Nonequilibrium warm dense matter investigated with laser–plasma-based XANES down to the femtosecond

Author:

Dorchies F.1ORCID,Ta Phuoc K.2,Lecherbourg L.34ORCID

Affiliation:

1. Université, Bordeaux, CNRS, CEA, CELIA, UMR 5107 1 , F-33400 Talence, France

2. LOA, ENSTA, CNRS, Ecole Polytechnique, UMR 7639 2 , F-91761 Palaiseau, France

3. CEA, DAM 3 , DIF, F-91297 Arpajon, France

4. Université Paris-Saclay, CEA, LMCE 4 , 91680 Bruyères-le-Châtel, France

Abstract

The use of laser–plasma-based x-ray sources is discussed, with a view to carrying out time-resolved x-ray absorption spectroscopy measurements, down to the femtosecond timescale. A review of recent experiments performed by our team is presented. They concern the study of the nonequilibrium transition of metals from solid to the warm dense regime, which imposes specific constraints (the sample being destroyed after each shot). Particular attention is paid to the description of experimental devices and methodologies. Two main types of x-ray sources are compared, respectively, based on the emission of a hot plasma, and on the betatron radiation from relativistic electrons accelerated by laser.

Funder

Agence Nationale de la Recherche

Publisher

AIP Publishing

Subject

Spectroscopy,Condensed Matter Physics,Instrumentation,Radiation

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