Finite Amplitude Double-Layer Solutions In Two-Component-Charged Dusty Plasmas With Trace Electrons And Ions

摘要

Finite amplitude double-layer solution in unmagnetized two-component dusty plasma is shown to exist when a very small amount of electrons and even smaller amount of light ion component are present. Assuming that the constituents of dusty plasmas are warm electrons, warm positive light ions, and an admixture of negatively and positively charged cold dust grains which are simultaneously present, it is shown that stationary solutions of the fluid equations combined with Poisson's equation can be expressed in terms of the energy integral of a classical particle with a modified Sagdeev potential. Conditions under which double-layers arise are given. In particular, we have applied the theory in the laboratory plasma and we can predict that a double-layer might be possible to be launched if a trace ions component is added.