Intensity variations in plasma flow at the dawn magnetopause

Details Intensity variations in plasma flow at the dawn magnetopause Intensity variations in plasma flow at the dawn magnetopause

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28.1163l&link_type=abstract

Planetary and Space Science, vol. 28, Dec. 1980, p. 1163-1169.

Physics

5

Magnetohydrodynamic Flow, Magnetopause, Magnetospheric Ion Density, Particle Flux Density, Ion Distribution, Ionic Diffusion, Magnetic Flux, Morning, Power Spectra, Voyager 1 Spacecraft

Scientific paper

Observations of plasma flows in the region of the dawn magnetopause obtained by the outbound Voyager 1 spacecraft, at a velocity of 11 km/sec, are discussed. Magnetic field and ion data obtained for the period surrounding four magnetopause crossings are presented which reveal energetic anti-sunward flowing ions outside the boundary with a time variability on the order of 400 millisec. These particle intensity variations, observed to vary with frequency, are most likely associated with the particle energization process or with the leakage of magnetospheric protons. The ion flows are considered to have originated sunward of the dawn meridian and were observed to penetrate approximately an ion gyroradius inside the dawn magnetopause.

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