Hostname: page-component-76fb5796d-x4r87 Total loading time: 0 Render date: 2024-04-26T06:43:34.127Z Has data issue: false hasContentIssue false
  • English
  • Français

Full-scale simulation study of stimulated electromagnetic emissions: The first ten milliseconds

Published online by Cambridge University Press:  15 January 2010

BENGT ELIASSON  and
LENNART STENFLO
BENGT ELIASSON
Affiliation:
Theoretische Physik IV, Ruhr-Universität Bochum, DE-44780, Bochum, Germany (bengt@tp4.rub.de)
LENNART STENFLO
Affiliation:
Department of Physics, Linköping University, SE-581 83, Linköping, Sweden
Get access Rights & Permissions [Opens in a new window]

Abstract

A full-scale numerical study is performed of the nonlinear interaction between a large-amplitude electromagnetic wave and the Earth's ionosphere, and of the stimulated electromagnetic emission emerging from the turbulent layer, during the first 10 milliseconds after switch-on of the radio transmitter. The frequency spectra are downshifted in frequency and appear to emerge from a region somewhat below the cutoff of the O mode, which is characterized by Langmuir wave turbulence and localized Langmuir envelopes trapped in ion density cavities. The spectral features of escaping O-mode waves are very similar to those observed in experiments. The frequency components of Z-mode waves, trapped in the region between the O- and Z-mode cutoffs show strongly asymmetric and downshifted spectra.

Type
Papers
Information
Journal of Plasma Physics , Volume 76 , Special Issue 3-4: In Honor of Professor Padma Kant Shukla on the Occasion of His 60th Birthday , August 2010 , pp. 369 - 375
Copyright
Copyright © Cambridge University Press 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Eliasson, B. 2007 A nonuniform nested grid method for simulations of RF induced ionospheric turbulence. Comput. Phys. Commun. 178, 8.Google Scholar
Eliasson, B. 2008 Full-scale simulation study of the generation of topside ionospheric turbulence using a generalized Zakharov model. Geophys. Res. Lett. 35, L11104.CrossRefGoogle Scholar
Eliasson, B. and Stenflo, L. 2008 Full-scale simulation study of the initial stage of ionospheric turbulence. J. Geophys. Res. 113, A02305, doi:10.1029/2007JA012837.Google Scholar
Eliasson, B., Stenflo, L. and Shukla, P. K. 2008 Full-scale numerical modeling of turbulent processes in the Earth's ionosphere. AIP Conf. Proc. 1061, 197.CrossRefGoogle Scholar
Frolov, V. L., Sergeev, E. N., Komrakov, G. P., Stubbe, P., Thidé, B., Waldenvik, M., Veszelei, E., Leyser, T. B. 2004 Ponderomotive narrow continuum (NCp) component in stimulated electromagnetic emission spectra. J. Geophys. Res. 109, A07304, doi: 10.1029/2001JA005063.Google Scholar
Gondarenko, N. A., Ossakow, S. L. and Milikh, G. M. 2006 Nonlinear evolution of thermal self-focusing instability in ionospheric modifications at high latitudes: aspect angle dependence. Geophys. Res. Lett. 33, L16104, doi:10.1029/2006GL025916.Google Scholar
Gurevich, A. V. 2007 Nonlinear effects in the ionosphere. Phys.-Usp. 50, 1091.Google Scholar
Kuo, S. P. 2001 Cascade of parametric instabilities in ionosphere heating experiments. J. Plasma Phys. 66, 315.CrossRefGoogle Scholar
Kuo, S. P. 2003 On parametric instabilities in HF heating of the ionosphere. J. Plasma Phys. 69, 529.Google Scholar
Scales, W. A. and Xi, H. 2000 Theoretical and numerical simulation investigation of parametric processes associated with up-shifted ionospheric stimulated radiation. Phys. Scripta T84, 184.Google Scholar
Shukla, P. K. and Stenflo, L. 1992 Influence of a high-power radio wave on velocity gradient driven instabilities in the auroral F region ionosphere. J. Geophys. Res. 97 (A2), 1313.CrossRefGoogle Scholar
Shukla, P. K., Stenflo, L. and Borisov, N. D. 1992 Nonlinear interaction of powerful radio waves with the plasma in the Earth's lower ionosphere. J. Geophys. Res. 97 (A8), 12279.Google Scholar
Shukla, P. K. and Mamun, A. A. 2002 Introduction to Dusty Plasma Physics. Institute of Physics.Google Scholar
Shukla, P. K., Stenflo, L., Rosenberg, M. and Resendes, D. P. 2002 Dynamics of Farley-Buneman fluctuations in the presence of radar beams. J. Geophys. Res. 107 (A10), 1311, doi: 10.1029/2002JA009408.Google Scholar
Shukla, P. K., Eliasson, B. and Stenflo, L. 2004 Stimulated scattering of intense radio waves in partially ionized space dusty plasmas. J. Geophys Res. 109, A03301.Google Scholar
Stenflo, L. and Shukla, P. K. 1997 Comments on the parametric excitation of low-frequency electrostatic waves. J. Atm. Sol. Terr. Phys. 59, 2431.Google Scholar
Stenflo, L. and Shukla, P. K. 2000 Theory of stimulated scattering of large-amplitude waves. J. Plasma Phys. 64, 353.Google Scholar
Stenflo, L. 2004 Comments on stimulated electromagnetic emissions in the ionospheric plasma. Phys. Scripta T107, 262.Google Scholar