Langmuir wave filamentation instability

Rose, Harvey A.; Yin, L.
April 2008
Physics of Plasmas;Apr2008, Vol. 15 Issue 4, p042311
Academic Journal
A Langmuir wave (LW) model is constructed whose equilibria are consistent with stimulated Raman scatter optimization, with Hamiltonian dynamics, and with rotational invariance. Linear instability analysis includes terms to all orders in wave amplitude and fluctuation wavenumber expansions, δk. Resultant LW modulational instability is nonstandard: As the LW amplitude increases, the unstable δk range first expands and then shrinks to zero. Large amplitude wave model dynamics requires hyperdiffraction terms if kλD<0.45, lest artificially small length scales become unstable.


Related Articles

  • Stimulated Raman scattering of a laser in a plasma with clusters. Tiwari, Pawan K.; Tripathi, V. K. // Physics of Plasmas;Apr2004, Vol. 11 Issue 4, p1674 

    The presence of sub-micron size clusters in a gas jet plasma considerably modifies the dispersion relations for electromagnetic and Langmuir waves. A high intensity laser propagating through such a plasma undergoes stimulated Raman scattering (SRS). The free electrons inside the clusters play a...

  • A 2A2←X 2B1 absorption and Raman spectra of the OClO molecule: A three-dimensional time-dependent wave packet study. Sun, Zhigang; Lou, Nanquan; Nyman, Gunnar // Journal of Chemical Physics;2/1/2005, Vol. 122 Issue 5, p054316 

    Time-dependent wave packet calculations of the (A 2A2←X 2B1) absorption and Raman spectra of the OClO molecule are reported. The Fourier grid Hamiltonian method in three dimensions is employed. The X 2B1 ground state ab initio potential energy surface reported by Peterson [J. Chem. Phys....

  • Nonlinear Raman scattering behavior with Langmuir and sound waves coupling in a homogeneous plasma. Bonnaud, Guy; Pesme, Denis; Pellat, René // Physics of Fluids B: Plasma Physics;Jul90, Vol. 2 Issue 7, p1618 

    By means of wave-coupling simulations, the typical nonlinear evolution of stimulated Raman scattering (SRS) is investigated in a homogeneous sub-quarter-critical plasma for present-day low laser irradiances and kilo-electron-volt electron temperatures. The decrease of the Langmuir energy...

  • Decay of the daughter electromagnetic wave driven by stimulated Raman scattering into two Langmuir waves. Baker, K. L. // Physics of Plasmas;Jul2000, Vol. 7 Issue 7 

    Much attention has been focused on the saturation of stimulated Raman scattering by the decay of its daughter waves. This research has almost exclusively dealt with the decay of the daughter Langmuir wave into secondary Langmuir waves and ion acoustic waves. In this Letter, the decay of the...

  • Theory of coherent Raman scattering with quasi-cw noisy light for a general line shape function. Ulness, Darin J.; Kirkwood, Jason C.; Stimson, Michael J.; Albrecht, A.C. // Journal of Chemical Physics;11/8/1997, Vol. 107 Issue 18, p7127 

    Studies the theory of coherent Raman scattering with quasi-cw noisy light for a general line shape function. Interferometric decay of each of the terms; Identical decay of the Lorentzian line; Principles of factorized time correlation diagram analysis.

  • The Raman spectrum of Ti3SiC2. Amer, M.; Barsoum, M. W. // Journal of Applied Physics;11/15/1998, Vol. 84 Issue 10, p5817 

    Presents information on a study which compared the Raman spectrum of Ti3SiC2 with that of TiC0.67. Similarities between Ti3SiC2 and TiCx; Processing details; Results; Conclusions.

  • Raman intensities from Kohn–Sham calculations. Stirling, András // Journal of Chemical Physics;1/22/1996, Vol. 104 Issue 4, p1254 

    Raman intensity calculations have been performed for nine small main-group molecules using the Kohn–Sham density functional method. A combination of numerical and analytic derivation techniques was used as implemented in the program package DEMON. The effect of the applied functional, the...

  • Proof of quasilinear equations in the strongly nonlinear regime of the weak warm beam instability. Escande, D. F.; Elskens, Y. // Physics of Plasmas;May2003, Vol. 10 Issue 5, p1588 

    Quasilinear (QL) theory was developed in 1962 to describe the saturation of the weak warm beam-plasma instability, which involves the development of a Langmuir turbulence and the formation of a plateau in the electron velocity distribution function. The original derivations assume that particle...

  • The influence of subsidiary Langmuir decay on the spectrum of stimulated Raman scattering. Drake, R. P.; Batha, S. H. // Physics of Fluids B: Plasma Physics;Nov91, Vol. 3 Issue 11, p2936 

    The saturation of stimulated Raman scattering (SRS) from plasmas produced by visible or ultraviolet (UV) lasers is discussed. A correspondence is reported between relatively strong plasma-wave damping and relatively large spectral intensity in the observed SRS spectra. This observation is...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics