Electromagnetic radiation and instability of superthermal particles in a magnetoactive plasma with strong small-scale irregularities

The electromagnetic radiation of superthermal electrons in a magnetoactive plasma with strong small-scale irregularities is calculated. The emissive power of such a medium is found. The flux density of electromagnetic radiation I_f is determined for an optically thin medium. The values of I_f are estimated for different ionospheric conditions. The induced radiation of a directed electron beam of charged particles in a magnetoactive plasma with such irregularities is studied. The gain (absorption) factor is derived. The possibility of electromagnetic instability in different ionospheric conditions is analyzed.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 39, No. 3, pp. 286–300, March, 1996.