Dusty Plasma Dynamics Near Surfaces in Space

Details Dusty Plasma Dynamics Near Surfaces in Space Dusty Plasma Dynamics Near Surfaces in Space

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stin...0294305c&link_type=abstract

Technical Report, Colorado Univ. Boulder, CO United States Lab. for Atmospheric and Space Physics

Physics

Plasma Dynamics, Plasmas (Physics), Plasma Sheaths, Dusty Plasmas, Particle Interactions, Atmospheric Models, Space Environment Simulation, Ultraviolet Radiation, Meteorite Collisions, Photoelectrons, Electric Fields, Aerospace Environments, Statistical Analysis

Scientific paper

The investigation 'Dusty Plasma Dynamics Near Surfaces in Space' is an experimental and theoretical study of the dynamics of dust particles on airless bodies in the solar system in the presence of a photoelectron sheath generated by solar ultraviolet light impinging on the surface. Solar UV illumination of natural and manmade surfaces in space produces photoelectrons which form a plasma sheath near the surface. Dust particles on the surface acquire a charge and may be transported by electric fields in the photoelectron sheath generated by inhomogeneities in the surface or the illumination (such as shadows). The sheath itself has a finite vertical extent leading to (at least) an electric field normal to the illuminated surface. If dust particles are launched from the surface by some other process, such as meteoroid impact, or spacecraft activity on the surface, these grains become charged and move under the influence of gravity and the electric field. This can give rise to suspension of the particles above the surface, loss from the parent body entirely (if accelerated beyond escape velocity), and a different distribution of dust ejecta from what would be expected with purely gravitational dynamics.

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