Femtosecond structural probing of warm dense matter with betatron x-ray source

Fabien Dorchies; Adrïan Grolleau; Sylvain Briand; Julien Gautier; Patrick Renaudin; Vanina Recoules; Kim Ta Phuoc; Ludovic Lecherbourg

doi:10.1117/12.2665807

8 June 2023 Femtosecond structural probing of warm dense matter with betatron x-ray source

Fabien Dorchies, Adrïan Grolleau, Sylvain Briand, Julien Gautier, Patrick Renaudin, Vanina Recoules, Kim Ta Phuoc, Ludovic Lecherbourg

Author Affiliations +

Proceedings Volume 12582, Compact Radiation Sources from EUV to Gamma-rays: Development and Applications; 125820A (2023) https://doi.org/10.1117/12.2665807
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

Exploring and understanding ultrafast processes at the atomic level is a scientific challenge. Femtosecond X-ray Absorption Near-Edge Spectroscopy (XANES) arises as an essential experimental probing method, as it can simultaneously reveal both electronic and atomic structures, and thus potentially unravel their non-equilibrium dynamic interplay which is at the origin of most of the ultrafast mechanisms. The key point of this investigation is the achievement of a femtosecond X-ray source suitable for routine experiments. This paper will show the progressive development and improvement of such laser-plasma-based X-ray sources, starting from the picosecond down to the femtosecond scale. Time-resolved XANES measurements have been achieved and interpreted using ab initio quantum molecular dynamics simulations. This diagnostic was used to shed new light on the non-equilibrium physics involved in various materials. This paper will focus on results devoted to the non-equilibrium dynamics of a copper foil brought from solid to warm dense matter regime, by the use of a femtosecond laser pulse. Particular emphasis will be given to the recent study of the ultrafast electronic transport, which was revealed by the femtosecond time resolution.

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Citation Download Citation

Fabien Dorchies, Adrïan Grolleau, Sylvain Briand, Julien Gautier, Patrick Renaudin, Vanina Recoules, Kim Ta Phuoc, and Ludovic Lecherbourg "Femtosecond structural probing of warm dense matter with betatron x-ray source", Proc. SPIE 12582, Compact Radiation Sources from EUV to Gamma-rays: Development and Applications, 125820A (8 June 2023); https://doi.org/10.1117/12.2665807

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