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20.01.2023 / 10:00 - 11:00 / Hamburg, Lecture Hall (CSSB, Bldg. 15)
SeminarScience at Infrared and THz Free Electron Lasers
Britta Redlich (FELIX Laboratory, Radboud University, Nijmegen, The Netherlands)
The FELIX free electron lasers at Radboud University in Nijmegen, the Netherlands provide widely tunable, intense and short infrared and THz pulses that are ideal to investigate structure and dynamics of matter. Over the years IR FELs have shown to contribute to a wide range of scientific areas such as physics, chemistry, material science and biology. Primary applications of IR FELs are found in areas benefitting either from the high brightness or the high fluence offered by the free electron lasers. Infrared and THz radiation acts as a spectrometric tool that probes important excitations like vibrations, electronic and magnetic transitions in molecules and (soft)condensed matter and allows scientists to characterize, in exquisite detail, physical and chemical properties. In this presentation I will introduce the infrastructure and instrumentation, which comprises four free electron lasers – FLARE, FELIX-1, FELIX-2 and FELICE (tuning range from 3 – 1500 micron or 100 – 0.2 THz) – of which three FEL beams can be operated in parallel. Our 16 user laboratories are equipped with advanced infrastructure such as (cryogenic) ion traps, molecular beam machines, degenerated and two-color non-linear optics end stations and a connection to the 33T magnet at the adjacent High Field Magnet Laboratory. Scientists can probe the molecular, orbital, electronic and spin excitations of many materials with scientific and technological relevance. Examples will be given from recent experiments in various areas of science including structure identification of novel biomarkers, reaction pathways relevant to astrochemistry and IR light-induced switching in magnetic materials.
