Abstract:
The existence of large amplitude double layers in a plasma composed of cold negative
dust, adiabatic positive dust, non-thermal ions and Boltzmann electrons is investigated using the
Sagdeev pseudopotential technique. Both positive potential and negative potential double layers are
found to be supported by the model. The variation of the maximum amplitudes of the double layers
and corresponding Mach numbers are examined as a function of various plasma parameters. In
particular, we investigate to what extent ion non-thermal effects are required for positive potential
double layers to occur.
