Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 31: Poster Session III
A 31.44: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG1
Correlated electron dynamics in expanding nanoplasmas — •Tim Oelze1, Bernd Schütte2, Jan Lahl1,6, Jan P. Müller1, Maria Müller1, Arnaud Rouzée2, Marc J. J. Vrakking2, Marek Wieland3,4, Ulrike Frühling3,4, Markus Drescher3, Alaa Al-Shemmary5, Torsten Golz5, Nikola Stojanovic5, and Maria Krikunova1 — 1TU Berlin — 2MBI Berlin — 3Uni Hamburg — 4CUI Hamburg — 5DESY Hamburg — 6Lund University
When clusters get hit by intense laser pulses a nanoplasma is created within the clusters. Finally the clusters disintegrate while emitting electrons and photons.We investigate the complex nanoplasma dynamics of clusters that are irradiated with intense laser pulses by analysing their electron kinetic energy spectra. In distinct studies we examined those spectra of atomic and molecular clusters of oxygen, carbon dioxide, xenon and krypton as well as xenon-argon mixed clusters upon irradiation of intense near-infrared laser pulses or extreme ultraviolet pulses from the free electron laser FLASH. Pump-probe measurements and terahertz streaking were employed to observe autoionization and correlated electronic decay processes from previously unknown bound states in the samples. Terahertz streaking shows that these states are depopulated at least picoseconds to nanoseconds after the interaction of the respective laser pulses with the samples. The occurence of those late decay processes in a variety of excited cluster samples and by different sources of excitation suggests that those mechanisms are of general relevance for the relaxation of laser induced nanoplasmas.