1. X-ray source characterization and sample heating on x-ray diffraction experiments at the National Ignition Facility.
- Author
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Krygier, A., Wehrenberg, C. E., Bernier, J. V., Clarke, S., Coleman, A. L., Coppari, F., Duffy, T. S., Gorman, M. G., Hohenberger, M., Kalantar, D., Kemp, G. E., Khan, S. F., Krauland, C., Kraus, R. G., Lazicki, A., MacDonald, M. J., MacPhee, A. G., Marley, E., Marshall, M. C., and May, M.
- Subjects
X-ray diffraction ,HEAT radiation & absorption ,X-rays ,METAL foils ,X-ray absorption - Abstract
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. [ABSTRACT FROM AUTHOR]- Published
- 2022
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