Vlasov simulation of electrostatic solitary structures in four-component plasmas

Details Vlasov simulation of electrostatic solitary structures in four-component plasmas Vlasov simulation of electrostatic solitary structures in four-component plasmas

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11b1731u&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11B-1731

Physics

Plasma Physics

[6984] Radio Science / Waves In Plasma, [7815] Space Plasma Physics / Electrostatic Structures, [7839] Space Plasma Physics / Nonlinear Phenomena, [7852] Space Plasma Physics / Solitons And Solitary Waves

Scientific paper

Electrostatic solitary structures have been observed in the Earth's magnetosheath. Recent theoretical works have suggested that these solitary structures are modeled by electron acoustic solitary waves existing in a four-component plasma system consisting of core electrons, two counter-streaming electron beams, and one background ions. However, previous theoretical works did not present discussions on how electron acoustic waves are excited and how solitary structures are formed. The present study aims to discuss nonlinear evolution of four-component plasma systems by means of one-dimensional electrostatic Vlasov simulation. The present Vlasov simulation shows that either electron acoustic solitary waves with negative potential or electron phase-space holes with positive potential are excited in four-component plasma systems. However, these electrostatic solitary structures have longer duration time and higher wave amplitude than observed solitary structures. The present study also suggests that characteristics of electron phase-space holes excited by a weak-electron-beam instability are in good agreement with bipolar solitary pulses observed the Cluster spacecraft.

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