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Tuesday, July 14, 2020 | History

2 edition of Self-trapping and self-focusing of electromagnetic waves in a plasma. found in the catalog.

Self-trapping and self-focusing of electromagnetic waves in a plasma.

Kristian Barstad Dysthe

Self-trapping and self-focusing of electromagnetic waves in a plasma.

by Kristian Barstad Dysthe

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  • 2 Currently reading

Published by Dept. of Applied Mathematics, University of Bergen in Bergen .
Written in English

    Subjects:
  • Electromagnetic waves.,
  • Plasma stability.

  • Edition Notes

    SeriesUniversitetet i Bergen. Matematisk institutt. Report 14
    Classifications
    LC ClassificationsQA801 .B4 no. 14
    The Physical Object
    Pagination25, [9] l.
    Number of Pages25
    ID Numbers
    Open LibraryOL5729492M
    LC Control Number70503102

    The material has an intensity-dependent refractive index. At the center of the beam, the refractive index is the largest. The induced refractive index profile counteracts diffraction and actually focuses the beam. Self-focusing is important in the design of high-power laser systems. The model demonstrates 3D nonlinear wave propagation. Self-focusing is a non-linear optical process induced by the change in refractive index of materials exposed to intense electromagnetic radiation. A medium whose refractive index increases with the electric field intensity acts as a focusing lens for an electromagnetic wave characterised by an initial transverse intensity gradient, as in a laser beam. The peak intensity of the self-focused.

    Title: Observation of Self-focusing of Electromagnetic Waves in a Plasma: Authors: Eremin, B. G.; Litvak, A. G. Publication: ZhETF Pis ma Redaktsiiu, Vol. 13, p For a medium with a third-order optical nonlinearity, with n(x, y) = n 0 + n 2 I(x, y), where n 0 is the field-free refractive index, n 2 is the nonlinear refractive index, and I(x, y) is the field intensity profile, this nonlinear Schrödinger equation (NSE) describes nonlinear self-action effects [15, 16], including the self-focusing of a laser beam as a whole and beam breakup due to.

    The paper is concerned with the focusing of nonlinear seismic waves in elastic media with couple stresses. When the waves are described by the linear theory a defocusing at the propagation is observed, in other words, the original plane front of waves transforms to a convex-spherical form. Electromagnetic waves in magnetized plasma The dispersion relation Bruno Despr es (LJLL-UPMC) Electromagnetic waves in magnetized plasma The dispersion relation p. 1 /


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Self-trapping and self-focusing of electromagnetic waves in a plasma by Kristian Barstad Dysthe Download PDF EPUB FB2

The self-action effects of electromagnetic waves in a plasma are investigated. It is shown that they may be important when the electromagnetic energy density becomes comparable to the thermal energy density of the by: It is shown that they may be important when the electromagnetic energy density becomes comparable to the thermal energy density of the plasma.

During the last few years several papers have occurred [e.g. ] on the phenomena of selffocusing and self-trapping of beams of intense optical-frequency electromagnetic waves in by: Propagation of Electromagnetic Waves in Plasma [Ginzburg, V.

L.] on *FREE* shipping on qualifying offers. Propagation of Electromagnetic Waves in PlasmaCited by: The possibility of relativistic self-trapping of an electromagnetic wave in magnetized plasma is studied. It is shown that in the case of propagation of fast wave packet of electromagnetic wave in plasma, self-trapping is possible due to the effect of relativistic non-linearity, which is effective even for small amplitudes of the pumping wave.

Thermal self-focusing of electromagnetic waves in a completely ionized plasma. Authors; Authors and affiliations “Observation of self-focusing of electromagnetic waves in plasma,” Pis'ma Zh.

Eksp. Teor Google Scholar. Isaev, V. Kruglov, et al., “Observation of nonstationary thermal self-focusing of electromagnetic Author: A.

Mastryukov, V. Synakh. Self-trapping of strong electromagnetic beams in relativistic plasmas V. Berezhiani a,c, S.M. Maha jan b, Z. Yoshida a, and M. Ohhashi a a Graduate Scho ol of Fr ontier Sciences. The steady state self-focusing of a Gaussian electromagnetic beam in a magneto-plasma has been studied.

On a short time scale, a non-linearity in the dielectric constant of a plasma appears due to the ponderomotive force. This force in the case of the extraordinary mode has opposite signs forω>ω c andω.

Reviews of Plasma Physics Vol contains two reviews. The first Cooperative Effects in Plasmas by the late B.B. Kadomtsev is based on the second edition of the author's book in Russian which originated from his written lectures for students of the Moscow Institute of Physics and.

laser beam self-focusing and self-trapping was proposed[1]. After more than 50 years of intense research the theoretical concepts and models of self-focusing, beam self-trapping, filamentation and filament plasma defocusing and the corre-sponding mathematical models were formulated. The books and extensive reviews (for example, Refs.

[2–8. A magnetized plasma is a typical anisotropic medium for electromagnetic waves and can support various kinds of waves. Since a plasma consists of light electrons and heavy ions.

erences on self-focusing and self-trapping, see [26]. A unied approach to self-action effects is given in [27]. In our review, we take an approach which is opposite to much of the historical sequence. We will rst discuss instabilities, then beam self-focusing, and nally self-trapping.

4 Nonlinear polarization and the nonlinear refractive index. of a powerful electromagnetic wave passing through a non-linear medium. The self-focusing effect is related with the dependence of the medium dielectric permittivity on the wave intensity.

A good example of a nonlinear medium is a liquid/plasma/gas which under the influence of a pow-erful electromagnetic wave develops coherent orientation of.

Electromagnetic Fluctuations in Plasma focuses on the theoretical investigation of the electromagnetic properties of a plasma (an ionized gas). The manuscript first takes a look at the general theory of fluctuations and electromagnetic fluctuations in media with space-time dispersion.

Self-trapping of electromagnetic beams in vacuum supported by QED nonlinear effects lying self-focusing and instability effects, should be observable in the near future. PACS number~s!: Gy, Tg A localized wave packet propagating in linear homoge-neous media has a tendency to change its spatial width as it.

Faraday Rotation Up: Dispersive Waves Previous: Pulse Propagation Electromagnetic Waves in Unmagnetized Plasmas Consider a point particle of mass and electric charge interacting with a linearly polarized, sinusoidal, electromagnetic plane wave that propagates in the ed that the wave amplitude is not sufficiently large to cause the particle to move at relativistic speeds, the.

In this paper, the self-focusing of an electromagnetic pulsed beam in a collisional plasma has been investigated in the paraxial approximation, following the formalism developed by Akhmanov. The energy balance equation for electrons, the equation expressing the equality of pressure gradient (of electrons and ions) to the force due to space charge field, and the equation for the beam width.

Electromagnetic Waves § Plasma waves A plasma is an ionized gas consisting of charged particles (e.g., electrons and ions). Various waves can be excited easily in a plasma.

Wave phenomena have been an important subject in the plasma research community. The plasma is nearly charge neutral. So the ∇ E~ = 0 still holds. Spatially and temporally resolved measurements of transmitted laser radiation, radial density profiles, and plasma dynamics indicate beam self-trapping in CO 2 laser-induced helium plasmas in strong longitudinal magnetic fields.

Trapping is observed for the cases of β≳1, β?1, and βplasma growth occurs principally by breakdown waves and weak radiation-supported detonation.

Contents: Hot Plasma and its Interaction with Laser Light -- basic concepts; Langmuir waves; ionic sound; electromagnetic plasma waves; elastic collisions of plasma particles; classical absorption of laser radiation; oblique incidence of electromagnetic waves; resonance absorption of electromagnetic waves.

Numerical solutions of the wave equation in a plasma with a nonlinear index due to the ponderomotive force show self-focusing and strong aberration effects. Self-focusing is a non-linear optical process induced by the change in refractive index of materials exposed to intense electromagnetic radiation.

A medium whose refractive index increases with the electric field intensity acts as a focusing lens for an electromagnetic wave characterized by an initial transverse intensity gradient, as in a laser beam. The peak intensity of the self-focused region keeps increasing as the wave .Chapter 5 Electromagnetic Waves in Plasmas General Treatment of Linear Waves in Anisotropic Medium Start with general approach to waves in a linear Medium: Maxwell: 1 ∂E ∂B ∧B = µ oj + ; () c2 ∂t ∧E = − ∂t we keep all the medium’s response explicit in j.

Plasma .published since the concept of laser beam self-focusing and self-trapping was proposed [1]. After more than 50 years of intense research the theoretical concepts and models of self-focusing, beam self-trapping, filamentation, and filament plasma defocusing and the corresponding mathematical models were formulated.