Shock Formation by Plasma Filaments of Microwave Discharge under Atmospheric Pressure

Content Provider	Scilit
Author	Takahashi, Masayuki Ohnishi, Naofumi
Copyright Year	2016
Description	Journal: Journal of Physics: Conference Series A one-dimensional compressible fluid calculation was coupled with a finite- difference time-domain code and a particle-in-cell code with collision to reproduce propagation of electromagnetic wave, ionization process of plasma, and shock wave formation in atmospheric microwave discharge. Plasma filaments are driven toward the microwave source at 1 atm, and the distance between each filament is one-fifth of the wavelength of the incident microwave. The strong shock wave is generated due to the high plasma density at the atmospheric pressure. A simple analysis of the microwave propagation into the plasma shows that cut-off density of the microwave becomes smaller with the pressure decrease in a collisional plasma. At the lower pressure, the smaller density plasma is obtained with a diffusive pattern because of the smaller cut-off density and the larger diffusion effect. In contrast with the 1-atm case, the weak shock wave is generated at a rarefied condition, which lowers performance of microwave thruster.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/688/1/012119/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/688/1/012119
Journal	Journal of Physics: Conference Series
Volume Number	688
Language	English
Publisher	IOP Publishing
Publisher Date	2016-03-31
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Aerospace Engineering Microwave Discharge Plasma Filaments Shock Wave Electromagnetic Wave
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy