Influence of suprathermal background electrons on strong auroral double layers: Vlasov-simulation parameter study

Details Influence of suprathermal background electrons on strong auroral double layers: Vlasov-simulation parameter study Influence of suprathermal background electrons on strong auroral double layers: Vlasov-simulation parameter study

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phpl...15g2902n&link_type=abstract

Physics of Plasmas, Volume 15, Issue 7, pp. 072902-072902-11 (2008).

Physics

8

Mhd Waves, Plasma Waves, And Instabilities, Energetic Trapped Particles, Electric Fields, Field-Aligned Currents And Current Systems, And Ring Currents, Auroral Phenomena In Magnetosphere, Plasma Sheaths, Fokker-Planck And Vlasov Equation

Scientific paper

Recent observations by the Fast Auroral SnapshoT (FAST) satellite [Andersson et al., Phys. Plasmas 15, 072901 (2008), this issue] suggest that characteristics of particles and waves on the high-potential side of strong double layers in Earth's auroral downward current region are influenced by properties of the suprathermal electron component. Current-driven Vlasov simulations in one spatial dimension with suprathermal electrons differing in density and temperature were performed to study their influence on double-layer evolution. A sufficiently dense and hot suprathermal population is found to stabilize strong laminar double layers over long periods while regulating their strength and velocity. Synthetic electron energy-flux spectra from simulations with different suprathermal electron populations reveal certain similarities to the corresponding FAST observations.

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