toshihiko

AU - Aoki, Yoshinori

AU - Niimi, Tomohide

PY - 2001/8/30

Y1 - 2001/8/30

N2 - A measurement technique of thermodynamic variables with high sensitivity is strongly demanded for analyses of highly rarefied gas flows. REMPI (Resonantly Enhanced Multiphoton Ionization) is a powerful optical tool because of its high sensitivity even in highly rarefied gas flows and ability to measure nonequilibrium among internal (translational, vibrational, and rotational) energy. In this study, to investigate fundamental properties of REMPI signal, the experimental apparatus of 2R N2-REMPI is constructed and the REMPI spectra are measured along the center line of a free molecular jet. A method of Boltzmann plot using the spectral lines of both O and P branches is proposed, determining electronic transition dipole moments in Hönl-London factors experimentally from the relative line strength of O and P branches. Then an effect of an experimental noise on a rotational temperature measured by the Boltzmann plot becomes smaller because the number of the lines used for the plot increases. By using the factors, simulated spectra agree well with experimental ones, suggesting feasibility of rotational temperature measurement by a spectral fitting.

AB - A measurement technique of thermodynamic variables with high sensitivity is strongly demanded for analyses of highly rarefied gas flows. REMPI (Resonantly Enhanced Multiphoton Ionization) is a powerful optical tool because of its high sensitivity even in highly rarefied gas flows and ability to measure nonequilibrium among internal (translational, vibrational, and rotational) energy. In this study, to investigate fundamental properties of REMPI signal, the experimental apparatus of 2R N2-REMPI is constructed and the REMPI spectra are measured along the center line of a free molecular jet. A method of Boltzmann plot using the spectral lines of both O and P branches is proposed, determining electronic transition dipole moments in Hönl-London factors experimentally from the relative line strength of O and P branches. Then an effect of an experimental noise on a rotational temperature measured by the Boltzmann plot becomes smaller because the number of the lines used for the plot increases. By using the factors, simulated spectra agree well with experimental ones, suggesting feasibility of rotational temperature measurement by a spectral fitting.

UR - http://www.scopus.com/inward/record.url?scp=84925932671&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84925932671&partnerID=8YFLogxK

U2 - 10.1063/1.1407662

DO - 10.1063/1.1407662

M3 - Conference contribution

AN - SCOPUS:84925932671

T3 - AIP Conference Proceedings

SP - 956

EP - 963

BT - Rarefied Gas Dynamics

A2 - Bartel, Timothy J.

A2 - Gallis, Michael A.

PB - American Institute of Physics Inc.

ER -