4–5 Nov 2021
Helmholtz-Zentrum Dresden-Rossendorf
Europe/Berlin timezone

Surface dynamics of warm dense plasmas upon high-intensity laser irradiation investigated by grazing-incidence x-ray surface scattering

4 Nov 2021, 14:15
35m
Building 106, Hörsaal room 255 (Helmholtz-Zentrum Dresden-Rossendorf)

Building 106, Hörsaal room 255

Helmholtz-Zentrum Dresden-Rossendorf

Bautzner Landstraße 400 01328 Dresden Zoom-Link: https://us02web.zoom.us/j/86275700441?pwd=Q29VUlF2MXVnQUlVL1M0TU9KZmd4QT09 Meeting ID: 862 7570 0441 Passcode: PuBTU9
Talk Talks

Speaker

Lisa Randolph (Universität Siegen)

Description

Observing ultrafast laser-induced structural changes in nanoscale systems is essential for understanding the dynamics of intense light-matter interactions. For laser intensities on the order of $10^{14}$W/cm$^2$, highly-collisional plasmas are generated at and below the surface. Subsequent transport processes such as heat conduction, electron-ion thermalization, surface ablation and resolidification occur at picosecond and nanosecond time scales. Imaging methods, e.g. using x-ray free-electron lasers (XFEL), were hitherto unable to measure the depth-resolved sub-surface dynamics of laser-solid interactions with appropriate temporal and spatial resolution. Here we demonstrate picosecond grazing-incidence small-angle x-ray scattering (GISAXS) from laser-produced plasmas using XFEL pulses. Using multilayer (ML) samples, both the surface ablation and subsurface density dynamics are measured with nanometer depth resolution. Our experimental data challenges the state-of-the-art modeling of matter under extreme conditions and opens new perspectives for laser material processing and high-energy density science.

Primary authors

Lisa Randolph (Universität Siegen) Mohammadreza Banjafar (European XFEL) Thomas R. Preston (European XFEL) Toshinori Yabuuchi (RIKEN SPring-8 Center) Mikako Makita (European XFEL) Nicholas P. Dover (Imperial College London) Christian Rödel (TU Darmstadt) Sebastian Göde (European XFEL) Yuichi Inubushi (RIKEN Spring-8 Center) Gerhard Jakob (Universität Mainz) Johannes Kaa (European XFEL) Akira Kon (QST Kansai) James K. Koga (QST Kansai) Dmitriy Ksenzov (Universität Siegen) Takeshi Matsuoka (Osaka University) Mamiko Nishiushi (QST Kansai) Michael Paulus (TU Dortmund) Frederic Schon (Universität Siegen) Keiichi Sueda (RIKEN Spring-8 Center) Yasuhiko Sentoku (Osaka University) Tadashi Togashi (RIKEN Spring-8 Center) Mehran Vafaee-Khanjani (Unversität Mainz) Michael Bussmann (HZDR) Thomas E. Cowan (HZDR) Mathias Kläui (Universität Mainz) Carsten Fortmann-Grote (European XFEL) Lingen Huang (HZDR) Adrian P. Mancuso (European XFEL) Thomas Kluge (HZDR) Christian Gutt (Universität Siegen) Motoaki Nakatsutsumi (European XFEL)

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