| Autor: |
Arthur Pak, S. H. Glenzer, David Turnbull, Carsten Fortmann, O. L. Landen, Tilo Döppner, Bob Nagler, T Ma, Jan Vorberger, Gianluca Gregori, S. Le Pape, J. B. Hastings, Thomas G. White, Ulf Zastrau, Roger Falcone, Luke Fletcher, D. A. Chapman, Paul Neumayer, K. Wünsch, Eric Galtier, H. J. Lee, Dirk O. Gericke |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Popis: |
Using simultaneous spectrally, angularly, and temporally resolved x-ray scattering, we measure the pronounced ion-ion correlation peak in a strongly coupled plasma. Laser-driven shock-compressed aluminum at ∼3× solid density is probed with high-energy photons at 17.9keV created by molybdenum He-α emission in a laser-driven plasma source. The measured elastic scattering feature shows a well-pronounced correlation peak at a wave vector of k=4Å-1. The magnitude of this correlation peak cannot be described by standard plasma theories employing a linear screened Coulomb potential. Advanced models, including a strong short-range repulsion due to the inner structure of the aluminum ions are however in good agreement with the scattering data. These studies have demonstrated a new highly accurate diagnostic technique to directly measure the state of compression and the ion-ion correlations. We have since applied this new method in single-shot wave-number resolved S(k) measurements to characterize the physical properties of dense plasmas. © 2014 AIP Publishing LLC. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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