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Simulation of Counterstreaming H + Outflows During Plasmasphere Refilling
Author(s) -
Krall J.,
Huba J. D.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082130
Subject(s) - plasmasphere , ionosphere , physics , geophysics , incoherent scatter , magnetosphere , plasma , nuclear physics
Plasmasphere refilling is modeled using an upgraded version of the Naval Research Laboratory SAMI2 (Sami2 is Another Model of the Ionosphere) ionosphere/plasmasphere code. In this implementation of SAMI2, two fluid species are used for H + , each having a source in only one magnetic hemisphere. This is the first comprehensive plasmasphere model with two‐stream H + . With two counterstreaming H + fluids, artificial shocks or compressions at high altitude are avoided during storms and early‐stage refilling. For late‐stage refilling, runs with two‐stream SAMI2 validate previous SAMI2 (one H + fluid) refilling rates. At ionospheric altitudes ( ≲ 2,000 km), where the single‐fluid approximation is valid for each ion, two‐stream SAMI2 results agree closely with SAMI2 results.