Researchers from the EUROfusion consortium, including JSI researchers, used the Joint European Torus (JET) device to release a record 59 MJ of sustained fusion energy. The breakthrough achievement on JET, the world’s most powerful operational fusion facility based in Oxford, almost tripled the previous fusion energy record. These experiments are a major boost for Iter, the larger and more advanced version of JET. Iter is an experimental fusion reactor under construction in southern France. The EUROfusion consortium, co-funded by the European Commission, integrates 4800 researchers from 30 research organisations. 8 departments and more than 40 researchers from Jožef Stefan Institute are involved in EUROfusion consortium. Dr. Boštjan Končar, R4, SFA: »The achievement is also the result of many years of hard work by Slovenian researchers, especially in the field of neutron transport calculations, diagnostics, analyses and preparation of fusion experiments.”