Abstract
Results of a numerical evaluation of the electrical conductivity in high-pressure plasmas of intermediate degrees of ionization formed in xenon with, respectively, 1% and 10% of sodium are presented, for temperatures between 2000 K and 20 000 K, and for pressures ranging from the normal atmospheric value p{sub atm} = 0.1 MPa up to 2.5 MPa. The equilibrium plasma composition, necessary for the evaluations, was determined on the ground of the Saha equations combined with the charge conservation relation and the assumption that the pressure remained constant in the course of temperature variations. The ionization energy lowering, required in conjunction with the Saha equations, was obtained with the aid of a modified expression for the plasma Debye radius proposed previously. The electron elastic collisions with the charged particles were described by the Spitzer-Haerm (or, rather, Rutherford) formula, and those with the neutrals were taken into account by a polynomial formula interpolating some selected experimental results. The evaluated electrical conductivity is found to increase with the pressure at fixed temperature (except in the mixture with 10% of sodium, in which case an indistinct maximum at p = 10 p{sub atm} can be seen for 6000 K). This feature is opposite to
More>>
Novakovic, N V;
[1]
Stojilkovic, S M;
[2]
Milic, B S
[3]
- Faculty of Philosophy, Nis (Yugoslavia)
- Faculty of Electronics, Nis (Yugoslavia)
- Dept. of Physics and Meteorology, Faculty of Natural and Mathematical Sciences, Belgrade (Yugoslavia)
Citation Formats
Novakovic, N V, Stojilkovic, S M, and Milic, B S.
Evaluation of electrical conductivity in high-pressure plasmas formed in xenon with sodium as additive.
Sweden: N. p.,
1990.
Web.
doi:10.1088/0031-8949/41/2/013.
Novakovic, N V, Stojilkovic, S M, & Milic, B S.
Evaluation of electrical conductivity in high-pressure plasmas formed in xenon with sodium as additive.
Sweden.
https://doi.org/10.1088/0031-8949/41/2/013
Novakovic, N V, Stojilkovic, S M, and Milic, B S.
1990.
"Evaluation of electrical conductivity in high-pressure plasmas formed in xenon with sodium as additive."
Sweden.
https://doi.org/10.1088/0031-8949/41/2/013.
@misc{etde_6824718,
title = {Evaluation of electrical conductivity in high-pressure plasmas formed in xenon with sodium as additive}
author = {Novakovic, N V, Stojilkovic, S M, and Milic, B S}
abstractNote = {Results of a numerical evaluation of the electrical conductivity in high-pressure plasmas of intermediate degrees of ionization formed in xenon with, respectively, 1% and 10% of sodium are presented, for temperatures between 2000 K and 20 000 K, and for pressures ranging from the normal atmospheric value p{sub atm} = 0.1 MPa up to 2.5 MPa. The equilibrium plasma composition, necessary for the evaluations, was determined on the ground of the Saha equations combined with the charge conservation relation and the assumption that the pressure remained constant in the course of temperature variations. The ionization energy lowering, required in conjunction with the Saha equations, was obtained with the aid of a modified expression for the plasma Debye radius proposed previously. The electron elastic collisions with the charged particles were described by the Spitzer-Haerm (or, rather, Rutherford) formula, and those with the neutrals were taken into account by a polynomial formula interpolating some selected experimental results. The evaluated electrical conductivity is found to increase with the pressure at fixed temperature (except in the mixture with 10% of sodium, in which case an indistinct maximum at p = 10 p{sub atm} can be seen for 6000 K). This feature is opposite to what is found in pure xenon plasma and, except in the upper part of the temperature range analysed, agrees well with the behaviour of pure alkaline vapours. The numerical values obtained for the electrical conductivity are smaller than the figures resulting from the approximate formulae commonly used in numerical estimates of this transport coefficient in moderately non-ideal plasmas of intermediate degrees of ionization, much in accordance with the trends suggested by the experiment. (orig.).}
doi = {10.1088/0031-8949/41/2/013}
journal = []
volume = {41:2}
journal type = {AC}
place = {Sweden}
year = {1990}
month = {Feb}
}
title = {Evaluation of electrical conductivity in high-pressure plasmas formed in xenon with sodium as additive}
author = {Novakovic, N V, Stojilkovic, S M, and Milic, B S}
abstractNote = {Results of a numerical evaluation of the electrical conductivity in high-pressure plasmas of intermediate degrees of ionization formed in xenon with, respectively, 1% and 10% of sodium are presented, for temperatures between 2000 K and 20 000 K, and for pressures ranging from the normal atmospheric value p{sub atm} = 0.1 MPa up to 2.5 MPa. The equilibrium plasma composition, necessary for the evaluations, was determined on the ground of the Saha equations combined with the charge conservation relation and the assumption that the pressure remained constant in the course of temperature variations. The ionization energy lowering, required in conjunction with the Saha equations, was obtained with the aid of a modified expression for the plasma Debye radius proposed previously. The electron elastic collisions with the charged particles were described by the Spitzer-Haerm (or, rather, Rutherford) formula, and those with the neutrals were taken into account by a polynomial formula interpolating some selected experimental results. The evaluated electrical conductivity is found to increase with the pressure at fixed temperature (except in the mixture with 10% of sodium, in which case an indistinct maximum at p = 10 p{sub atm} can be seen for 6000 K). This feature is opposite to what is found in pure xenon plasma and, except in the upper part of the temperature range analysed, agrees well with the behaviour of pure alkaline vapours. The numerical values obtained for the electrical conductivity are smaller than the figures resulting from the approximate formulae commonly used in numerical estimates of this transport coefficient in moderately non-ideal plasmas of intermediate degrees of ionization, much in accordance with the trends suggested by the experiment. (orig.).}
doi = {10.1088/0031-8949/41/2/013}
journal = []
volume = {41:2}
journal type = {AC}
place = {Sweden}
year = {1990}
month = {Feb}
}