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Observations of strong ion-ion correlations in dense plasmas
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(2014) Observations of strong ion-ion correlations in dense plasmas. Physics of Plasmas, Volume 21 (Number 5). 056302. doi:10.1063/1.4872161 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.4872161
Abstract
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 similar to 3x solid density is probed with high-energy photons at 17.9 keV created by molybdenum He-alpha emission in a laser-driven plasma source. The measured elastic scattering feature shows a well-pronounced correlation peak at a wave vector of k = 4 angstrom(-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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physics of Plasmas | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 1070-664X | ||||
| Official Date: | May 2014 | ||||
| Dates: |
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| Volume: | Volume 21 | ||||
| Number: | Number 5 | ||||
| Article Number: | 056302 | ||||
| DOI: | 10.1063/1.4872161 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | United States. Department of Energy | ||||
| Grant number: | DE-AC52-07NA27344 |
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