Model of plasma sheath region using variable particle weights

The interaction of low temperature plasma with a probe is studied in this contribution. We would like to describe the transport of charged particles through the sheath region. A model of this sheath region is created. In the model we describe ions and electrons by molecular dynamics, with Monte Carlo method for collisions. This model is one dimensional in space and two dimensional in the velocity space and was modified for planar, spherical and cylindrical geometry. To reduce the number of particles, we introduced variable weights of particles. This approach enables to speed up the algorithm and to correctly compute the values of the electric current.