Abstract

Geometric properties and construction of the spiral collimator are discussed. The expression for the efficiency of power conversion of a divergent soft x-ray point source into a parallel beam is obtained. The efficiency of the spiral collimator is shown to be up to 30–90% in the whole soft x-ray spectral range. This efficiency is limited only by the fundamental reason: x-ray radiation absorption in the mirror coating of the spiral collimator. In this sense, the spiral collimator is more effective than any known x-ray optical collimation system with one or manifold reflections.

© 1991 Optical Society of America

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