Results of the experimental investigation of Kumakhov polycapillary lenses at K(alpha ) lines of Cr, Cu, Mo, Ag are presented. The main parameters of more than 20 lenses, namely, transmission, its dependence on the energy and capture angles, distribution of intensity in the lens focal spots, and dependence of the focal spots on the energy, were investigated. It is noted, that the level of the lens manufacturing achieved at the Institute for Roentgen Optics is very high.
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