X-ray source characterization and sample heating on x-ray diffraction experiments at the National Ignition Facility
| Autor: | A. Krygier, C. E. Wehrenberg, J. V. Bernier, S. Clarke, A. L. Coleman, F. Coppari, T. S. Duffy, M. G. Gorman, M. Hohenberger, D. Kalantar, G. E. Kemp, S. F. Khan, C. Krauland, R. G. Kraus, A. Lazicki, M. J. MacDonald, A. G. MacPhee, E. Marley, M. C. Marshall, M. May, J. M. McNaney, M. Millot, Y. Ping, P. L. Poole, J. R. Rygg, M. Schneider, H. Sio, S. Stoupin, D. Swift, C. Yeamans, T. Zobrist, R. F. Smith, J. H. Eggert |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 29:103302 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/5.0100361 |
| Popis: | X-ray diffraction is a powerful measurement technique for determining material properties, and it is now possible to perform these experiments at pressures exceeding 1 TPa [Rygg et al., Rev. Sci. Instrum. 91, 043902 (2020)] at the National Ignition Facility (NIF). The x-ray source for these experiments is the quasi-monochromatic He α emission from metal foils heated to multi-keV temperatures. A critical aspect for understanding the sample's thermodynamic state is the amount of heating caused by absorption of the probe x-rays. In this work, we characterize the performance of the Ge foil x-ray source over more than 60 NIF x-ray diffraction experiments. We use this information to constrain the level of diffraction sample heating from the x-ray source and discuss the impact on the thermodynamic state. |
| Databáze: | OpenAIRE |
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