Research output: Contribution to journal › Article
Low altitude image of particle acceleration and magnetospheric reconfiguration at substorm onset. / Sergeev, V.A.; Kubyshkina, M.V.
In: Journal of Geomagnetism and Geoelectricity, Vol. 48, 1996, p. 877-885.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Low altitude image of particle acceleration and magnetospheric reconfiguration at substorm onset
AU - Sergeev, V.A.
AU - Kubyshkina, M.V.
PY - 1996
Y1 - 1996
N2 - We compare meridional distributions of auroral (0.3-20 keV) and energetic (30-300 keV) particle fluxes measured by two low-altitude polar-orbiting spacecraft which crossed the auroral oval before and shortly after the sudden substorm onset. 3-4 min after the substorm onset a very strong particle energization was observed with the particle flux increased by a factor 100-1000 at energies up to >300 keV. It was found in the middle of auroral oval, poleward of the isotropic boundary of energetic electrons detected prior to the substorm onset. Interpreting the variations of Energetic Particle (EP) flux and anisotropy (ratio of precipitated to trapped particle flux) in terms of particle scattering in the equatorial current sheet, we were able to characterize the configuration of equatorial magnetotail. The major acceleration/precipitation region in the center of auroral zone was inferred to be confined in the region of dipolarized magnetic field in the magnetotail. Further poleward (tailward in the magnetotail) the
AB - We compare meridional distributions of auroral (0.3-20 keV) and energetic (30-300 keV) particle fluxes measured by two low-altitude polar-orbiting spacecraft which crossed the auroral oval before and shortly after the sudden substorm onset. 3-4 min after the substorm onset a very strong particle energization was observed with the particle flux increased by a factor 100-1000 at energies up to >300 keV. It was found in the middle of auroral oval, poleward of the isotropic boundary of energetic electrons detected prior to the substorm onset. Interpreting the variations of Energetic Particle (EP) flux and anisotropy (ratio of precipitated to trapped particle flux) in terms of particle scattering in the equatorial current sheet, we were able to characterize the configuration of equatorial magnetotail. The major acceleration/precipitation region in the center of auroral zone was inferred to be confined in the region of dipolarized magnetic field in the magnetotail. Further poleward (tailward in the magnetotail) the
M3 - статья
VL - 48
SP - 877
EP - 885
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
ER -
ID: 5055319