Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Interaction with VUV and X-ray light I
A 30.4: Vortrag
Mittwoch, 19. März 2014, 15:00–15:15, BEBEL E42
Ultrafast nanoplasma dynamics in large clusters driven by highly intense laser pulses — •L. Flückiger1, T. Gorkhover1, M. Müller1, M. Krikunova1, M. Sauppe1, S. Schorb2, S. Düsterer3, M. Harmand3, H. Redlin3, R. Treusch3, C. Bostedt2, D. Rupp1, and T. Möller1 — 1Technische Universität, Berlin — 2LCLS, SLAC National Accelerator Laboratory — 3Deutsches Elektronen-Synchrotron, Hamburg
In a newly developed experimental approach we study the dynamics of individual clusters irradiated with highly intense laser pulses on three different timescales, from femto over pico to nanoseconds. In a two-color pump-probe setup single-shot diffractive imaging with simultaneous ion spectroscopy were performed on single xenon clusters. This technique enables to reveal cluster morphology and energy absorption as well as ionization and fragmentation dynamics of the same target without integration over focal-volume and cluster-size distribution [1].
Highly ionized by a 800 nm Ti:Sa pulse a large cluster transforms into a hot dense nanoplasma expelling surface ions by hydrodynamic forces. Subsequent the fully screened interior of the sample recombines completely. What remains is a cold skinned and neutral core. Its fragmentation evolution is probed directly by imaging snapshots with a 90 eV free-electron-laser pulse. This study helps to shed new light on cluster ionization dynamics and laser induced sample damage.
[1] Gorkhover et al., PRL 108, 245005 (2012)