Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Cluster (with MO)
A 4.7: Vortrag
Montag, 18. März 2013, 12:30–12:45, F 102
Extreme ultraviolet fluorescence spectroscopy of pure and core-shell rare gas clusters at FLASH — •Lasse Schroedter1, Andreas Kickermann1, Andreas Przystawik1, Marcus Adolph2, Maria Krikunova2, Maria Müller2, Tim Oelze2, Daniela Rupp2, Christoph Bostedt3, Thomas Möller2, and Tim Laarmann1 — 1Deutsches Elektronen-Synchrotron, DESY Photon Science, Hamburg, Germany — 2Institut für Optik und Atomare Physik, Technische Universität Berlin, Germany — 3SLAC National Accelerator Laboratory, Linac Coherent Light Source, USA
Rare gas clusters exposed to strong laser fields at short wavelength have attracted considerable interest in the last decade. The most common way to study the interaction is by time-of-flight spectroscopy of the resulting charged particles [1]. However, recent imaging experiments give evidence that the measured mass spectra do not reflect the charge states that are initially formed [2]. We present experiments on pure and core-shell Xe and Ar clusters to analyze the initially produced charge states by their extreme ultraviolet fluorescence. The clusters were excited by strong free-electron laser pulses from FLASH at 13 nm. Characteristic fluorescence of multiply charged species reveals detailed information on energy deposition and redistribution as a function of cluster size and FEL intensity.
[1] M. Hoener et al., J. Phys. B: At. Mol. Opt. Phys. 41 (2008), 181001 [2] C. Bostedt et al., Phys. Rev. Lett. 108 (2012), 093401