HED (High Energy Density Science) (IMAGE) GSI Helmholtzzentrum für Schwerionenforschung GmbH Caption The experiment set-up HED (High Energy Density Science). Credit © European XFEL/Jan Hosan Usage Restrictions Free to use, if the copyright is clearly stated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.