  The model of gas-discharge nonneutral electron plasma has been considered, in
which the electron density is limited by non-linear processes initiated by
diocotron instability and it does not depend on the mechanism of electron
transport across the magnetic field. The model describes well the
characteristics of electron sheath and the current characteristics of discharge
both, in magnetron geometry and in the geometry of inversed magnetron, and it
allows us to describe quantitatively the influence of anode misalignment on the
discharge electron sheath for the first time. The scope of applicability of the
proposed model, as well as its relation with other models of electron sheath is
studied.
