Deviation from local thermal equilibrium in an atmospheric argon arc plasma

J. Leclair, D.C. Schram

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

28 Downloads (Pure)

Abstract

The electron temperature T/sub e/ is obtained from five optically non-thin Ar I line-transitions. It is possible to measure T/sub e/ without any knowledge of transition probabilities. The electron density N/sub e/ can be calculated from measured excited level densities using the partial LTE model. It appears that there is a functional dependence of N/sub e/ on T/sub e/, suggesting that transport processes are of only minor importance. The deviations from LTE can be described by assuming a N/sub e/-dependent overpopulation of the ground level of Ar I. This overpopulation factor varies from 1.9 for N/sub e/=2*10/sup 16/ cm/sup -3/ to 1.25 for N/sub e/=2*10/sup 17/ cm/sup -3/
Original languageEnglish
Title of host publicationICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II
Place of PublicationLeipzig, East Germany
PublisherPhys. Soc. German Democratic Republic
Pages483-484
Publication statusPublished - 1977

Fingerprint

local thermodynamic equilibrium
plasma jets
argon
deviation
transition probabilities
electron energy

Cite this

Leclair, J., & Schram, D. C. (1977). Deviation from local thermal equilibrium in an atmospheric argon arc plasma. In ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II (pp. 483-484). Leipzig, East Germany: Phys. Soc. German Democratic Republic.
Leclair, J. ; Schram, D.C. / Deviation from local thermal equilibrium in an atmospheric argon arc plasma. ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II. Leipzig, East Germany : Phys. Soc. German Democratic Republic, 1977. pp. 483-484
@inproceedings{e2ea8374604740ecb7f2ca0151b477c6,
title = "Deviation from local thermal equilibrium in an atmospheric argon arc plasma",
abstract = "The electron temperature T/sub e/ is obtained from five optically non-thin Ar I line-transitions. It is possible to measure T/sub e/ without any knowledge of transition probabilities. The electron density N/sub e/ can be calculated from measured excited level densities using the partial LTE model. It appears that there is a functional dependence of N/sub e/ on T/sub e/, suggesting that transport processes are of only minor importance. The deviations from LTE can be described by assuming a N/sub e/-dependent overpopulation of the ground level of Ar I. This overpopulation factor varies from 1.9 for N/sub e/=2*10/sup 16/ cm/sup -3/ to 1.25 for N/sub e/=2*10/sup 17/ cm/sup -3/",
author = "J. Leclair and D.C. Schram",
year = "1977",
language = "English",
pages = "483--484",
booktitle = "ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II",
publisher = "Phys. Soc. German Democratic Republic",

}

Leclair, J & Schram, DC 1977, Deviation from local thermal equilibrium in an atmospheric argon arc plasma. in ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II. Phys. Soc. German Democratic Republic, Leipzig, East Germany, pp. 483-484.

Deviation from local thermal equilibrium in an atmospheric argon arc plasma. / Leclair, J.; Schram, D.C.

ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II. Leipzig, East Germany : Phys. Soc. German Democratic Republic, 1977. p. 483-484.

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

TY - GEN

T1 - Deviation from local thermal equilibrium in an atmospheric argon arc plasma

AU - Leclair, J.

AU - Schram, D.C.

PY - 1977

Y1 - 1977

N2 - The electron temperature T/sub e/ is obtained from five optically non-thin Ar I line-transitions. It is possible to measure T/sub e/ without any knowledge of transition probabilities. The electron density N/sub e/ can be calculated from measured excited level densities using the partial LTE model. It appears that there is a functional dependence of N/sub e/ on T/sub e/, suggesting that transport processes are of only minor importance. The deviations from LTE can be described by assuming a N/sub e/-dependent overpopulation of the ground level of Ar I. This overpopulation factor varies from 1.9 for N/sub e/=2*10/sup 16/ cm/sup -3/ to 1.25 for N/sub e/=2*10/sup 17/ cm/sup -3/

AB - The electron temperature T/sub e/ is obtained from five optically non-thin Ar I line-transitions. It is possible to measure T/sub e/ without any knowledge of transition probabilities. The electron density N/sub e/ can be calculated from measured excited level densities using the partial LTE model. It appears that there is a functional dependence of N/sub e/ on T/sub e/, suggesting that transport processes are of only minor importance. The deviations from LTE can be described by assuming a N/sub e/-dependent overpopulation of the ground level of Ar I. This overpopulation factor varies from 1.9 for N/sub e/=2*10/sup 16/ cm/sup -3/ to 1.25 for N/sub e/=2*10/sup 17/ cm/sup -3/

M3 - Conference contribution

SP - 483

EP - 484

BT - ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II

PB - Phys. Soc. German Democratic Republic

CY - Leipzig, East Germany

ER -

Leclair J, Schram DC. Deviation from local thermal equilibrium in an atmospheric argon arc plasma. In ICPIG : International Conference on Phenomena in Ionized Gases : proceedings, 13th, Berlin, September 12-17, 1977, contributed papers II. Leipzig, East Germany: Phys. Soc. German Democratic Republic. 1977. p. 483-484