Résumé
We have observed the lattice expansion before the onset of compression in an optical-laser-driven target, using diffraction of femtosecond X-ray beams generated by the SPring-8 Angstrom Compact Free-electron Laser. The change in diffraction angle provides a direct measure of the lattice spacing, allowing the density to be calculated with a precision of ±1%. From the known equation of state relations, this allows an estimation of the temperature responsible for the expansion as <1000 K. The subsequent ablation-driven compression was observed with a clear rise in density at later times. This demonstrates the feasibility of studying the dynamics of preheating and shock formation with unprecedented detail.
| langue originale | Anglais |
|---|---|
| Numéro d'article | 071905 |
| journal | Applied Physics Letters |
| Volume | 110 |
| Numéro de publication | 7 |
| Les DOIs | |
| état | Publié - 13 févr. 2017 |
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