Abstract: An x-ray lens designed to collimate x rays from a divergent source has been characterized. The lens is 10 cm long and consists of 919 polycapillary fibers. The diameter of each fiber is 400 microns with a channel size of 15 microns. The solid angle of collection of the lens is 40 msterad. The focal distance of the lens is 57 mm. The transmission and divergence properties of the lens are discussed for different x-ray energies and source conditions. !16
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