A computer experiment to study the charging process of dust grains in negative ion plasma

الملخص EN

This work presents a computer studying to simulate the charging process of a dust grain immersed in plasma with negative ions.

The study based on the discrete charging model.

The model was developed to take into account the effect of negative ions on charging process of dust grain.

The model was translated to a numerical calculation by using computer programs.

The program of model has been written with FORTRAN programming language to calculate the charging process for a dust particle in plasma with negative ion, the time distribution of a dust charge, number charge equilibrium and charging time for different value of ηe (ratio of number density of electron to number density of positive ion).