Formation of structures from dusty clusters in cryogenic plasma of glow discharge

Was discovered the formation of structures consisting from structures of clusters in dusty plasma at a temperature of liquid nitrogen. The dependence of the reduced electric field E/N in the positive column of a discharge from gas temperature was experimentally measured. Depending on the pressure of neon were observed the different structural transitions in the regions of growing current-voltage characteristics at low discharge currents 0.01≤ I ≤ 1 mA. Were determined the three specific regions of structural transitions. In the region 1 there appear the ordered structures with the lattice similar to the hexagonal with 1D, 2D or 3D clusters located in the sites of lattice. The dust particles forming 2D or 3D cluster, in turn, were in the ordered state. The transition from 2D to 3D clusters was observed at the increase of gas pressure. In the region 2 the destruction of crystals consisting of 3D clusters and the destruction of ordered 3D clusters into individual threadlike (1D) clusters was observed. In the region 3 the dense disordered structures consisting from threadlike clusters were observed. It was found that the regions of existence of structured clusters and the regions of structural transitions, were characterized by the higher values of the reduced longitudinal electric field strength than the regions of destruction of ordered structures.