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A: Fachverband Atomphysik

A 39: Poster: Atomic clusters

A 39.4: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.V

XUV-fluorescence spectroscopy on rare gas clusters irradiated by intense XUV radiation — •T Oelze¹, M Adolph¹, L Flückiger¹, T Gorkhover¹, M Krikunova¹, M Müller¹, L Nösel¹, Y Ovcharenko¹, R Richter¹, D Rupp¹, M Sauppe¹, S Schorb^1,3, D Wolter¹, A Przystawik², L Schrödter², C Bostedt^1,3, T Laarmann², and T Möller¹ — ¹TUB — ²FLASH@DESY — ³LCLS@SLAC

Free-electron lasers like FLASH combine short wavelengths with a high number of photons in ultrashort coherent pulses, extending the possibilities to study the interaction between intense light and matter. Rare gas clusters as size scalable gas phase objects are used in our studies. By analyzing different ionization products such as charged particles as well as scattered and fluorescence light we strive to achieve a complete picture of ionization and disintegration dynamics and of the corresponding time scales. In a recent experiment at FLASH the fluorescence spectra of rare gas clusters excited with 90 eV photons exhibited a large number of lines between 10 nm and 70 nm. In order to understand their origin, we plan to analyze the fluorescence of the clusters in an altered setup where clusters are excited by high kinetic energy electrons from an electron gun. By tuning the energy, selected charge states can be addressed. The transitions can be used to assign the lines measured at FLASH to the different charge states and to gain further insight into the charge distribution of the nanoplasma. The setups will be discussed and first results will be shown.