Abstract
This contribution presents the laser infrastructure concept of the Soft X-ray Port (SXP) instrument at the European X-ray Free Electron Laser (XFEL) for day one operation. This scientific platform is conceived as an open port complementing the scientific scope of the other two, already operating baseline instruments at the SASE 3 soft x-ray undulator focusing on atomic, molecular and non-linear optical (SQS) as well as condensed matter physics (SCS). The main driving force behind SXP originates from the time-resolved X-ray photo-electron spectroscopy community contemplating key questions in the dynamics of materials science at interfaces. Nonetheless, proposals to investigate high-valent metal intermediates in biological and inorganic catalysts for chemical bond activation by means of fluorescence spectroscopy as well as research on highly charged ions in the light of astrophysics are also pursued. The outstanding capabilities of the European XFEL pave the way for ultrafast pump-probe investigations at the SXP instrument combining intense and tunable soft X-rays with versatile optical laser capabilities, which are provided by two synchronized femtosecond laser systems, whose wavelength ranges can be extended into the infrared as well as extreme ultraviolet region.
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