共查询到20条相似文献,搜索用时 15 毫秒
1.
Two-dimensional relativistic electromagnetic dromion-like soliton in a cold transparent plasma
下载免费PDF全文
![点击此处可从《中国物理》网站下载免费的PDF全文](/ch/ext_images/free.gif)
By using a standard multiple scale method, a Davey--Stewartson (DS) equation
has been derived and also applied to a multi-dimensional analytical
investigation on the interaction of an ultra-intense laser pulse with a cold
unmagnetized transparent electron-ion plasma. The regions of instability are
found by considering the modulation instability of a plane wave solution of
the DS equation. The DS equation is just of the Davey--Stewartson 1 (DS1) type
and admits a dromion solution, i.e. a two-dimensional (2D) dromion soliton
decaying exponentially in all spatial directions. A 2D relativistic
electromagnetic dromion-like soliton (2D REDLS) is derived for a vector
potential. 相似文献
2.
3.
We propose a general method to derive kinetic equations for dense soliton gases in physical systems described by integrable nonlinear wave equations. The kinetic equation describes evolution of the spectral distribution function of solitons due to soliton-soliton collisions. Owing to complete integrability of the soliton equations, only pairwise soliton interactions contribute to the solution, and the evolution reduces to a transport of the eigenvalues of the associated spectral problem with the corresponding soliton velocities modified by the collisions. The proposed general procedure of the derivation of the kinetic equation is illustrated by the examples of the Korteweg-de Vries and nonlinear Schr?dinger (NLS) equations. As a simple physical example, we construct an explicit solution for the case of interaction of two cold NLS soliton gases. 相似文献
4.
The interaction of an intense circularly polarized laser pulse with a layer of plasma of supercritical density is studied. The nonlinear skin effect for the electromagnetic field and the coefficient of collisionless absorption of the laser pulse were calculated analytically. It is shown that, in the process of interaction with the plasma, the laser pulse generates solitons propagating through the plasma layer and transferring the radiation through the opaque medium. The coefficient of transparency of the plasma layer for the soliton-like penetration of the laser radiation was calculated. The plasma parameters at which the collisionless absorption is small as compared to the transformation of the laser energy into solitons were found. 相似文献
5.
High-speed soliton transmission in dense periodic fibers 总被引:1,自引:0,他引:1
An 80-Gbit/s soliton can be transmitted over a cross-Pacific distance in a dense periodic fiber, even in the presence of higher-order effects. Such a dense dispersion-managed soliton is generally more stable and faces fewer mutual interactions than a conventional dispersion-managed soliton. 相似文献
6.
7.
Resonant interaction at oblique incidence of an electromagnetic wave on an inhomogeneous plasma slab is studied. The time evolution of this interaction is solved numerically from two-fluid equations, adiabatic equation for electron pressure and from Maxwell equations. It is shown that the electromagnetic energy of an incident wave is transformed both into the heat energy and into the energy of plasma oscillations in the direction of density gradient. The distribution of the transformed energy between the heat energy and the energy of plasma oscillations is strongly dependent on the plasma temperature. The ratio of heat energy to the energy of plasma oscillations is growing with growing temperature. The plasma oscillations are generated by magnetic induction of the penetrating wave. In a cold plasma they are generated especially in the overdense region and their frequency is equal to local plasma frequency. The electric field in the direction of plasma gradient has a form of a wave packet whose envelope reaches a maximum at resonance. The characteristic wavelength in the wave packet decreases and the amplitude of the packet increases with the time. 相似文献
8.
This paper reviews recent laboratory experiments on ion acoustic solitons that are excited, propagate, and interact in a plasma. The solitons can be described with the Korteweg–deVries (KdV) equation, the modified Korteweg–deVries (mKdV) equation, or the Kadomtsev–Petviashvilli (KP) equation. The results should be applicable in non- linear optics experiments. 相似文献
9.
10.
《Physics letters. A》1987,125(1):35-40
The NLSE soliton scattering by impurities is considered in the framework of the one-dimensional model. The scattering intensity is characterized by the reflection coefficient of the soliton is calculated in the Born approximation of the perturbation theory for the following cases: (i) and isolated impurity, (ii) two point impurities, and (iii) a regular or random system of point impurities. An analytical comparison with the scattering of linear waves is carried out. In particular, we analytically describe the nonlinear resonant scattering by two point impurities, and the non-resonant soliton scattering by a random system of point impurities. 相似文献
11.
12.
13.
Journal of Applied Spectroscopy - 相似文献
14.
15.
16.
Cooney I.L. Gavin M.T. Tao I. Lonngren K.E. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1991,19(6):1259-1266
The authors describe a series of experiments performed in a positive ion-negative ion plasma that were designed to study the reflection and focusing properties of solitons. The nonlinear wave was compared with a theoretical model using linear waves. The two-dimensional soliton was created by reflecting an incident planar soliton from a concave hemispherical surface. The experimental results are interpreted in terms of the linear waves that can exist in a focused Fabry-Perot resonator 相似文献
17.
Riley D Woolsey NC McSherry D Weaver I Djaoui A Nardi E 《Physical review letters》2000,84(8):1704-1707
We report measurements of x-ray scattering cross sections for dense plasmas created by subjecting aluminum foils to strong laser-driven shocks. A narrow cone of quasimonochromatic x-rays at approximately 4.75 keV was used to probe the shocked part of the foil and scattered photons were detected with a CCD camera. The scattering cross section shows a clear peak, indicating diffraction from the plasma. Analysis and simulation of the data suggest that radiative heating and electron-ion energy exchange are important factors in the plasma production. 相似文献
18.
Summary The Korteweg-de Vries equation for ion acoustic waves in the presence of weakly relativistic ion streaming velocity is derived
in a magnetic plasma. It is found that relativistic effects are important in the solitary wave propagation for both fast and
slow modes. Earlier results are reconfirmed.
To speed up publication, the authors of this paper have agreed to not receive the proofs for correction. 相似文献
19.
A two-dimensional electron structure in a system with a periodic potential, i.e., a two-dimensional superlattice, is investigated.
An equation is derived describing the propagation of an electromagnetic wave in a two-dimensional superlattice. It is shown
that an electromagnetic soliton can propagate in a two-dimensional superlattice, where it is detectable experimentally because
it can induce a pulsed entrainment current. The influence of an elliptically polarized (specified) electromagnetic wave on
the form of the soliton is also investigated. It is shown that a solitary wave can be amplified under certain conditions.
Fiz. Tverd. Tela (St. Petersburg) 39, 1470–1472 (August 1997) 相似文献
20.