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Abstract
The gas-discharge media with an inverse distribution of neutral and charged particles are of great interest for science and practical applications. A striking example of this is the laser operation. In the second half of the last century, a number of articles used to consider the possibility of forming an inverse electron distribution function (EDF), resulting in negative plasma conductivity. By analogy with the inverse population of excited states in lasers, such a medium will amplify electromagnetic waves. One of the first papers was the work [1]. The most complete theoretical study was presented in [2]. It is shown that with an inverse EDF in the low-energy part in gases with a Ramsauer minimum of the elastic scattering cross section stationary absolute negative conductivity will be formed.
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