POSSIBILITY OF NEGATIVE DIFFERENTIAL PLASMA CONDUCTIVITY IN 2 INTERVALS OF THE ELECTRIC-FIELD VALUES

Mixtures are found in which the negative differential conductivity (ND C) of weakly ionized gases exists in two intervals of the electric fie ld values. It is shown that, in binary mixtures, this effect exists on ly in the GO-Ar (Kr) mixture. Most probably, the NDC in two different intervals of the field values can occur in three-component mixtures of two molecular gases and heavy inert gas. The vibrational excitation o f molecules and existing uncertainty in the cross section values only slightly affect the double-humped dependence of the drift velocity on the electric field.