Computer Science – Sound
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm22a0810f&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM22A-0810
Computer Science
Sound
2159 Plasma Waves And Turbulence
Scientific paper
Electrostatic wave activity upstream of Earth's bow shock exhibit some features which are sometimes difficult to interpret in terms of classical Langmuir turbulence, involving nonlinear phenomena between Langmuir and ion-sound waves. The existence and generation of another electrostatic mode in the foreshock, the electron-acoustic mode which exists only in plasmas with two electron components, was dissussed by several authors [Marsch 1985; Mace and Hellberg 1985; Schriver et al. 2000]. By means of Vlasov simulations, we examine the development and nonlinear evolution of electrostatic waves in a plasma with cold and hot electrons and an electron beam, in conditions similar to those of the foreshock. The hot and cold populations are assumed to be anisotropic. The formation of electron-acoustic waves is observed, and their role in the subsequent evolution of electrostatic turbulence is discussed.
Décréau Pierrette
Fijalkow E.
Krasnoselskikh Vladimir
Lefebvre Bertrand
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