Experimental Evidence of Harnessed Expansion of a High- Z Plasma Using the Hollow Wall Design for Indirect Drive Inertial Confinement Fusion
| Autor: | Sylvie Depierreux, D. Antigny, T. Filkins, O. Dubos, C. Sorce, R. E. Bahr, M. Ferri, N. Botrel, J. Fariaut, L. DeLaval, V. Tassin, R. Bourdenet, B. Villette, G. DeDemo, M. Vandenboomgaerde, S. LeTacon |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Equator General Physics and Astronomy Plasma 01 natural sciences Symmetry (physics) law.invention Ignition system Optics law Hohlraum 0103 physical sciences Irradiation 010306 general physics Absorption (electromagnetic radiation) business Inertial confinement fusion |
| Zdroj: | Physical Review Letters. 125 |
| ISSN: | 1079-7114 0031-9007 1070-664X |
| DOI: | 10.1103/physrevlett.125.255002 |
| Popis: | The effectiveness of a dome-shaped wall covered by a thin gold foil (hollow wall) [M. Vandenboomgaerde et al., Phys. Plasmas 25, 012713 (2018)PHPAEN1070-664X10.1063/1.5008669] in holding back the high-Z plasma expansion in a gas-filled hohlraum is demonstrated for the first time in experiments reproducing the irradiation conditions of indirect drive at the ignition scale. The setup exploits a 1D geometry enabling record of the complete history of the gold expansion for 8 ns by imaging its emission in multiple x-ray energy ranges featuring either the absorption zones or the thermal emission regions. The measured expansion dynamics is well reproduced by numerical simulations. This novel wall design could now be tailored for the megajoule scale to enable the propagation of the inner beams up to the equator in low gas-filled hohlraum thus allowing the fine-tuning of the irradiation symmetry on the timescale required for ignition. |
| Databáze: | OpenAIRE |
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