91̽�� Centre for High Energy Density Science (OxCHEDS): publications

A Bayesian perspective on single-shot laser characterization

(2025)

Authors:

J Esslinger, N Weisse, C Eberle, J Schroeder, S Howard, P Norreys, S Karsch, A Döpp

Collisionless conduction in a high-beta plasma: a collision operator for whistler turbulence

Journal of Plasma Physics Cambridge University Press (CUP) 91:1 (2025) e20

Authors:

Evan L Yerger, Matthew W Kunz, Archie FA Bott, Anatoly Spitkovsky

Evolution of autoresonant plasma wave excitation in two-dimensional particle-in-cell simulations

Journal of Plasma Physics Cambridge University Press (CUP) 91:1 (2025) e31

Authors:

M Luo, C Riconda, A Grassi, N Wang, JS Wurtele, T Fülöp, I Pusztai

Shock-driven amorphization and melting in Fe2⁢O3

Physical Review B American Physical Society 111:2 (2025) 024209

Authors:

Celine Crépisson, Alexis Amouretti, Marion Harmand, Chrystele Sanloup, Patrick Heighway, Sam Azadi, David McGonegle, Thomas Campbell, Juan Pintor, David A Chin, Ethan Smith, Linda Hansen, Alessandro Forte, Thomas Gawne, Hae Ja Lee, Bob Nagler, Yuanfeng Shi, Guillaume Fiquet, Francois Guyot, Makita Mikako, Alessandra Bennuzi-Mounaix, Tommaso Vinci, Kohei Miyanishi, Norimasa Ozaki, Tatiana Pikuz, Hirotaka Nakamura, Keiichi Sueda, Toshinori Yabuushi, Makina Yabashi, Justin S Wark, Danae N Polsin, Sam M Vinko

Abstract:

We present measurements on Fe₂O₃ amorphization and melt under laser-driven shock compression up to 209(10) GPa via time-resolved in situ x-ray diffraction. At 122(3) GPa, a diffuse signal is observed indicating the presence of a noncrystalline phase. Structure factors have been extracted up to 182(6) GPa showing the presence of two well-defined peaks. A rapid change in the intensity ratio of the two peaks is identified between 145(12) and 151(12) GPa, indicative of a phase change. The noncrystalline diffuse scattering is consistent with shock amorphization of Fe₂O₃ between 122(3) and 145(12) GPa, followed by an amorphous-to-liquid transition above 151(12) GPa. Upon release, a noncrystalline phase is observed alongside crystalline α-Fe₂O₃. The extracted structure factor and pair distribution function of this release phase resemble those reported for Fe₂O₃ melt at ambient pressure.

Shock-driven amorphization and melting in ${Fe}_{2} O_{3}$

Physical Review B (condensed matter and materials physics) American Physical Society 111:2 (2025) 24209

Authors:

Céline Crépisson, Alexis Amouretti, Marion Harmand, Chrystèle Sanloup, Patrick Heighway, Sam Azadi, David McGonegle, Thomas Campbell, Juan Pintor, David Alexander Chin, Ethan Smith, Linda Hansen, Alessandro Forte, Thomas Gawne, Hae Ja Lee, Bob Nagler, YuanFeng Shi, Guillaume Fiquet, François Guyot, Mikako Makita, Alessandra Benuzzi-Mounaix, Tommaso Vinci, Kohei Miyanishi, Norimasa Ozaki, Tatiana Pikuz, Hirotaka Nakamura, Keiichi Sueda, Toshinori Yabuuchi, Makina Yabashi, Justin S Wark, Danae N Polsin, Sam M Vinko

Abstract:

We present measurements on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:msub><a:mi>Fe</a:mi><a:mn>2</a:mn></a:msub><a:msub><a:mi mathvariant="normal">O</a:mi><a:mn>3</a:mn></a:msub></a:mrow></a:math> amorphization and melt under laser-driven shock compression up to 209(10) GPa via time-resolved x-ray diffraction. At 122(3) GPa, a diffuse signal is observed indicating the presence of a noncrystalline phase. Structure factors have been extracted up to 182(6) GPa showing the presence of two well-defined peaks. A rapid change in the intensity ratio of the two peaks is identified between 145(12) and 151(12) GPa, indicative of a phase change. The noncrystalline diffuse scattering is consistent with shock amorphization of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:msub><c:mi>Fe</c:mi><c:mn>2</c:mn></c:msub><c:msub><c:mi mathvariant="normal">O</c:mi><c:mn>3</c:mn></c:msub></c:mrow></c:math> between 122(3) and 145(12) GPa, followed by an amorphous-to-liquid transition above 151(12) GPa. Upon release, a noncrystalline phase is observed alongside crystalline <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"><e:mrow><e:mi>α</e:mi><e:mtext>−</e:mtext><e:msub><e:mi>Fe</e:mi><e:mn>2</e:mn></e:msub><e:msub><e:mi mathvariant="normal">O</e:mi><e:mn>3</e:mn></e:msub></e:mrow></e:math>. The extracted structure factor and pair distribution function of this release phase resemble those reported for <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"><g:mrow><g:msub><g:mi>Fe</g:mi><g:mn>2</g:mn></g:msub><g:msub><g:mi mathvariant="normal">O</g:mi><g:mn>3</g:mn></g:msub></g:mrow></g:math> melt at ambient pressure. Published by the American Physical Society 2025

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