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Recombination, ionization, and nonequilibrium electrical conductivity in seeded plasmas

Cool, Terrill A. and Zukoski, Edward E. (1966) Recombination, ionization, and nonequilibrium electrical conductivity in seeded plasmas. Physics of Fluids, 9 (4). pp. 780-796. ISSN 1070-6631. doi:10.1063/1.1761745.

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New data are presented which provide direct experimental confirmation of the validity of a physical model which has been widely employed to predict the electrical conductivity of dense, two-temperature, seeded plasmas. Experimental measurements of electron temperature, and ionization and recombination rates are presented for partially ionized plasmas of potassium-seeded argon. Experimental conditions were chosen to cover those ranges of interest in connection with proposed magnetohydrodynamic energy conversion devices for which nonequilibrium electrical conductivity measurements have been previously reported, e.g., translational atom temperatures of about 2000°K, total atom densities near 10^(18)/cm^3, potassium densities of about 10^(16)/cm^3, electron densities from 10^(13)/cm^3 to 10^(15)/cm^3, and electron temperatures from 2200 to 3500°K. Measured values of electron-electron-ion recombination coefficients for potassium show good agreement with theoretical values based upon the Gryzinski classical inelastic-collision cross-section expressions. Observed ionization rates and relaxation characteristics appear to be adequately explained by a similar formulation for the ionization process.

Item Type:Article
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Additional Information:© 1966 American Institute of Physics. Received 16 September 1965. Online Publication Date: 9 December 2004. This work was supported by the Air Force Office of Scientific Research primarily under Grant No. AF-AFOSR-160-63, and partially under Contract No. AF 49(638)-1346.
Group:Guggenheim Jet Propulsion Center
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Air Force Office of Scientific Research (AFOSR)AF-AFOSR-160-63
Air Force Office of Scientific Research (AFOSR)AF 49(638)-1346
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Guggenheim Jet Propulsion CenterUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20110103-093330751
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Official Citation:Recombination, Ionization, and Nonequilibrium Electrical Conductivity in Seeded Plasmas Terrill A. Cool and Edward E. Zukoski Phys. Fluids 9, 780 (1966); doi:10.1063/1.1761745 (17 pages)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21527
Deposited By: Ruth Sustaita
Deposited On:04 Jan 2011 18:27
Last Modified:09 Nov 2021 15:57

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