Abstract
Introduction Modern microfocus X-ray sources define the state-of-the-art for a number of applications such as protein crystallography and smallangle scattering in the home lab. These sources have anode spot sizes of 100 μm or smaller. They are usually combined with Montel multilayer optics as beam-shaping devices that image the source spot onto the position of the sample, magnifiying the beam to a suitable size. Multilayer optics deliver a parallel or focused monochromatic beam. Below results of three different microfocus sources are shown: a sealed tube source, a rotating anode source, and a liquid metal jet X-ray source. The power densities of these three X-ray sources range from several kW/mm2 for the sealed tube source, to about 20 kW/mm2 for the rotating anode source, and to more than 500 kW/mm2 for the liquid metal jet X-ray source.
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