Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 25: Poster Session I

A 25.4: Poster

Tuesday, March 6, 2018, 16:15–18:15, Redoutensaal

A grazing-incidence 4-quadrant split-mirror setup for multidimensional spectroscopy experiments in the XUV — •Carina da Costa Castanheira, Marc Rebholz, Thomas Ding, Lennart Aufleger, Patrick Rupprecht, Paul Birk, Christian Ott, and Thomas Pfeifer — Max-Planck Institut für Kernphysik, Heidelberg, Germany

In this work the home-built four-quadrant split-mirror dedicated for grazing-incidence multidimensional spectroscopy experiments in the near infrared (NIR) and extreme ultraviolet (XUV) is characterized by an interferometric measurement. For this purpose the stability was investigated with a HeNe laser and the temporal overlap between the mirrors themselves was determined using a femtosecond Ti:Sa laser system. Beginning with analyzing stability issues and finding temporal overlap between the mirrors, this work continued with first measurements on NIR-NIR-XUV four-wave-mixing in neon in the extreme ultraviolet (XUV) spectral region. Furthermore, first nonlinear XUV-only proof-of-principle experiments were carried out with this setup at the free-electron laser facility FLASH in Hamburg (Germany). These experiments can be seen as a working proof of the four-quadrant split-mirror setup which serves as a basis for future progress in four-wave-mixing experiments with our setup at both mixed NIR/XUV as well as XUV-only spectral regions.