Recent advances on in situ materials characterization using ultra high-speed x-ray imaging at The European Synchrotron - ESRF

摘要

Mega-hertz (MHz) pulse repetition rates of intense x-ray flashes are characteristic to storage ring-based synchrotronlight sources. When combined with an indirect x-ray image detection scheme composed of a fast-decayscintillator and an ultra high-speed CMOS camera, this allows multiple-frame tracking of transient processes inoptically opaque objects. The temporal resolution of this so-called single-bunch imaging is ～100 ps, which isequivalent to the width of an electron bunch in the storage ring. A train of x-ray pulses can also be capturedcontinuously (multiple-bunch imaging); the temporal resolution depends on the camera’s integration windowand several hundred nanoseconds are frequently reached. At the European Synchrotron – ESRF, beamline ID19,single- and multiple-bunch x-ray imaging up to millions frames per second rates are now routinely performedwithin the user programme for various in situ materials characterization. In this presentation, we will describeour strategies to push the limits of time-resolved hard x-ray imaging at ESRF.