Description
The fastest pixel array X-ray detectors can record images with nanosecond resolution. This is accomplished by storing only a few images in in-pixel memory cells. In this study, we demonstrate the nanosecond resolution over a large number of images by operating a prototype detector TEMPUS in an event driven mode (1). The performance of this mode is tested by measuring the Brownian dynamics of colloidal nanoparticles. We can achieve sub-100 ns time resolution and overcome the pixel dead time by applying a cross-correlation analysis of the neighboring pixels (2). The detector and the approach used in this work are not only suitable for fast XPCS measurements with ESRS-EBS (3) but can also be extended to study time-resolved fast processes with diffraction, scattering, or imaging techniques.
