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Article
Author(s)
Roger Godard, and John D. de Boer
Full-Text PDF XML 796 Views
DOI:10.17265/2159-5348/2020.02.001
Affiliation(s)
Department of Mathematics and Computer Science, RMCC, Kingston, Canada
ABSTRACT
The development of space science has generated important computer codes
for the simulation of the interaction between complex space structures
(artificial satellites, solar panels, etc.) and the surrounding plasma. The
basic equation to be solved is the Poisson equation for the electric potential
around a structure. Here, we try to study analytically the shadowing effect of
a spacecraft on an electrode for the electron number density and the electron
temperature. We suggest that the electron temperature should be taken as a
variable and not as a parameter. However, its computation involves the
knowledge of the histogram of the distribution of the frequencies of the
electron velocities inside the computational cells. Also, we have illustrated the possibilities of artefacts due to the
design and geometry of scientific instruments for the measurement of the
electron number density and the electron temperature in the ionosphere. We
suggest an optimal design for an electrode and its guard ring.
KEYWORDS
Plasma physics, particle-in-cell methods (PIC), electron number density, definition of the electron temperature.
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