Evolution of elastic x-ray scattering in laser-shocked warm dense lithium.
We have studied the dynamics of warm dense Li with near-elastic x-ray scattering. Li foils were heated and compressed using shock waves driven by 4-ns-long laser pulses. Separate 1-ns-long laser pulses were used to generate a bright source of 2.96 keV Cl Ly- alpha photons for x-ray scattering, and t...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2009
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| _version_ | 1826263631429369856 |
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| author | Kugland, N Gregori, G Bandyopadhyay, S Brenner, C Brown, C Constantin, C Glenzer, S Khattak, F Kritcher, A Niemann, C Otten, A Pasley, J Pelka, A Roth, M Spindloe, C Riley, D |
| author_facet | Kugland, N Gregori, G Bandyopadhyay, S Brenner, C Brown, C Constantin, C Glenzer, S Khattak, F Kritcher, A Niemann, C Otten, A Pasley, J Pelka, A Roth, M Spindloe, C Riley, D |
| author_sort | Kugland, N |
| collection | OXFORD |
| description | We have studied the dynamics of warm dense Li with near-elastic x-ray scattering. Li foils were heated and compressed using shock waves driven by 4-ns-long laser pulses. Separate 1-ns-long laser pulses were used to generate a bright source of 2.96 keV Cl Ly- alpha photons for x-ray scattering, and the spectrum of scattered photons was recorded at a scattering angle of 120 degrees using a highly oriented pyrolytic graphite crystal operated in the von Hamos geometry. A variable delay between the heater and backlighter laser beams measured the scattering time evolution. Comparison with radiation-hydrodynamics simulations shows that the plasma is highly coupled during the first several nanoseconds, then relaxes to a moderate coupling state at later times. Near-elastic scattering amplitudes have been successfully simulated using the screened one-component plasma model. Our main finding is that the near-elastic scattering amplitudes are quite sensitive to the mean ionization state Z[over ] and by extension to the choice of ionization model in the radiation-hydrodynamics simulations used to predict plasma properties within the shocked Li. |
| first_indexed | 2024-03-06T19:54:51Z |
| format | Journal article |
| id | oxford-uuid:2536d8b3-2196-4d6c-8b0f-51f4fde4157a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:54:51Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:2536d8b3-2196-4d6c-8b0f-51f4fde4157a2022-03-26T11:54:27ZEvolution of elastic x-ray scattering in laser-shocked warm dense lithium.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2536d8b3-2196-4d6c-8b0f-51f4fde4157aEnglishSymplectic Elements at Oxford2009Kugland, NGregori, GBandyopadhyay, SBrenner, CBrown, CConstantin, CGlenzer, SKhattak, FKritcher, ANiemann, COtten, APasley, JPelka, ARoth, MSpindloe, CRiley, DWe have studied the dynamics of warm dense Li with near-elastic x-ray scattering. Li foils were heated and compressed using shock waves driven by 4-ns-long laser pulses. Separate 1-ns-long laser pulses were used to generate a bright source of 2.96 keV Cl Ly- alpha photons for x-ray scattering, and the spectrum of scattered photons was recorded at a scattering angle of 120 degrees using a highly oriented pyrolytic graphite crystal operated in the von Hamos geometry. A variable delay between the heater and backlighter laser beams measured the scattering time evolution. Comparison with radiation-hydrodynamics simulations shows that the plasma is highly coupled during the first several nanoseconds, then relaxes to a moderate coupling state at later times. Near-elastic scattering amplitudes have been successfully simulated using the screened one-component plasma model. Our main finding is that the near-elastic scattering amplitudes are quite sensitive to the mean ionization state Z[over ] and by extension to the choice of ionization model in the radiation-hydrodynamics simulations used to predict plasma properties within the shocked Li. |
| spellingShingle | Kugland, N Gregori, G Bandyopadhyay, S Brenner, C Brown, C Constantin, C Glenzer, S Khattak, F Kritcher, A Niemann, C Otten, A Pasley, J Pelka, A Roth, M Spindloe, C Riley, D Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title | Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title_full | Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title_fullStr | Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title_full_unstemmed | Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title_short | Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. |
| title_sort | evolution of elastic x ray scattering in laser shocked warm dense lithium |
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