Abstract: | We study the problem of the behavior of a plasma bounded longitudinally by an absorbing sheath. This model contains charged
particles (electrons and ions) moving subject to a self-consistent electrostatic field. New particle pairs are generated in
the region of a distributed source. As a numerical model we used the electrostatic “particle-in-cell” method supplemented
by the Emmert model for a bulk source and the algorithm of binary Coulomb collisions using the Monte Carlo method. We give
a mathematical statement of the problem. The computations were carried out using the direct implicit method with the “explicit
limit” time step. The results of numerical simulation of this system are given. We consider the formation and evoluiton of
potential structures (multiple weak nonmonotonic double layers). Five figures. Bibliography: 35 titles.
Translated fromProblemy Matematicheskoi Fiziki, 1998, pp. 75–89. |