A. V. Bogatskaya
A. M. Popov
Moscow State University and P. N. Lebedev Physical Institute, Russian Federation
Amplification of an Electromagnetic Radiation, Electron Energy Distribution Function, Kinetic Boltzmann Equation, Electronegative Gases.
Photonics, Optics and Laser Technology
It is demonstrated that low-temperature weakly-ionized nonequilibrium plasma created by a high-energy electron beam in gases (gas mixtures) with Ramsauer minimum in a transport cross section and effective attachment of slow electrons can be used as a medium for amplification and generation of electromagnetic radiation in subterahertz frequency band. Analysis of the electron energy distribution function (EEDF) in Xe – F2 mixture is performed. Energy interval with growing EEDF is found to exist in such a mixture. Such an interval provides the existence of population inversion of the electron spectrum in continuum and is responsible for positive value of a gain factor of microwave radiation. A gain factor depending on an amplified radiation frequency and plasma parameters is analysed.