Equations for the motion of an individual dust grain in the double layer of
a negatively charged cylindrical probe in a glow discharge plasma are deri
ved and solved numerically. The distribution of the electric potential near
the probe is determined, and the grain charge is calculated as a function
of the distance from the probe for different probe potentials. Tile traject
ories of grains with different initial energies are traced. An analysis of
the gl-ain trajectories shows that, at a certain distance from the probe, h
igh-energy grains may be recharged; i.e., the grain charge may change sign.
The grains are found to have no direct effect on the probe current in a du
sty plasma of a glow discharge. (C) 2001 MAIK "Nauka/Interperiodica".