TITLE

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

AUTHOR(S)
Newman, D. L.; Andersson, L.; Goldman, M. V.; Ergun, R. E.; Sen, N.
PUB. DATE
July 2008
SOURCE
Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p072902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
34360831

 

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