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Particle flows to shape and voltage surface discontinuities in the electron sheath surrounding a high voltage solar array in LEOThis paper discusses the numerical modeling of electron flows from the sheath surrounding high positively biased objects in LEO (Low Earth Orbit) to regions of voltage or shape discontinuity on the biased surfaces. The sheath equations are derived from the Two-fluid, Warm Plasma Model. An equipotential corner and a plane containing strips of alternating voltage bias are treated in two dimensions. A self-consistent field solution of the sheath equations is outlined and is pursued through one cycle. The electron density field is determined by numerical solution of Poisson's equation for the electrostatic potential in the sheath using the NASCAP-LEO relation between electrostatic potential and charge density. Electron flows are calculated numerically from the electron continuity equation. Magnetic field effects are not treated.
Document ID
19910034757
Document Type
Conference Paper
Authors
Metz, Roger N. (Colby College Waterville, ME, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
SPACECRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 91-0603
Funding Number(s)
CONTRACT_GRANT: NAG3-576
Distribution Limits
Public
Copyright
Other