Temporal evolution of whistler growth in a cold plasma injection experiment

Details Temporal evolution of whistler growth in a cold plasma injection experiment Temporal evolution of whistler growth in a cold plasma injection experiment

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.7351g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Sept. 1, 1984, p. 7351-7355. Navy-NASA-supported research.

Other

5

Cold Plasmas, Electron Precipitation, Ion Injection, Plasma Density, Space Plasmas, Whistlers, Atmospheric Models, Atmospheric Turbulence, Lithium, Radiation Belts, Spaceborne Experiments

Scientific paper

The evolution of whistler mode turbulence and particle participation in a cold plasma release are studied experimentally as part of the Active Magnetospheric Particle Tracers Explorer (AMPTE) program. The investigation used a simple time dependent cold plasma density model, and an atypical ambient radiation belt was assumed. It is shown that a cold lithium injection in the AMPTE parameter range can give rise to whistler mode turbulence with significant gain to the wave amplitude in a single pass through a flux tube. Whistler mode growth results in the pitch angle diffusion of energetic electrons, which are in turn precipitated. The rate of power input into the ionosphere from these precipitating electrons is roughly estimated at 2 ergs per sq cm/s. It is found that this value of the precipitated power is large enough to continue producing a visible aurora until the injected plasma in the flux tube is lost or destroyed by magnetospheric convection or other processes.

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