An experiment on the interaction of a magnetized sphere with a supersonic plasma flow

Details An experiment on the interaction of a magnetized sphere with a supersonic plasma flow An experiment on the interaction of a magnetized sphere with a supersonic plasma flow

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..389k&link_type=abstract

(European Geophysical Society, Symposium on the Earth's Magnetopause Regions, Amsterdam, Netherlands, Sept. 7-10, 1976.) Journal

Physics

Earth Magnetosphere, Magnetohydrodynamic Flow, Particle Beams, Plasma Interactions, Supersonic Flow, Electric Potential, Magnetic Dipoles, Plasma Diagnostics, Plasma Turbulence, Solar Wind

Scientific paper

Today's increased knowledge of the structure and dynamics of the magnetosphere as well as advanced techniques of large volume plasma production and plasma diagnostics led the authors to start an experimental study on the interaction of a fast plasma beam with a magnetized sphere. The experiment reported in this paper relates to a case where a beta value much less than unity and an Alfven Mach number value much less than unity were achieved by reducing substantially the initial magnetization of a low density plasma beam. A pulsed magnetic dipole was exposed to an argon plasma beam of velocities ranging from 9.8 to 31 km/sec. The distribution of the dc electric potential in the upstream and downstream interaction regions was measured by means of a spherical high-input-impedance electric probe. The variation of the potential as a function of the distance from the dipole axis and plasma beam velocity is discussed in terms of the magnetic Reynolds number and its dependence on beam velocity and plasma conductivity.

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