Attenuation of single-tone ultrasound by an atmospheric glow discharge plasma barrier

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3475510· OSTI ID:21476442

Stepaniuk, Vadim P ^[1]; Ioppolo, Tindaro; Oetuegen, M Volkan ^[2]; Sheverev, Valery A ^[1]

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1. Lenterra Inc., 7 Tenney Road, West Orange, New Jersey 07052 (United States)
2. Southern Methodist University, 3101 Dyer Street, Dallas, Texas 75205 (United States)

Propagation of 143 kHz ultrasound through an atmospheric pressure glow discharge in air was studied experimentally. The plasma was a continuous dc discharge formed by a multipin electrode system. Distributions of the gas temperature were also obtained in and around the plasma using laser-induced Rayleigh scattering technique. Results show significant attenuation of the ultrasound by the glow discharge plasma barrier (up to -24 dB). The results indicate that sound attenuation does not depend on the thickness of the plasma and attenuation is caused primarily by reflection of the sound waves from the plasma due to the sharp gas temperatures gradients that form at the plasma boundary. These gradients can be as high as 80 K/mm.

• OSTI ID: 21476442
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 5; Other Information: DOI: 10.1063/1.3475510; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATMOSPHERIC PRESSURE
ATTENUATION
BOUNDARY LAYERS
ELECTRODES
GLOW DISCHARGES
KHZ RANGE
LASERS
PLASMA
PLASMA DIAGNOSTICS
PLASMA WAVES
RAYLEIGH SCATTERING
REFLECTION
SOUND WAVES
TEMPERATURE GRADIENTS
COHERENT SCATTERING
ELECTRIC DISCHARGES
FREQUENCY RANGE
LAYERS
SCATTERING