5·î23Æü(ÌÚ) 15:30 -- 17:00 Dr. Vladimir Latocha(µþÅÔÂç³ØÂç³Ø±¡ ¹©³Ø¸¦µæ²Ê)
``Two problems in the Modeling of a Stationary Plasma Thruster''
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We will outline some work performed in the field of plasma physics, more
precisely on the modeling of a Stationary Plasma Thruster (SPT). Firstly,
we will explain the motivation of having plasma thrusters for the attitude
control of geostationary satellites. Then we will give some results
obtained in the study of two different problems, namely the simulation
of the electron population, and the resolution of a highly anisotropic
elliptic problem. For the simulation of the electrons, we developed an
asymptotic model relying on kinetic equations, and the resulting code
provides an alternative to the very CPU-expensive Monte Carlo method. We
obtain comparable results while the execution time is divided by a factor
about 100. In a second time, we studied a highly anisotropic problem in
two dimensions, which was investigated after having proposed a finite
volume scheme. This work is still under progress.