Toward model-free temperature diagnostics of warm dense matter from multiple scattering angles

Bellenbaum, H. M. (ORCID:0009000665301017); Bachmann, B. (ORCID:0000000179920018); Kraus, D. (ORCID:0000000263504180); Gawne, Th. (ORCID:0000000199983606); Böhme, M. P. (ORCID:0000000302903628); Döppner, T. (ORCID:0000000257037125); Fletcher, L. B. (ORCID:0000000271207194); MacDonald, M. J. (ORCID:0000000262956978); Moldabekov, Zh. A. (ORCID:0000000297259208); Preston, T. R. (ORCID:0000000312282263); Vorberger, J. (ORCID:0000000159269192); Dornheim, T. (ORCID:0000000172936615)

doi:10.1063/5.0248230

DOE OSTI · 2507270

Toward model-free temperature diagnostics of warm dense matter from multiple scattering angles

Bellenbaum, H. M. (ORCID:0009000665301017)·Bachmann, B. (ORCID:0000000179920018)·Kraus, D. (ORCID:0000000263504180)·Gawne, Th. (ORCID:0000000199983606)·Böhme, M. P. (ORCID:0000000302903628)·Döppner, T. (ORCID:0000000257037125)·Fletcher, L. B. (ORCID:0000000271207194)·MacDonald, M. J. (ORCID:0000000262956978)·Moldabekov, Zh. A. (ORCID:0000000297259208)·Preston, T. R. (ORCID:0000000312282263)·Vorberger, J. (ORCID:0000000159269192)·Dornheim, T. (ORCID:0000000172936615)

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Abstract

Warm dense matter plays an important role in astrophysical objects and technological applications, but the rigorous diagnostics of corresponding experiments is notoriously difficult. In this work, we present a model-free analysis of x-ray Thomson scattering (XRTS) measurements on isochorically heated graphite obtained at the Linac Coherent Light Source at multiple scattering angles. We demonstrate that the recent imaginary-time thermometry technique works for scattering data that have been measured in both forward and backward scattering geometry. This opens up the way toward a rigorous quantification of nonequilibrium effects in future experiments, where XRTS measurements are being obtained from multiple scattering angles from the same sample.

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Equations of state Forward scattering High energy density physics Integral transforms Lasers Thomson scattering X-rays

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Bellenbaum, H. M. (ORCID:0009000665301017), Bachmann, B. (ORCID:0000000179920018), Kraus, D. (ORCID:0000000263504180), Gawne, Th. (ORCID:0000000199983606), Böhme, M. P. (ORCID:0000000302903628), Döppner, T. (ORCID:0000000257037125), Fletcher, L. B. (ORCID:0000000271207194), MacDonald, M. J. (ORCID:0000000262956978), Moldabekov, Zh. A. (ORCID:0000000297259208), Preston, T. R. (ORCID:0000000312282263), Vorberger, J. (ORCID:0000000159269192), Dornheim, T. (ORCID:0000000172936615). 2025-01-28. Toward model-free temperature diagnostics of warm dense matter from multiple scattering angles. https://doi.org/10.1063/5.0248230

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