Abstract The EGD Plasma experiment on board of ISEE-2 spacecraft has been able to observe, in the Earth's magnetotail, positive ions flowing tailward. These ions are observed mostly in the evening sector of the magnetosphere during the recovery phase of the main geomagnetic storms and are identified to be O+ ions. Our observations are made above the plasma sheet, in the lobes of the geomagnetic tail or in the boundary layer. The energy of the oxygen ions is observed to vary from 200 to 10000 eV. When the oxygen energy is high enough, also protons are observed at similar flow speeds. The O+ pitch angle distribution is not centered around the magnetic field direction, and often has a conical pattern. The energy of the O+ is also strongly correlated with the magnetic field component Bz, and is a function of local time.


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    Title :

    Observation of ionospheric oxygen in the geomagnetic tail by ISEE-2


    Contributors:
    Formisano, V. (author) / Orsini, S. (author) / Candidi, M. (author)

    Published in:

    Publication date :

    1981-01-01


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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