A hybrid simulation model for a stable auroral arc

Details A hybrid simulation model for a stable auroral arc A hybrid simulation model for a stable auroral arc

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002angeo..20.1603j&link_type=abstract

Annales Geophysicae, vol. 20, Issue 10, pp.1603-1616

Physics

2

Scientific paper

We present a new type of hybrid simulation model, intended to simulate a single stable auroral arc in the latitude/altitude plane. The ionospheric ions are treated as particles, the electrons are assumed to follow a Boltzmann response and the magnetospheric ions are assumed to be so hot that they form a background population unaffected by the electric fields that arise. The system is driven by assumed parallel electron energisation causing a primary negative charge cloud and an associated potential structure to build up. The results show how a closed potential structure and density depletion of an auroral arc build up and how they decay after the driver is turned off. The model also produces upgoing energetic ion beams and predicts strong static perpendicular electric fields to be found in a relatively narrow altitude range (~ 5000 11 000 km).

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