In this paper the transient analysis of pulsed electromagnetic field i
n a two-dimensional domain filled by ions and charged powders is carri
ed out by the Finite Differences Time Domain method. Part of the non-l
inear partial differential equations of the model are solved by means
of an implicit scheme, the remaining part by an explicit upwind scheme
. The disadvantages of other possible solutions are discussed, For an
application the comparison between calculated and measured results is
considered.