Investigation on electromagnetic field refraction of inhomogeneous plasma cylinder

2014 ◽  
Vol 81 (2) ◽  
Author(s):  
Yuan ZhongCai ◽  
Shi JiaMing ◽  
Wang JiaChun ◽  
Zhao DaPeng
Keyword(s):  
Electric Field Distribution ◽  
Collision Frequency ◽  
Inhomogeneous Plasma ◽  
Scattering Matrix ◽  
Transverse Magnetic ◽  
Plasma Electron ◽  
Plasma Cylinder ◽  
Nonuniform Plasma ◽  
Scattering Field ◽  
Plasma Electron Density

The interaction between incident transverse magnetic (TM) waves and nonuniform plasma cylinder is investigated. The forward and backscattering fields of incident TM microwave are calculated and analyzed by using the scattering matrix model. The dependences of the scattering field on plasma electron density, collision frequency, and incident frequency are analyzed, respectively. The electric field distribution across the section of the plasma cylinder is deduced, visually shown, and discussed.

Reflection of Conductive Plane Covered by Double Inhomogeneous Plasma Slab

2012 ◽  
Vol 229-231 ◽  
pp. 941-944
Author(s):  
Fei Yan ◽  
Zhong Cai Yuan ◽  
Yong Wang ◽  
Shi Lian Gong ◽  
Zheng Li
Keyword(s):  
Functional Dependence ◽  
Inhomogeneous Plasma ◽  
Plasma Electron ◽  
Reflection Coefficients ◽  
Frequency Range ◽  
Wide Range ◽  
Plasma Slab ◽  
Electromagnetic Signals ◽  
Set Up ◽  
Plasma Electron Density

This paper presents numerical results in the form of graphs of the power reflection coefficients for electromagnetic signals normally incident upon a conductive plane covered with two layers of inhomogeneous plasma slabs. The plasma electron density varies only in the direction perpendicular to the plane. Parameters considered in the computation cover a relatively wide range and the functional dependence of the power reflection coefficients on these parameters is studied. The results indicate that in a rather broad frequency range, the electromagnetic attenuations by the double slabs obviously excel the sum of attenuations resulted from two plasma layers when each layer exits respectively. The structure presented is easy to set up, which is instructive for plasma stealth.

Electro-physical property of plasma jet generated by burning chemicals as antenna

2012 ◽  
Vol 79 (1) ◽  
pp. 51-54 ◽  
Author(s):  
YUAN ZHONG-CAI ◽  
SHI JIA-MING ◽  
WU XIAO-PO ◽  
CHEN ZONG-SHEN
Keyword(s):  
Microwave Radiation ◽  
Electron Concentration ◽  
Collision Frequency ◽  
Physical Property ◽  
Plasma Jet ◽  
Plasma Electron ◽  
Pulsed Power ◽  
Far Field ◽  
Significant Area ◽  
Plasma Electron Density

AbstractThe application of pulsed power to transient radiofrequency/microwave radiation for warhead/projectile payloads is currently a significant area of research. In this paper, the far-field radiative property of a plasma antenna is analyzed. Then, a plasma jet is generated by burning chemicals, in which the electron concentration and collision frequency are diagnosed, and the electric conductance is calculated. Finally, the feasibility to apply the plasma jet as antenna is investigated by analyzing the radiative pattern. The dependency of pattern on plasma electron density, collision frequency, and plasma wake radius is calculated and analyzed.

Design and implementation of plasma electron density measurements based on FPGA with all-phase FFT for tokamak devices

2021 ◽  
Vol 92 (9) ◽  
pp. 093507
Author(s):  
Shuangbao Shu ◽  
Jin Lai ◽  
Zhiqiang Chen ◽  
Yong Wang ◽  
Yuzhong Zhang ◽  
...  
Keyword(s):  
Electron Density ◽  
Plasma Electron ◽  
Density Measurements ◽  
Design And Implementation ◽  
Plasma Electron Density

scholarly journals PARAMETERS OF HYDROGEN PLASMA STREAMS IN QSPA-M AND THEIR DEPENDENCE ON EXTERNAL MAGNETIC FIELD

2021 ◽  
pp. 61-64
Author(s):  
M.S. Ladygina ◽  
Yu.V. Petrov ◽  
D.V. Yeliseev ◽  
V.A. Makhlai ◽  
N.V. Kulik ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Density ◽  
Hydrogen Plasma ◽  
Experimental Studies ◽  
Optical Emission ◽  
Plasma Electron ◽  
Plasma Stream ◽  
Visible Radiation ◽  
Order Of Magnitude ◽  
Plasma Electron Density

Present experimental studies are aimed at analysis of hydrogen plasma stream parameters in various working regimes of QSPA-M operation. Temporal distributions of plasma electron density are reconstructed with optical emission spectroscopy. The magnetic field influence on plasma streams parameters is analyzed. It is shown that in regimes with additional magnetic field the plasma electron density increases by an order of magnitude in comparison with a density value without magnetic field. The plasma velocity and energy density parameters as well as their temporal behaviors were estimatedin different operating regimes of QSPA-M facility. Features of plasma visible radiation were analyzed. This information is important for QSPA-M applications in experiments on interaction of powerful plasma streams with material surfaces.

Investigation on Plasma Electron Density Distribution with Finite Holographic Interferometry

2015 ◽  
Vol 42 (1) ◽  
pp. 0102008
Author(s):  
雷岚 Lei Lan ◽  
曹娜 Cao Na ◽  
曹亮 Cao Liang ◽  
徐青 Xu Qing ◽  
韩长材 Han Changcai ◽  
...  
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Holographic Interferometry ◽  
Electron Density Distribution ◽  
Plasma Electron ◽  
Plasma Electron Density

scholarly journals Non-adiabatic cluster expansion after ultrashort laser interaction

2008 ◽  
Vol 26 (1) ◽  
pp. 69-82 ◽  
Author(s):  
A.Ya. Faenov ◽  
A.I. Magunov ◽  
T.A. Pikuz ◽  
I.Yu. Skobelev ◽  
D. Giulietti ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Cluster Expansion ◽  
Plasma Electron ◽  
Laser Interaction ◽  
Homogeneous Plasma ◽  
X Ray ◽  
Rydberg Transitions ◽  
Ultrashort Laser ◽  
Pulse Contrast ◽  
Plasma Electron Density

AbstractWe used X-ray spectroscopy as a diagnostic tool for investigating the properties of laser-cluster interactions at the stage in which non-adiabatic cluster expansion takes place and a quasi-homogeneous plasma is produced. The experiment was carried out with a 10 TW, 65 fs Ti:Sa laser focused on CO2 cluster jets. The effect of different laser-pulse contrast ratios and cluster concentrations was investigated. The X-ray emission associated to the Rydberg transitions allowed us to retrieve, through the density and temperature of the emitting plasma, the time after the beginning of the interaction at which the emission occurred. The comparison of this value with the estimated time for the “homogeneous” plasma formation shows that the degree of adiabaticity depends on both the cluster concentration and the pulse contrast. Interferometric measurements support the X-ray data concerning the plasma electron density.

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