Equilibration dynamics and conductivity of warm dense hydrogen
We investigate subpicosecond dynamics of warm dense hydrogen at the XUV free-electron laser facility (FLASH) at DESY (Hamburg). Ultrafast impulsive electron heating is initiated by a â‰300-fs short x-ray burst of 92-eV photon energy. A second pulse probes the sample via x-ray scattering at jitter-fr...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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American Physical Society
2014
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| _version_ | 1826270839244324864 |
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| author | Zastrau, U Sperling, P Becker, A Bornath, T Bredow, R Doeppner, T Dziarzhytski, S Fennel, T Fletcher, L Forster, E Fortmann, C Glenzer, S Goede, S Gregori, G Harmand, M Hilbert, V Holst, B Laarmann, T Lee, H Ma, T Mithen, J Mitzner, R Murphy, C Nakatsutsumi, M Neumayer, P |
| author_facet | Zastrau, U Sperling, P Becker, A Bornath, T Bredow, R Doeppner, T Dziarzhytski, S Fennel, T Fletcher, L Forster, E Fortmann, C Glenzer, S Goede, S Gregori, G Harmand, M Hilbert, V Holst, B Laarmann, T Lee, H Ma, T Mithen, J Mitzner, R Murphy, C Nakatsutsumi, M Neumayer, P |
| author_sort | Zastrau, U |
| collection | OXFORD |
| description | We investigate subpicosecond dynamics of warm dense hydrogen at the XUV free-electron laser facility (FLASH) at DESY (Hamburg). Ultrafast impulsive electron heating is initiated by a â‰300-fs short x-ray burst of 92-eV photon energy. A second pulse probes the sample via x-ray scattering at jitter-free variable time delay. We show that the initial molecular structure dissociates within (0.9±0.2) ps, allowing us to infer the energy transfer rate between electrons and ions. We evaluate Saha and Thomas-Fermi ionization models in radiation hydrodynamics simulations, predicting plasma parameters that are subsequently used to calculate the static structure factor. A conductivity model for partially ionized plasma is validated by two-temperature density-functional theory coupled to molecular dynamic simulations and agrees with the experimental data. Our results provide important insights and the needed experimental data on transport properties of dense plasmas. © 2014 American Physical Society. |
| first_indexed | 2024-03-06T21:47:08Z |
| format | Journal article |
| id | oxford-uuid:49fc05eb-e760-4c04-b87e-58e9569d2721 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:47:08Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:49fc05eb-e760-4c04-b87e-58e9569d27212022-03-26T15:34:59ZEquilibration dynamics and conductivity of warm dense hydrogenJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:49fc05eb-e760-4c04-b87e-58e9569d2721EnglishSymplectic Elements at OxfordAmerican Physical Society2014Zastrau, USperling, PBecker, ABornath, TBredow, RDoeppner, TDziarzhytski, SFennel, TFletcher, LForster, EFortmann, CGlenzer, SGoede, SGregori, GHarmand, MHilbert, VHolst, BLaarmann, TLee, HMa, TMithen, JMitzner, RMurphy, CNakatsutsumi, MNeumayer, PWe investigate subpicosecond dynamics of warm dense hydrogen at the XUV free-electron laser facility (FLASH) at DESY (Hamburg). Ultrafast impulsive electron heating is initiated by a â‰300-fs short x-ray burst of 92-eV photon energy. A second pulse probes the sample via x-ray scattering at jitter-free variable time delay. We show that the initial molecular structure dissociates within (0.9±0.2) ps, allowing us to infer the energy transfer rate between electrons and ions. We evaluate Saha and Thomas-Fermi ionization models in radiation hydrodynamics simulations, predicting plasma parameters that are subsequently used to calculate the static structure factor. A conductivity model for partially ionized plasma is validated by two-temperature density-functional theory coupled to molecular dynamic simulations and agrees with the experimental data. Our results provide important insights and the needed experimental data on transport properties of dense plasmas. © 2014 American Physical Society. |
| spellingShingle | Zastrau, U Sperling, P Becker, A Bornath, T Bredow, R Doeppner, T Dziarzhytski, S Fennel, T Fletcher, L Forster, E Fortmann, C Glenzer, S Goede, S Gregori, G Harmand, M Hilbert, V Holst, B Laarmann, T Lee, H Ma, T Mithen, J Mitzner, R Murphy, C Nakatsutsumi, M Neumayer, P Equilibration dynamics and conductivity of warm dense hydrogen |
| title | Equilibration dynamics and conductivity of warm dense hydrogen |
| title_full | Equilibration dynamics and conductivity of warm dense hydrogen |
| title_fullStr | Equilibration dynamics and conductivity of warm dense hydrogen |
| title_full_unstemmed | Equilibration dynamics and conductivity of warm dense hydrogen |
| title_short | Equilibration dynamics and conductivity of warm dense hydrogen |
| title_sort | equilibration dynamics and conductivity of warm dense hydrogen |
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