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Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 35: Poster: Interaction with VUV and X-ray light

A 35.16: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

VUV Studies on Doped Helium Nanodroplets — •Raphael Katzy1, Aaron LaForge1, Michele Alagia6, Lorenzo Avaldi2, Carlo Callegari3, Marcello Coreno2, Michele Devetta4, Marcel Drabbels5, Antti Kivimaki2, Viktor Lyamayev7, Tommaso Mazza7, Thomas Möller8, Marcel Mudrich1, Yevheniy Ovcharenko8, Paolo Piseri4, Kevin Prince3, Robert Richter3, Frank Stienkemeier1, Stefano Stranges9, and Michele DiFraia101Universität Freiburg, Germany — 2CNR-IMIP Rome, Italy — 3Sincrotrone Trieste, Italy — 4Univerity of Milan, Italy — 5EPFL Lausanne, Switzerland — 6CNR-IOM Trieste, Italy — 7European XFEL GmbH, Germany — 8Technische Universität Berlin, Germany — 9University of Rome "Sapienza", Italy — 10University of Trieste

We performed measurements on doped helium nanodroplets by VUV-seeded FEL FERMI@Elettra.

In the strong field of the FEL clusters gain large amounts of enegy leading to highly excited and ionized states. Nanoplasma is formed and finally leads to a Coulomb explosion of the cluster. Going to short wavelengths in the XUV range the the plasma formation is not uniform anymore. Utilizing doped clusters we observe strong ionization at the surface while in the center of the cluster plasma formation is reduced due to recombination.

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