Computer Science – Sound
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980esasp.152..289s&link_type=abstract
In ESA European Rocket and Balloon Programs and Related Res. p 289-291 (SEE N81-10914 01-99)
Computer Science
Sound
Auroras, Extremely Low Radio Frequencies, Magnetohydrodynamic Waves, Proton Beams, Distribution Functions, Particle Energy, Pitch (Inclination), Rocket Sounding, Spatial Distribution
Scientific paper
Measurements of nearly monoenergetic 65 KeV protons above active auroral forms were obtained on a rocket flight from Andenes (Norway) on Oct. 13, 1977. Analysis of the pitch angle distribution of the 30 KeV protons and the azimuthal anisotropy of the proton fluxes support a model of a proton beam of finite spatial extent. The particle observations occur simultaneously with ULF-waves in the frequency range 0.5 - 5Hz. The particle distribution function is unstable to an amplification of obliquely propagating Alfven waves. It is concluded that the waves amplified by resonant interaction with the proton beam.
Goertz Christoph K.
Stuedemann W.
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