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Geophysical Monograph Series

 

Keywords

  • Plasma waves—Congresses
  • Magnetospheres—Congresses
  • Comets—Congresses

Index Terms

  • 2740 Magnetospheric Physics: Magnetospheric configuration and dynamics
  • 2788 Magnetospheric Physics: Storms and substorms
  • 7867 Space Plasma Physics: Wave-particle interactions
  • 7847 Space Plasma Physics: Radiation processes

Article

GEOPHYSICAL MONOGRAPH SERIES, VOL. 53, PP. 119-133, 1989

Generation of ELF elecfromagnetic waves and diffusion of energetic electrons in steady and non-steady state situations in the Earth's magnetosphere

J. Solomon, N. Cornilleau-Wehrlin, A. Korth, and G. Kremser

Interaction of energetic electrons (16–300 keV) and ELF waves (100 Hz–3 kHz) has been studied by using data of the GEOS-1 and -2 satellites. In steady-state, it is demonstrated that this interaction enters quite well into the framework of the quasi-linear theory of pitch-angle diffusion. By calculating the wave growth rate at different magnetic latitudes, it is shown that inside the plasmasphere the path integrated gain is large enough for explaining generation of hiss, in agreement with theoretical and experimental results on wave propagation. Outside the plasmasphere hiss generation deserves further study. At the time of storm sudden commencements, non-steady state behaviour is observed that results in antiphase oscillations of the maximum of the wave spectrum and of the corresponding growth rate and anisotropy.

Citation: Solomon, J., N. Cornilleau-Wehrlin, A. Korth, and G. Kremser (1989), Generation of ELF elecfromagnetic waves and diffusion of energetic electrons in steady and non-steady state situations in the Earth's magnetosphere, in Plasma Waves and Instabilities at Comets and in Magnetospheres, Geophys. Monogr. Ser., vol. 53, edited by B. T. Tsurutani and H. Oya, pp. 119–133, AGU, Washington, D. C., doi:10.1029/GM053p0119.

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