Computer modeling of electromagnetic radiation interaction with nanotubes

It is offered for microwave radiations way of the reinforcement in active medium. Pumping the medium is produced using non-stationary electric field on sprayed midair nanotubes. Analytical importance of radiation reinforcements factor is received. Under $c_0\approx10^{-3}$ three-dimentional share of nanotubes to account of the use the pulsed source of the voltage to big power (energy density $\sim 200$ J/m$^3$) weak signal gain factor $\Gamma_0=0,055$ m$^{-1}$. One of the possible mechanism of the reinforcement microwave radiations is considered in spatial resonator.