Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.92: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
An XUV and soft X-ray split-and-delay unit for FLASH II — •Dennis Eckermann1, Sebastian Roling1, Matthias Rollnik1, Marion Kuhlmann2, Elke Plönjes2, Frank Wahlert1, and Helmut Zachairas1 — 1Physikalisches Institut, Universität Münster, Wilhelm-Klemm Straße 10, 48149 Münster, Germany — 2Deutsches Elektronen Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
An XUV and soft X-ray split-and-delay unit is built that enables time-resolved experiments covering the whole spectral range of FLASH II from hν = 30 eV up to 2500 eV. With wave front beam splitting and grazing incidence angles a maximum delay of -6 ps < Δt < +18 ps will be possible with a sub-fs resolution. Two different coatings are required to cover the complete spectral range. Therefore, a design that is based on the three dimensional beam path of the SDU at BL2 at FLASH has been developed which allows choosing the propagation via two sets of mirrors with these coatings. A Ni-coating will allow a total transmission on the order of T = 55 % for photon energies between 30 eV and 600 eV at a grazing angle θ = 1.8∘ in the variable delay line. In the fixed delay line the grazing angle is set so θ = 1.3∘. With a Pt-coating a transmission of T > 13 % will be possible for photon energies up to 1500 eV. For a future upgrade of FLASH II the grazing angle can be changed to θ = 1.3∘ in order to cover a range up to hν = 2500 eV.