  The results of experimental investigations of inhomogeneities of
gas-discharge nonneutral electron plasma obtained by using the nonperturbing
experimental methods [N.A. Kervalishvili, arXiv:1502.02516 [physics.plasm-ph]
(2015)] have been presented. Inhomogeneities are the dense solitary vortex
structures stretched along the magnetic field, the lifetime of which is much
greater than the time of electron-neutral collisions. The processes of
formation, evolution and dynamics of vortex structures were studied. The
periodic sequence of these processes is described for different geometries of
discharge device.
