Ingold, GerhardAbela, RafaelArrell, ChristopherBeaud, PaulBohler, PirminCammarata, MarcoDeng, YunpeiErny, ChristianEsposito, VincentFlechsig, UweFollath, RolfHauri, ChristophJohnson, StevenJuranic, PavleMancini, Giulia FulviaMankowsky, RomanMozzanica, AldoOggenfuss, Roland AlexPatterson, Bruce D.Patthey, LucPedrini, BillRittmann, JochenSala, LeonardoSavoini, MatteoSvetina, CristianZamofing, ThierryZerdane, SerhaneLemke, Henrik Till2019-06-182019-06-182019-06-182019-05-0110.1107/S160057751900331Xhttps://infoscience.epfl.ch/handle/20.500.14299/157577WOS:000467526100030The Bernina instrument at the SwissFEL Aramis hard X-ray free-electron laser is designed for studying ultrafast phenomena in condensed matter and material science. Ultrashort pulses from an optical laser system covering a large wavelength range can be used to generate specific non-equilibrium states, whose subsequent temporal evolution can be probed by selective X-ray scattering techniques in the range 2-12keV. For that purpose, the X-ray beamline is equipped with optical elements which tailor the X-ray beam size and energy, as well as with pulse-to-pulse diagnostics that monitor the X-ray pulse intensity, position, as well as its spectral and temporal properties. The experiments can be performed using multiple interchangeable endstations differing in specialization, diffractometer and X-ray analyser configuration and load capacity for specialized sample environment. After testing the instrument in a series of pilot experiments in 2018, regular user operation begins in 2019.Instruments & InstrumentationOpticsPhysics, AppliedPhysicsfelx-raypump-probetime-resolvedfree-electron laserdensity-wave orderlight-induced superconductivitypatterned silicon chippolarization controlarrival-timenarrow-bandthz-pulsescatteringdynamicstext::journal::journal article::research article