The importance of 'fluff' on cosmic grains (and larger bodies) for their electric charge, the electron or ion field emission and the levitation of adherent small solid particles

Details The importance of 'fluff' on cosmic grains (and larger bodies) for their electric charge, the electron or ion field emission and the levitation of adherent small solid particles The importance of 'fluff' on cosmic grains (and larger bodies) for their electric charge, the electron or ion field emission and the levitation of adherent small solid particles

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134..296l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 2, May 1984, p. 296-300.

Astronomy and Astrophysics

Astrophysics

6

Cosmic Dust, Electric Charge, Field Emission, Interstellar Matter, Electron Emission, Equipotentials, Ion Emission, Levitation, Spheres, Cosmic Dust, Interplanetary Dust, Grains, Charged Particles, Electrons, Ions, Emissions, Electrical Properties, Models, Electric Fields, Plasmas, Electrostatic Effects, Surface, Magnetosphere

Scientific paper

An analytical model is built up to describe the effects of 'fluff' on the potential and the electric field on and close to a charged spherical body. The consequences are investigated for dust grains biased, in plasmas, at potential positive or negative but large enough for electron or ion emission to be active. Electron emission reduces the equilibrium (floating) potential whereas ion emission destroys the fluff or even the grain itself. Effects of grain encounters are discussed in these cases. The model is also used to describe the electric levitation of small-solid particles from a larger body. Finally the case of a body with recesses is considered.

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