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X-ray source characterization and sample heating on x-ray diffraction experiments at the National Ignition Facility

Krygier, A. (ORCID:0000000161781195)·Wehrenberg, C. E. (ORCID:000000016724522X)·Bernier, J. V. (ORCID:0000000154188094)·Clarke, S. (ORCID:0000000268749929)·Coleman, A. L. (ORCID:0000000256924400)·Coppari, F. (ORCID:0000000315923898)·Duffy, T. S. (ORCID:0000000253571259)·Gorman, M. G. (ORCID:0000000195676166)·Hohenberger, M. (ORCID:0000000258879711)·Kalantar, D. (ORCID:0000000277712546)·Kemp, G. E. (ORCID:0000000238253666)·Khan, S. F. (ORCID:0000000308989178)·Krauland, C. (ORCID:000000021887043X)·Kraus, R. G. (ORCID:0000000330881892)·Lazicki, A. (ORCID:0000000298216074)·MacDonald, M. J. (ORCID:0000000262956978)·MacPhee, A. G. (ORCID:0000000341604479)·Marley, E.·Marshall, M. C. (ORCID:0000000187973005)·May, M. (ORCID:0000000179677337)·McNaney, J. M. (ORCID:0000000335269379)·Millot, M. (ORCID:0000000344143532)·Ping, Y. (ORCID:0000000248799072)·Poole, P. L. (ORCID:0000000268746664)·Rygg, J. R. (ORCID:0000000206057847)·Schneider, M. (ORCID:0000000197068308)·Sio, H. (ORCID:000000017274236X)·Stoupin, S. (ORCID:0000000226225270)·Swift, D.·Yeamans, C. (ORCID:000000026408638X)·Zobrist, T. (ORCID:0000000234802170)·Smith, R. F. (ORCID:0000000256755731)·Eggert, J. H. (ORCID:0000000157307108)
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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 Heα 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.

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70 PLASMA PHYSICS AND FUSION TECHNOLOGYemission spectroscopylaser plasma interactionsthermodynamic propertiesthermodynamic states and processesx-ray diffractionx-ray imagingx-ray spectroscopy

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Krygier, A. (ORCID:0000000161781195), Wehrenberg, C. E. (ORCID:000000016724522X), Bernier, J. V. (ORCID:0000000154188094), Clarke, S. (ORCID:0000000268749929), Coleman, A. L. (ORCID:0000000256924400), Coppari, F. (ORCID:0000000315923898), Duffy, T. S. (ORCID:0000000253571259), Gorman, M. G. (ORCID:0000000195676166), Hohenberger, M. (ORCID:0000000258879711), Kalantar, D. (ORCID:0000000277712546), Kemp, G. E. (ORCID:0000000238253666), Khan, S. F. (ORCID:0000000308989178), Krauland, C. (ORCID:000000021887043X), Kraus, R. G. (ORCID:0000000330881892), Lazicki, A. (ORCID:0000000298216074), MacDonald, M. J. (ORCID:0000000262956978), MacPhee, A. G. (ORCID:0000000341604479), Marley, E., Marshall, M. C. (ORCID:0000000187973005), May, M. (ORCID:0000000179677337), McNaney, J. M. (ORCID:0000000335269379), Millot, M. (ORCID:0000000344143532), Ping, Y. (ORCID:0000000248799072), Poole, P. L. (ORCID:0000000268746664), Rygg, J. R. (ORCID:0000000206057847), Schneider, M. (ORCID:0000000197068308), Sio, H. (ORCID:000000017274236X), Stoupin, S. (ORCID:0000000226225270), Swift, D., Yeamans, C. (ORCID:000000026408638X), Zobrist, T. (ORCID:0000000234802170), Smith, R. F. (ORCID:0000000256755731), Eggert, J. H. (ORCID:0000000157307108). 2022-10-17. X-ray source characterization and sample heating on x-ray diffraction experiments at the National Ignition Facility. https://doi.org/10.1063/5.0100361

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