Document Type : Original Article
Authors
University of Tabriz
Abstract
In this paper, we investigate the interaction of intense Hermite-Cosh Gaussian laser beams with inhomogeneous plasma then it is calculated the magnetic field of the EM wave via the Maxwell Equation By comparison of them, we investigate the behavior and phase difference between them. The difference phase between the magnetic and electric fields is 90° and is quite obvious. It is observed that the electric field decreases with increasing wavelength but the magnetic field increases. Simulations with FDTD of the distribution of magnetic and electric fields in plasma, plot the related diagrams and then compare them together. Because high-power lasers cause nonlinear effects on the plasma that lead to the Ponderomotive force, the behavior resulting from this force was investigated. The results of the transmission and reflection of the laser in plasma diagrams show high transmission and less reflection. The interaction of electromagnetic waves (lasers) with plasma is important because of its applications in plasma accelerators, X-ray production, laser fusion, and the generation of nonlinear effects such as ponderomotive force, which leads to accelerated plasma electrons. The results show that variable-density plasmas have better absorption than homogeneous plasmas in terms of wavelength. It can be seen that the transmission rate of UV rays in plasma is higher than the rate of reflection. Due to the fact that this paper studies high-power lasers, to achieve such results in the laboratory,
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