First user operation at FLASH2

Since Friday, 8 April at 12:14 h FLASH is running in parallel operation for two user experiments, one in the experimental hall "Albert Einstein" (FLASH1) and one in the new hall "Kai Siegbahn" (FLASH2). First official FLASH2 users are the researchers around Sven Toleikis and Andreas Przystawik at beamline FL24 who focus the FLASH2 pulses with the help of a multilayer mirror onto rare gas clusters and study the fluorescence of the resulting nanoplasma as a function of cluster size.