Using simultaneous observations from the DE-1 High-Altitude Plasma Instrument and the Plasma Wave Instrument, a study is made of 28 auroral-zone crossings, equally divided among dayside and nightside cases covering a range of Kp values from 1- to 8. In the diffuse auroral region, electrostatic emissions of frequencies up to a few kHz are associated with low-energy field-aligned electron beams. Of 18 cases (11 nightside; 7 dayside) examined at high resolution in the particle data, 15 (9 nightside; 6 dayside) exhibited field-aligned beams with electrostatic waves. In most cases, the beams were upward-directed, but occasionally they traveled both up and down the field line. The electrostatic emissions are interpreted as electron-acoustic waves excited by the field-aligned beams.


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    Titel :

    Plasma waves associated with diffuse auroral electrons at mid-altitudes


    Beteiligte:
    Sharber, J. R. (Autor:in) / Menietti, J. D. (Autor:in) / Wong, H. K. (Autor:in) / Burch, J. L. (Autor:in) / Gurnett, D. A. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1988-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Plasma waves associated with diffuse auroral electrons at mid-altitudes

    Sharber, J.R. / Menietti, J.D. / Wong, H.K. et al. | Elsevier | 1989


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    Tsurutani, B.T. | Online Contents | 2001


    Strong Fluctuations of Energetic Electrons at Low Altitudes

    Kudela, K. / Slivka, M. / Martin, I. M. et al. | British Library Conference Proceedings | 1997