On the electrostatic potential and charge of cosmic grains. I - Theoretical background and preliminary results

Details On the electrostatic potential and charge of cosmic grains. I - Theoretical background and preliminary results On the electrostatic potential and charge of cosmic grains. I - Theoretical background and preliminary results

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95..295l&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 2, Mar. 1981, p. 295-303.

Physics

Plasma Physics

24

Cosmic Dust, Electric Potential, Interplanetary Medium, Interstellar Matter, Plasma Physics, Electric Charge, Grains, Photoelectric Emission, Plasma Probes, Spacecraft Charging

Scientific paper

A general theory of the floating potential of a spherical cosmic grain under the influence of the surrounding plasma is presented. A method for finding it is also derived. All the physical effects occurring on the grain surface are taken into account. The components of the plasma can have non zero drift velocities with respect to the grain. It is shown that the floating potential has a unique and well defined value. The electric charge carried by the grain is also found. Numerical calculations have been performed in order to test the influence of various parameters; the results are discussed and compared to other results found in the literature.

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