China Research Institute of Radio Wave Propagation CRIRP

Beijing, China

China Research Institute of Radio Wave Propagation CRIRP

Beijing, China
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Li H.,China Research Institute of Radio Wave Propagation CRIRP | Wu J.,China Research Institute of Radio Wave Propagation CRIRP | Shi Y.-X.,Yili Normal University
2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010 | Year: 2010

The microwave signal attenuation pass through the solid rocket exhausts by used the theory of dusty plasma is presented. The self-consistently linear coupling of the dust charge fluctuations process with the plasma collective motion are taken into accout and the kinetic equation are adopted to calculate the complex dielectric permittivity of the weakly ionized dusty plasma. The expressions obtained shows that there are some modifications introduced by the presence dust particle, which is different from the traditional theory of plasma. And then we apply this expression to analyze the attenuation coefficient of the rocket exhaust plume. Numerical result show that the density and radius of the dust particles has greatly influence on the attenuation of the microwave signal, which shows agree well with the experimental measured. ©2010 IEEE.


Li H.,China Research Institute of Radio Wave Propagation CRIRP | Wu J.,China Research Institute of Radio Wave Propagation CRIRP | Xu Z.-W.,China Research Institute of Radio Wave Propagation CRIRP | Xu B.,China Research Institute of Radio Wave Propagation CRIRP
Annales Geophysicae | Year: 2010

Traditional hydrodynamic equations are adopted to build a one-dimensional theoretical model to study the effect of gravity wave on layered dusty plasma structures formation and evolution near the polar summer mesospause region associated with polar mesosphere summer echoes (PMSE). The proposed mechanism gives consideration to the charged ice particle motion by the gravity wave modulation, making a significant contribution to the vertical transport of heavy ice particles and convergence into thin layers. And numerical results show that the pattern of the multi-layer structure depends on the ration of the initial ice particles density distribution to the vertical wavelength of the gravity waves, the ice particle size and the wind velocity caused by gravity wave. Also, the variation of ion density distribution under the influence of gravity wave has also been examined. Finally, the electron density depletions (bite-outs) layers has been simulated according to the charge conservation laws, and the results are compared to the ECT02 rocket sounding data, which agree well with the measuring. © 2010 Author(s).


Li H.,Harbin Institute of Technology | Li H.,China Research Institute of Radio Wave Propagation CRIRP | Wu J.,China Research Institute of Radio Wave Propagation CRIRP | Zhou Z.,Harbin Institute of Technology | Yuan C.,Harbin Institute of Technology
Physics of Plasmas | Year: 2016

The effect of charged dust particle and their size distribution on the propagation of electromagnetic wave in a dusty plasma is investigated. It is shown that the additional collision mechanism provided by charged dust particles can significantly alter the electromagnetic properties of a plasma, leading to the appearance of attenuation of electromagnetic wave through dusty plasma. The attenuation coefficient mainly depends on the dust density, radius, and the charge numbers on the dust surface. The results described here will be used to enhance understanding of electromagnetic wave propagation processed in space and laboratory dusty plasma. © 2016 Author(s).


Li H.,Harbin Institute of Technology | Li H.,China Research Institute of Radio Wave Propagation CRIRP | Wu J.,China Research Institute of Radio Wave Propagation CRIRP | Zhou Z.-X.,Harbin Institute of Technology | And 2 more authors.
Physics of Plasmas | Year: 2016

Using classical Boltzmann kinetic theory, the dielectric function of weakly ionized unmagnetized dusty plasma is derived. The elastic Coulomb collision and inelastic charging collision of electrons with charged dust particle as well as charge variation on dust surface are taken into account. The theoretical result is applied to analyze the propagation of electromagnetic wave in a dusty plasma. It is demonstrated that the additional collision mechanism provided by charged dust particle can significantly increase the absorbed power of electromagnetic wave. These increases are mainly determined by the dust radius, density, and the charge numbers on the dust surface. The obtained results will support an enhanced understanding of the wave propagation processes in space and laboratory dusty plasmas. © 2016 Author(s).


Li H.,Harbin Institute of Technology | Li H.,China Research Institute of Radio Wave Propagation CRIRP | Wu J.,China Research Institute of Radio Wave Propagation CRIRP | Zhou Z.,Harbin Institute of Technology
Annales Geophysicae | Year: 2016

This paper presents a two-dimensional theoretical model to study the formation process of multiple layers of small ice particles in the polar summer mesosphere as measured by rockets and associated with polar mesosphere summer echoes (PMSE). The proposed mechanism primarily takes into account the transport processes induced by gravity waves through collision coupling between the neutral atmosphere and the ice particles. Numerical solutions of the model indicate that the dynamic influence of wind variation induced by gravity waves can make a significant contribution to the vertical and horizontal transport of ice particles and ultimately transform them into thin multiple layers. Additionally, the pattern of the multiple layers at least partially depends on the vertical wavelength of the gravity wave, the ice particle size and the wind velocity. The results presented in this paper will be helpful to better understand the occurrence of multiple layers of PMSE as well as its variation process. © 2016 Author(s).

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