Explosion dynamics of sucrose nanospheres monitored by time of flight spectrometry and coherent diffractive imaging at the split-and-delay beam line of the FLASH soft X-ray laser

Asawari D. Rath, Nicusor Timneanu, Filipe R N C Maia, Johan Bielecki, Holger Fleckenstein, Bianca Iwan, Martin Svenda, Dirk Hasse, Gunilla Carlsson, Daniel Westphal, Kerstin Mühlig, Max Hantke, Tomas Ekeberg, M. Marvin Seibert, Alessandro Zani, Mengning Liang, Francesco Stellato, Richard Kirian, Richard Bean, Anton BartyLorenzo Galli, Karol Nass, Miriam Barthelmess, Andrew Aquila, Sven Toleikis, Rolf Treusch, Sebastian Roling, Michael Wöstmann, Helmut Zacharias, Henry N. Chapman, Saša Bajt, Daniel DePonte, Janos Hajdu, Jakob Andreasson

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Abstract

We use a Mach-Zehnder type autocorrelator to split and delay XUV pulses from the FLASH soft X-ray laser for triggering and subsequently probing the explosion of aerosolised sugar balls. FLASH was running at 182 eV photon energy with pulses of 70 fs duration. The delay between the pump-probe pulses was varied between zero and 5 ps, and the pulses were focused to reach peak intensities above 1016 W/cm2 with an off-axis parabola. The direct pulse triggered the explosion of single aerosolised sucrose nano-particles, while the delayed pulse probed the exploding structure. The ejected ions were measured by ion time of flight spectrometry, and the particle sizes were measured by coherent diffractive imaging. The results show that sucrose particles of 560-1000 nm diameter retain their size for about 500 fs following the first exposure. Significant sample expansion happens between 500 fs and 1 ps. We present simulations to support these observations.

Original languageEnglish (US)
Pages (from-to)28914-28925
Number of pages12
JournalOptics Express
Volume22
Issue number23
DOIs
Publication statusPublished - Nov 17 2014
Externally publishedYes

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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