This animated explainer video shows how the experiment was carried out by researchers at the University of Göttingen, Deutsches Elektronen-Synchroton (DESY) and the European X-Ray Free-Electron Laser (European XFEL). An infra-red laser beam is tightly focused into a water-filled container, igniting a plasma spark; the subsequent shock wave and cavitation bubble are imaged by an X-ray flash. From this, the density inside the bubble and the surrounding shock wave is computed.
Ponz-Segrelles G, Glasby CJ, Helm C, et al. Integrative anatomical study of the branched annelid Ramisyllis multicaudata (Annelida, Syllidae). Journal of Morphology. 2021;1–17. https://doi.org/10.1002/jmor.21356