Exact orbital motion theory of the shielding potential around an emitting, spherical body
Authors:
- 26 May 2005
- journal article
- conference paper
- Published by AIP Publishing in Physics of Plasmas
- Vol. 12 (6) , 062102
Abstract
A kinetic theory for the equilibrium of an unmagnetized plasma consisting of electrons and ions surrounding a spherical body emitting electrons (due to thermionic emission, photoemission, or secondary emission) is presented. The theory is valid for positively charged bodies, neglects collisions of the plasma particles, and is formulated for profiles of the shielding potential presenting an attractive well. Particle-in-cell simulations are shown to be in good agreement with the theory. An approximated criterion is derived to determine the presence of the potential well.Keywords
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