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    Dynamics of Temperature and Density of Cold Protons of the Earth's Plasmasphere Measured by the Auroral Probe/Alpha-3 Experiment Data during Geomagnetic Disturbances

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    Authors
    Bezrukikh, V.V.
    Kotova, G.A.
    Lezhen, L.A.
    Lemaire, J.
    Pierrard, V.
    Venediktov, Y.I.
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    Discipline
    Physical sciences
    Subject
    Aerospace engineering
    Carrier concentration
    Geomagnetism
    Ionosphere
    Magnetic fields
    Magnetosphere
    Mathematical models
    Plasmas
    Protons
    Storms
    Density distribution
    Geomagnetic disturbances
    Plasmasphere
    Thermosphere
    Earth sciences
    Audience
    Scientific
    Date
    2003
    Metadata
    Show full item record
    Description
    We present the results of temperature and density measurement of plasmaspheric protons under quiet and disturbed conditions in the night and dayside sectors of the plasmasphere obtained with the Auroral Probe/Alpha-3 instrument during September 1996 and January 1997. According to the experimental data, the proton temperature in the night sector of the plasmasphere depends on the level of geomagnetic disturbance: it is found that at night hours the values of temperatures inside the plasmasphere at 2.4 < L < 3.5 decreased considerably after the commencement of a geomagnetic storm. The temperature decrease, as a rule, was accompanied by the formation of a flat plateau on the density distribution n(L) at 2.4 < L < 3.5. The above experimental facts (decreasing proton temperature and formation of a flat part on the n(L) distribution) allow us to conclude that the decrease in the proton temperature in the night sector of the plasmasphere connected with magnetic disturbances is caused by the filling of field tubes (depleted after the commencement of the storm) with colder ionospheric plasma. The proton temperature in the dayside sector of the plasmasphere virtually does not depend on the level of the geomagnetic disturbance.
    Citation
    Bezrukikh, V.V.; Kotova, G.A.; Lezhen, L.A.; Lemaire, J.; Pierrard, V.; Venediktov, Y.I. (2003). Dynamics of Temperature and Density of Cold Protons of the Earth's Plasmasphere Measured by the Auroral Probe/Alpha-3 Experiment Data during Geomagnetic Disturbances. , Cosmic Research, Vol. 41, Issue 4, 392-402, DOI: 10.1023/A:1025013828230.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/5137
    doi: http://dx.doi.org/10.1023/A:1025013828230
    scopus: 2-s2.0-3543104346
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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