stimulated raman scattering plasma

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2017. A relativistic one-and-a-half dimensional particle code has been used to simulate the scattering process and the results from the numerical experiments have been compared with those obtained analytically, the agreement being generally good. A relativistic electron beam co-propagating with a high power laser in plasma is shown to add to the growth of the stimulated Raman back scattering of the laser. Registered in England & Wales No. The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative This chapter considers the Raman instability and a related instability in which a light wave couples into two electron plasma waves. 2018. View all Google Scholar citations for this article. An important class of instabilities involves the coupling of a large amplitude light wave into a scattered light wave plus either an electron plasma wave or an ion acoustic wave.

At high intensities, Raman scattering also occurred in the very underdense plasma. Agreement NNX16AC86A, Is ADS down? Plasma inhomogeneity limits the region over which three waves can resonantly interact, and propagation of wave energy out of the region introduces an effective dissipation which must be overcome. Rev.

Copyright © Cambridge University Press 1985. Raman light measurements for 5320 Å irradiated disk target experiments are also reported. Published online by Cambridge University Press:  Stimulated Raman scattering in a non-eigenmode regime - Volume 8 - Yao Zhao, Suming Weng, Zhengming Sheng, Jianqiang Zhu. The Raman instability can be most simply characterized as the resonant decay of an incident photon into a scattered photon plus an electron plasma wave. Finite Larmor radius corrections have been considered in the effects of strong magnetic fields on stimulated Raman scattering. In the case of phase mismatch, the growth rate drops by an order. stimulated Brillouin and Raman scattering; Emission absorption and scattering of electromagnetic radiation. and Lett. Shi, Yuan A nonlinear dispersion relation describing the various channels of decay has been derived from the Vlasov-Maxwell equations and frequencies and growth rates determined for the decay of incident laser light in the extraordinary mode into scattered extraordinary mode radiation and electron Bernstein waves. We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Qin, Hong Rose and D. F. DuBois, Phys. 13 March 2009. Stimulated Raman scattering (SRS) in plasma in a non-eigenmode regime is studied theoretically and numerically. Use, Smithsonian In an unmagnetized plasma this occurs only when the plasma has a finite temperature.

A model for stimulated Brillouin (SBS) and Raman (SRS) backscattering of a spatially smoothed laser beam interacting with a collisional, inhomogeneous, expanding plasma is presented. Growth rates of the Bernstein waves are substantial when sufficiently strong magnetic fields are present in hot plasmas. The growth rate is sensitive to phase matching of electron beam with the plasma wave. 30990675 Howick Place | London | SW1P 1WG © 2020 Informa UK Limited. Close this message to accept cookies or find out how to manage your cookie settings. Shi, Yuan A relativistic electron beam co-propagating with a high power laser in plasma is shown to add to the growth of the stimulated Raman back scattering of the laser. In the case of phase mismatch, the growth rate drops by an order. and The growth rate is sensitive to phase matching of electron beam with the plasma wave. Get access to the full version of this content by using one of the access options below. If you should have access and can't see this content please, Proceedings of International Conference on Plasma Physics, Goteborg, Sweden. The light near 2λ 0 or 1.064 μm had both a red- and blue-shifted component. Notice, Smithsonian Terms of Astrophysical Observatory. Under these conditions the kinetic analysis shows that, in contrast to the predictions of fluid theory, the scattered light emitted from densities well below the quarter-critical layer can have a frequency less than ½ω0 where ω0 is the laser frequency. Fisch, Nathaniel J. Finite Larmor radius corrections have been considered in the effects of strong magnetic fields on stimulated Raman scattering. It is based on the independent hot spots description [H. A.

The energy spread of the electron beam significantly reduces the effectiveness of the beam on the stimulated Raman process. Kinetic theory of stimulated Raman scattering from... Department of Physics, University College of North Wales, Bangor LL57 2UW, U.K. https://doi.org/10.1017/S002237780000252X. The chapter discusses the linear theory of the Raman instability with a heuristic calculation of the threshold in a plasma with a linear density profile. Stimulated Raman Scattering With William L. Kruer An important class of instabilities involves the coupling of a large amplitude light wave into a scattered light wave plus either an electron plasma wave or an ion acoustic wave. Fisch, Nathaniel J. Damping of the unstable waves introduces a threshold intensity for instability generation.

Qin, Hong DOI link for The Physics Of Laser Plasma Interactions, The Physics Of Laser Plasma Interactions book. Usage data cannot currently be displayed.

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