  The conditions for the excitation of current and voltage oscillations in the
plasma of a three-electrode current and voltage stabilizer are experimentally
investigated. It was found that in the regimes under consideration, the plasma
has negative conductivity, which causes oscillations. A highly efficient method
for suppressing plasma instabilities is proposed, based on controlling the sign
of differential plasma conductivity by adjusting the concentration of slow
electrons using an external electrode. The proposed method makes it possible to
achieve a high level of stability of the energy characteristics of the
stabilizer at a discharge current density of up to 5 A/cm2 and a power of 500
W/cm2.
