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Characterization of a CO2/N2/Ar supersonic flowing discharge

J. Appl. Phys. 106, 083305 (2009); doi:10.1063/1.3246870

Published 28 October 2009

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D. J. Drake, S. Popović, and L. Vušković
Department of Physics, Old Dominion University, 4600 Elkhorn Ave., Norfolk, Virginia 23529, USA
In this paper we are presenting the full characterization of a supersonic flowing CO2/N2/Ar discharge at static pressures of 1–20 Torr and Mach number 2.15. In all aspects besides the flow speed and gas temperature, these conditions correspond to Martian entry plasma. Plasma parameters were determined by optical emission spectroscopy techniques. The gas and vibrational temperature were found from analysis of the rotational and vibrational spectra of the CO B 1Sigma+−A 1Pi Ångstrom system, respectively. The electron density was determined from the absolute intensity of the N2 C 3Piu−B 3Pig second positive system. A kinetic model for the discharge was developed to calculate the electron density and compared with experimental data. ©2009 American Institute of Physics
History: Received 29 July 2009; accepted 14 September 2009; published 28 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083305/1
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0021-8979 (print)   1089-7550 (online)
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