Ion drift in the Earth's inner plasmosphere during magnetospheric disturbances and proton temperature dynamics

According to measurements of thermal plasma in the Earth's inner plasmosphere on INTER-BOL-2 and MAGION-5 satellites, it was shown that during the main phase of magnetic storms, the temperature of the plasmosphere ions, as a rule, decreases, while the plasma density increases or remains at the level characteristic for undisturbed conditions. The physical mechanism, describing the ion drift during a magnetic storm, which leads to a decrease in temperature, is considered. It is shown that for cold near-equatorial plasma, the third adiabatic invariant is preserved in the processes with a characteristic time less than the period of charged particles drift around the Earth. The constructed model of the drift shell displacement from the Earth, caused by a decrease in the magnetic field in the inner plasmosphere during the development of a magnetic storm, satisfactorily describes a decrease in protons temperature near the equatorial plane.

Verigin M.I., Kotova G.A., Bezrukikh V.V., Bogdanov V.V., Kaisin A.V. Ion drift in the Earth's inner plasmosphere during manitospheric disturbances and proton temperature dynamics. // Geomagnetism and Aeronomy. 2011. Vol.51, p.41-50.