Physics – Plasma Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10621183s&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue A10, p. 21183-21198
Physics
Plasma Physics
11
Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
Observations from Polar have revealed that electron hole (e-hole) structure critically depends on the plasma magnetization determined by the ratio Ω=Ωe/ωpe, where Ωe and ωpe are the electron cyclotron and plasma frequencies, respectively. Using three-dimensional parallel particle-in-cell) simulations, we have studied the formation and structure of e-holes by varying Ω showing that (1) for Ω<1 e-holes are highly transitory while for Ω<1 long-lasting e-holes form, especially when Ω>=2, (2) in the transitory e-holes for Ω<1, the e-holes are essentially planar with parallel electric fields E∥>>E⊥, the perpendicular field, (3) when Ω>=2 a variety of structures are possible ranging from spheroidal structures with Ex~Ey~E∥ to a planar one with Ex~Ey<
Loo Sin M.
Singh Nagendra
Wells Earl
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