Bibliographie

Journal of Applied Physics, 138, 155903, (2025) [doi: 10.1063/5.0295250]

X-ray thermal diffuse scattering as a texture-robust temperature diagnostic for dynamically compressed solids

P. G. Heighway, D. J. Peake, T. Stevens, J. S. Wark, B. Albertazzi, S. J. Ali, L. Antonelli, M. R. Armstrong, C. Baehtz, O. B. Ball, S. Banerjee, A. B. Belonoshko, C. A. Bolme, V. Bouffetier, R. Briggs, K. Buakor, T. Butcher, S. Di Dio Cafiso, V. Cerantola, J. Chantel, A. Di Cicco, A. L. Coleman, J. Collier, G. Collins, A. J. Comley, F. Coppari, T. E. Cowan, G. Cristoforetti, H. Cynn, A. Descamps, F. Dorchies, M. J. Duff, A. Dwivedi, C. Edwards, J. H. Eggert, D. Errandonea, G. Fiquet, E. Galtier, A. Laso Garcia, H. Ginestet, L. Gizzi, A. Gleason, S. Goede, J. M. Gonzalez, M. G. Gorman, M. Harmand, N. J. Hartley, C. Hernandez-Gomez, A. Higginbotham, H. Höppner, O. S. Humphries, R. J. Husband, T. M. Hutchinson, H. Hwang, D. A. Keen, J. Kim, P. Koester, Z. Konopkova, D. Kraus, A. Krygier, L. Labate, A. E. Lazicki, Y. Lee, H.-P. Liermann, P. Mason, M. Masruri, B. Massani, E. E. McBride, C. McGuire, J. D. McHardy, D. McGonegle, R. S. McWilliams, S. Merkel, G. Morard, B. Nagler, M. Nakatsutsumi, K. Nguyen-Cong, A.-M. Norton, I. I. Oleynik, C. Otzen, N. Ozaki, S. Pandolfi, A. Pelka, K. A. Pereira, J. P. Phillips, C. Prescher, T. Preston, L. Randolph, D. Ranjan, A. Ravasio, J. Rips, D. Santamaria-Perez, D. J. Savage, M. Schoelmerich, J.-P. Schwinkendorf, S. Singh, J. Smith, R. F. Smith, A. Sollier, J. Spear, C. Spindloe, M. Stevenson, C. Strohm, T.-A. Suer, M. Tang, M. Toncian, T. Toncian, S. J. Tracy, A. Trapananti, T. Tschentscher, M. Tyldesley, C. E. Vennari, T. Vinci, S. C. Vogel, T. J. Volz, J. Vorberger, J. T. Willman, L. Wollenweber, U. Zastrau, E. Brambrink, K. Appel, M. I. McMahon

We present a model of x-ray thermal diffuse scattering (TDS) from a cubic polycrystal with an arbitrary crystallographic texture, based on the classic approach of Warren [B. E. Warren, Acta Crystallogr. 6, 803 (1953)]. We compare the predictions of our model with femtosecond x-ray diffraction patterns gathered from ambient and dynamically compressed rolled copper foils obtained at the High Energy Density instrument of the European X-Ray Free-Electron Laser facility and find that the texture-aware TDS model yields more accurate results than does the conventional powder model owed to Warren. Nevertheless, we further show: with sufficient angular detector coverage, the TDS signal is largely unchanged by sample orientation and in all cases strongly resembles the signal from a perfectly random powder; shot-to-shot fluctuations in the TDS signal resulting from grain-sampling statistics are at the percent level, in stark contrast to the fluctuations in the Bragg-peak intensities (which are over an order of magnitude greater); and TDS is largely unchanged even following texture evolution caused by compression-induced plastic deformation. We conclude that TDS is robust against texture variation, making it a flexible temperature diagnostic applicable just as well to off-the-shelf commercial foils as to ideal powders.

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