Problems of the theory of linear and nonlinear transformation of waves in inhomogeneous media
Abstract
The review is devoted to effects that occur when waves propagate in inhomogeneous media. The types of linear transformation of waves by the inhomogeneities of the medium are classified, and the conditions under which they are realized are indicated. Linear transformation of oscillations in a non-equilibrium medium, leading to wave amplification, is investigated. The linear transformation is consistently analyzed on the basis of a fourth-order differential equation. Attention is called to the singularities of linear wave transformation in a plasma-beam system, particularly the anisotropy of the radiation of transverse waves following passage of a modulated beam through an inhomogeneous plasma. The generation of the second harmonic of an electromagnetic wave in an inhomogeneous plasma and decay processes in inhomogeneous media are considered. Kinetic nonlocal effects (of the echo type) in an inhomogeneous plasma, wherein the focusing action of the inhomogeneity makes possible linear nonlocal effects as well as echo at the summary frequency are described. The indicated nonlinear and kinetic nonlocal effects lead to transparentization of the inhomogeneous media. Certain experimental studies dealing with the problems touched upon in the review are discussed.
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Despite the computational cost of conventional explicit EM PIC, it could still be possible to employ it in some cases when the corresponding thruster is small enough or by artificially reducing it using scaling techniques, though the physics might not be entirely equivalent to that of the original setup.
“Despite the computational cost of the conventional explicit EM PIC, it could still be possible to employ it in some cases 122 , when the corresponding thruster is small enough or by artificially reducing it using scaling techniques (in the latter case, one has to be cautious though, as the physics might not be entirely equivalent to that of the original setup 86,137 ).”
From Plasma propulsion modeling with particle-based algorithms (2023) · cites this paper as [137]
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Kravtsov, Y. A., Naida, O. N., & Fuki, A. A. (1996) · Physics-Uspekhi · doi:10.1070/pu1996v039n02abeh000131 · Cited by 57 · see citing works
Plasma propulsion modeling with particle-based algorithms
Taccogna, F., Cichocki, F., Eremin, D., Fubiani, G., & Garrigues, L. (2023) · Journal of Applied Physics · doi:10.1063/5.0153862 · Cited by 29 · see citing works
- Authors
- Erokhin, N. S., & Moiseev, S. S.
- Venue
- Soviet Physics Uspekhi
- Published
- 1973-01-31
- Volume
- 16
- Issue
- 1
- Pages
- 64-81
- ISSN
- 0038-5670 (ISSN-L)
- OpenAlex
- W1964000099
- Cited by
- 17
- References
- 0
- Citations by year
- 2023: 1 · 2016: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soviet Physics Uspekhi (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Dust and Plasma Wave Phenomena
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Laser-Plasma Interactions and Diagnostics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Gyrotron and Vacuum Electronics Research
- Keywords
- wave propagation in inhomogeneous media, nonlinear wave transformation, wave amplification, fourth-order differential equations, beam-plasma interaction, modulated beams, second harmonic generation, wave decay, echo, inhomogeneous plasma
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