TITLE

Kinetics of density striations excited by powerful electromagnetic waves in the ionosphere

AUTHOR(S)

Istomin, Ya. N.; Leyser, T. B.

PUB. DATE

March 2010

SOURCE

Physics of Plasmas;Mar2010, Vol. 17 Issue 3, p032903

SOURCE TYPE

Academic Journal

DOC. TYPE

Article

ABSTRACT

One of the most important effects observed when pumping ionospheric plasma by powerful radio waves from the ground is the excitation of filamentary density striations that are stretched along the ambient geomagnetic field. The kinetics of the striations present in the pump electromagnetic field is studied theoretically. The density irregularities cause inhomogeneities in the pump field, which result in a ponderomotive force acting on the striations that makes the density depressions move perpendicular to the geomagnetic field. Striations moving with different velocities can collide, thereby merging to produce larger scale striations. The merging of striations constitutes a cascade process that distributes the energy over the spatial spectrum of the striations. The resulting inhomogeneity spectrum as well as the obtained outward radial drift of a few meters per second is consistent with experimental results.

ACCESSION #

48912109

 

Related Articles

• Features of modification of the earth's ionosphere by high-power X-mode radio waves and the observed effects. Frolov, V. // Radiophysics & Quantum Electronics;Jun2012, Vol. 55 Issue 1/2, p110 

  Available experimental results on the modification of the Earth's ionosphere by high-power X-mode radio waves are reviewed. It is shown that the influence of such heating on the generation of artificial ionospheric turbulence is of complex nature and has different manifestations in various...

• Waveform and envelope field statistics for waves with stochastically driven amplitudes. Li, B.; Cairns, Iver H.; Robinson, P. A.; LaBelle, J.; Kletzing, C. A. // Physics of Plasmas;Mar2010, Vol. 17 Issue 3, p032110 

  The statistically steady distributions P(log E) and Pe(log Ee) of waveform field E and envelope field Ee are studied for time-varying waves with stochastically driven amplitudes. The waves are represented in one dimension (1D) by a single mode or superposition of multiple independent modes,...

• Solar Eclipses and Ionospheric Effects: Some Historical Perspectives.  // International Journal of Geomatics & Geosciences;2011, Vol. 1 Issue 4, p662 

  The article focuses on a research study revealing the factors that affect the ionosphere and the effect of solar eclipses on it. It informs that ionosphere is effected by both internal and external disturbances like its own ionospheric plasma and solar disturbances respectively. It also reviews...

• On the amplitude of low-frequency signals in the nighttime ionosphere over thunderstorm discharges. Shalimov, S. // Cosmic Research;May2012, Vol. 50 Issue 3, p211 

  It is shown that the origin of anomalous amplitudes of ULF/ELF signals in the topside ionosphere over thunderstorm discharges could be caused by the existence of regions of highly-ionized plasma in the lower ionosphere. The alternating current of the lightning electromagnetic pulse can generate...

• Solar System Ionospheres. Witasse, O.; Cravens, T.; Mendillo, M.; Moses, J.; Kliore, A.; Nagy, A. F.; Breus, T. // Space Science Reviews;Jul2008, Vol. 139 Issue 1-4, p235 

  This article reviews our understanding of the ionospheres in the solar system. It provides some basic information on the sources and sinks of the ionospheric plasma, its dynamics, the energetics and the coupling to the neutral atmosphere. Ionospheres in the solar system are reviewed and...

• Influence of anisotropic fluctuations of the ionosphere plasma density on deep radio sounding by a ultra wide band radar with synthesized aperture. Ilyushin, Ya. A. // Cosmic Research;Apr2010, Vol. 48 Issue 2, p157 

  The problem of deep sounding of planet interior using ultra wide band radar with synthesized aperture is considered for the case when anisotropic fluctuations of the ionosphere plasma density take place. Modeling is performed for a number of values of the medium and radar characteristic...

• Paraxial Gaussian wave beam propagation in an anisotropic inhomogeneous plasma. Poli, E.; Pereverzev, G.V. // Physics of Plasmas;Jan1999, Vol. 6 Issue 1, p5 

  Reports on a technique that describes electromagnetic wave beam propagation in the short wavelength limit. Analytic solutions in an inhomogeneous magnetized plasma; Deformation of the beam's cross section due to the anisotropy of the medium.

• Recent results for plasma antennas. Alexeff, Igor; Anderson, Ted; Farshi, Esmaeil; Karnam, Naresh; Pulasani, Nanditha Reddy // Physics of Plasmas;May2008, Vol. 15 Issue 5, p057104 

  Plasma antennas are just as effective as metal antennas. They can transmit, receive, and reflect radio waves just as well as metal antennas. In addition, plasma generated noise does not appear to be a problem.

• Experimental Studies of the Effects Observed During the Nonlinear Interaction of Two High-Power Radio Waves in a Magnetoplasma. Frolov, V.; Sergeev, E.; Thide, B.; Shorokhova, E. // Radiophysics & Quantum Electronics;Feb2005, Vol. 48 Issue 2, p98 

  We present the results of experiments on modification of the ionospheric F region by two high-power (Peff � 20 MW) O-mode electromagnetic waves. The experiments were performed at the �Sura� heating facility of the Radiophysical Research Institute (Nizhny Novgorod, Russia) in May...

Read the Article