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Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes

Publish Year: 1402
Type: Journal paper
Language: English
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JR_JORNA-3-3_005

Index date: 6 September 2023

Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes abstract

Many remote diagnostics systems rely on transmission and reflection of electromagnetic waves. In diagnostics facilities such as microwave reflectometers which operate in the cut-off frequency range, collisionality of the plasma can affect the transmission and reflection characteristics of the electromagnetic wave. In this paper, plasma mismatching and reflection properties of microwave propagation through partially ionized, uniform, and cold plasma were studied. Using the simplified Lorentz model of the plasma and associated dispersion relation of electromagnetic wave propagation through collisional, cold plasma, propagation characteristics of the electromagnetic waves were investigated in different collisional regimes of single-interface and double-interface, bounded plasma. It was found that in the cut-off frequency range, the propagation coefficients of the electromagnetic wave can be significantly affected depending on the collision frequency of the plasma. It was also found that in the double-interface case, the thickness of the plasma can cause multiple reflections in the plasma slab, and such reflections can be suppressed in the high-loss collisional regime

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Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes authors

E. Noori

Plasma and nuclear fusion research school, Nuclear Science and Technology Research Institute (NSTRI), P.O. Box:۱۴۳۹۵-۸۳۶, Tehran, Iran

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