Spectroscopic measurement of atomic hydrogen level populations and hydrogen dissociation degree in expanding cascaded arc plasmas

D.K. Otorbaev; A.J.M. Buuron; N.T. Guerassimov; M.C.M. Sanden, van de; D.C. Schram

doi:10.1063/1.357281

Spectroscopic measurement of atomic hydrogen level populations and hydrogen dissociation degree in expanding cascaded arc plasmas

D.K. Otorbaev, A.J.M. Buuron, N.T. Guerassimov, M.C.M. Sanden, van de, D.C. Schram

Plasma & Materials Processing

Research output: Contribution to journal › Article › Academic › peer-review

33 Citations (Scopus)

131 Downloads (Pure)

Abstract

Optical absorption spectroscopy has been applied to measure the absolute population densities of the first excited levels of atomic hydrogen H*(n=2) and argon Ar*(4s) in an expanding cascaded arc plasma in hydrogen-argon mixture. It is demonstrated that the method allows us to determine both H*(n=2) and Ar*(4s) absolute density radial profiles for H/sub 2/ admixtures in Ar ranging from 0.7% to 10% with good accuracy. The measured H*(n=2) densities are in the 10/sup 14/-10/sup 16/ m/sup -3/ range, and Ar*(4s) densities are in the range of 10/sup 15/-10/sup 18/ m/sup -3/. It has been shown, that the density of hydrogen excited atoms H*(n=2) serves as an indicator of the presence of argon ions and hydrogen molecules in the expanding plasma. A kinetic model is used to understand evolution of H*(n=2) density in the expansion, and to estimate the total atomic hydrogen population density and hydrogen dissociation degree in sub- and supersonic regions of the plasma

Original language	English
Pages (from-to)	4499-4510
Journal	Journal of Applied Physics
Volume	76
Issue number	8
DOIs	https://doi.org/10.1063/1.357281
Publication status	Published - 1994

Access to Document

10.1063/1.357281

588660Final published version, 1.51 MB

Fingerprint Dive into the research topics of 'Spectroscopic measurement of atomic hydrogen level populations and hydrogen dissociation degree in expanding cascaded arc plasmas'. Together they form a unique fingerprint.

Cite this

@article{a24b6564832f4e3087fdd9c0e05f5514,

title = "Spectroscopic measurement of atomic hydrogen level populations and hydrogen dissociation degree in expanding cascaded arc plasmas",

abstract = "Optical absorption spectroscopy has been applied to measure the absolute population densities of the first excited levels of atomic hydrogen H*(n=2) and argon Ar*(4s) in an expanding cascaded arc plasma in hydrogen-argon mixture. It is demonstrated that the method allows us to determine both H*(n=2) and Ar*(4s) absolute density radial profiles for H/sub 2/ admixtures in Ar ranging from 0.7% to 10% with good accuracy. The measured H*(n=2) densities are in the 10/sup 14/-10/sup 16/ m/sup -3/ range, and Ar*(4s) densities are in the range of 10/sup 15/-10/sup 18/ m/sup -3/. It has been shown, that the density of hydrogen excited atoms H*(n=2) serves as an indicator of the presence of argon ions and hydrogen molecules in the expanding plasma. A kinetic model is used to understand evolution of H*(n=2) density in the expansion, and to estimate the total atomic hydrogen population density and hydrogen dissociation degree in sub- and supersonic regions of the plasma",

author = "D.K. Otorbaev and A.J.M. Buuron and N.T. Guerassimov and {Sanden, van de}, M.C.M. and D.C. Schram",

year = "1994",

doi = "10.1063/1.357281",

language = "English",

volume = "76",

pages = "4499--4510",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "8",

}

TY - JOUR

T1 - Spectroscopic measurement of atomic hydrogen level populations and hydrogen dissociation degree in expanding cascaded arc plasmas

AU - Otorbaev, D.K.

AU - Buuron, A.J.M.

AU - Guerassimov, N.T.

AU - Sanden, van de, M.C.M.

AU - Schram, D.C.

PY - 1994

Y1 - 1994

N2 - Optical absorption spectroscopy has been applied to measure the absolute population densities of the first excited levels of atomic hydrogen H*(n=2) and argon Ar*(4s) in an expanding cascaded arc plasma in hydrogen-argon mixture. It is demonstrated that the method allows us to determine both H*(n=2) and Ar*(4s) absolute density radial profiles for H/sub 2/ admixtures in Ar ranging from 0.7% to 10% with good accuracy. The measured H*(n=2) densities are in the 10/sup 14/-10/sup 16/ m/sup -3/ range, and Ar*(4s) densities are in the range of 10/sup 15/-10/sup 18/ m/sup -3/. It has been shown, that the density of hydrogen excited atoms H*(n=2) serves as an indicator of the presence of argon ions and hydrogen molecules in the expanding plasma. A kinetic model is used to understand evolution of H*(n=2) density in the expansion, and to estimate the total atomic hydrogen population density and hydrogen dissociation degree in sub- and supersonic regions of the plasma

AB - Optical absorption spectroscopy has been applied to measure the absolute population densities of the first excited levels of atomic hydrogen H*(n=2) and argon Ar*(4s) in an expanding cascaded arc plasma in hydrogen-argon mixture. It is demonstrated that the method allows us to determine both H*(n=2) and Ar*(4s) absolute density radial profiles for H/sub 2/ admixtures in Ar ranging from 0.7% to 10% with good accuracy. The measured H*(n=2) densities are in the 10/sup 14/-10/sup 16/ m/sup -3/ range, and Ar*(4s) densities are in the range of 10/sup 15/-10/sup 18/ m/sup -3/. It has been shown, that the density of hydrogen excited atoms H*(n=2) serves as an indicator of the presence of argon ions and hydrogen molecules in the expanding plasma. A kinetic model is used to understand evolution of H*(n=2) density in the expansion, and to estimate the total atomic hydrogen population density and hydrogen dissociation degree in sub- and supersonic regions of the plasma

U2 - 10.1063/1.357281

DO - 10.1063/1.357281

M3 - Article

VL - 76

SP - 4499

EP - 4510

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 8

ER -