Diffusion of atomic hydrogen in an atmospheric-pressure free-burning arc discharge

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.52.2999· OSTI ID:115989

Snyder, S C; Murphy, A B; Hofeldt, D L; Reynolds, L D ^[1]

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1. Idaho National Engineering Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415 (United States)

Relative radial concentration profiles of atomic hydrogen in an atmospheric-pressure argon-hydrogen free-burning 200-A arc discharge were measured using laser-induced fluorescence by two-photon excitation of the ground state of atomic hydrogen. Radial profiles are presented for three axial locations. A comparison between the measured profiles and profiles calculated using a diffusion model that considers demixing processes is made. The measured profiles decrease less rapidly with increasing radius than the calculated profiles, suggesting, in agreement with calculations, that the diffusion rate of atomic hydrogen is greater than the recombination rate. Consequently, local chemical equilibrium is not maintained at larger radii in the arc.

• OSTI ID: 115989
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 3 Vol. 52; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON
ATOMS
DIFFUSION
DISTRIBUTION
ELECTRIC ARCS
FLOW MODELS
FLUORESCENCE
HYDROGEN
KINETICS
NON-EQUILIBRIUM PLASMA
PROBES