Experimental and theoretical study of the microwaves transmission through the plasma structures and layers in a constant magnetic field

31st International Conference on Equations of State for Matter

Bocharov, A.N.^1 ; Bityurin, V.A.^1 ; Brovkin, V.G.^1 ; Vedenin, P.V.^1 ; Petrovskiy, V.P.^1 ; Balakirev, B.A.^2 ; Korneev, V.N.^2 ; Pashchina, A.S.^1 ; Shkatov, O.Yu.^2 ; Pervov, A.Yu.^2

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^1

Open Joint Stock Company Corporation Moscow Institute of Heat Technology, Beryozovaya Avenue 10, Moscow

127273, Russia^2

关键词: Collision frequency;    Constant magnetic fields;    Optimal conditions;    Quasi-neutral plasma;    Theoretical study;    Transmission conditions;    Transmitted waves;    Wavelength ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012155/pdf
DOI  :  10.1088/1742-6596/774/1/012155

来源: IOP

【 摘 要 】

The possibility of significant improvement transmission conditions of microwave radiation passing through a homogeneous quasi-neutral plasma layer in the constant magnetic field B0is considered. The study based on 1D analysis was conducted for layers with concentration Np= 1017-1019m-3and collision frequency of electrons with molecules ν = 1010-1011s-1in the wavelength range λ = 1-10 cm. For different values of plasma parameters Npand ν the dependences of the magnetic induction values B0(λ, α, |D|cr), reducing a transmitted wave amplitude attenuation to a specified level (in this case, |D|cr= 3 dB) were obtained. Analyzed the influence of the angle between vectors B0and k (wave vector) on the amplitude ATand, hence, on the value of B0(λ, α, |D|cr), revealed the optimal conditions of the field B0orientation relative to the direction of electromagnetic waves propagation. Experimentally investigated the influence of a constant magnetic field B0on the attenuation degree of microwave radiation (f = 13 GHz) in a various types plasma structures and in the plasma layers. The experiments were carried out in air at pressures P = 70-500 Torr. A marked increase in the amplitude of the transmitted wave in presence of constant magnetic field was indicated.