| Autor: |
C Peltz, J A Powell, P Rupp, A Summers, T Gorkhover, M Gallei, I Halfpap, E Antonsson, B Langer, C Trallero-Herrero, C Graf, D Ray, Q Liu, T Osipov, M Bucher, K Ferguson, S Möller, S Zherebtsov, D Rolles, E Rühl, G Coslovich, R N Coffee, C Bostedt, A Rudenko, M F Kling, T Fennel |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 24, Iss 4, p 043024 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/ac5e86 |
| Popis: |
The free expansion of a planar plasma surface is a fundamental non-equilibrium process relevant for various fields but as-yet experimentally still difficult to capture. The significance of the associated spatiotemporal plasma motion ranges from astrophysics and controlled fusion to laser machining, surface high-harmonic generation, plasma mirrors, and laser-driven particle acceleration. Here, we show that x-ray coherent diffractive imaging can surpass existing approaches and enables the quantitative real-time analysis of the sudden free expansion of laser-heated nanoplasmas. For laser-ionized SiO _2 nanospheres, we resolve the formation of the emerging nearly self-similar plasma profile evolution and expose the so far inaccessible shell-wise expansion dynamics including the associated startup delay and rarefaction front velocity. Our results establish time-resolved diffractive imaging as an accurate quantitative diagnostic platform for tracing and characterizing plasma expansion and indicate the possibility to resolve various laser-driven processes including shock formation and wave-breaking phenomena with unprecedented resolution. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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