[en] The X-ray detector was built with a commercially manufactured SEC vidicon. The output window of the vidicon was coupled via demagnifying fiber optic cone to the output window of a commercially manufactured Varain image intensifier tube. This was then coupled to a Gd₂O₂S fluorescence screen. To show the function of the integrating X-ray detector typical small angle scattering experiments was made. Also a new readout technique for measurements of high-contrast, high-flux X-ray patters has been developed and was used in measurements with a silica aerogel. (orig./BHO)