Energy distribution in the concentration field of a two-mirror device with a paraboloidal back reflector

The effective disposition of the heating plane in the region of convergence of twice-reflected rays (Z-max - Z-min) in a two-mirror device with a paraboloidal back reflector is ascertained, and the energy distribution over the heating spot is determined. It is found that the use of the paraboloidal back reflector degrades the characteristics of a two-mirror system by a factor of several times as compared to a hyperboloidal back reflector. The maximum energy density with the paraboloidal reflector, however, remains high enough for high-temperature processes and experiments to be conducted.