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4 results on '"James D. McHardy"'

1. A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell

Author

Rachel J. Husband, Cornelius Strohm, Karen Appel, Orianna B. Ball, Richard Briggs, Johannes Buchen, Valerio Cerantola, Stella Chariton, Amy L. Coleman, Hyunchae Cynn, Dana Dattelbaum, Anand Dwivedi, Jon H. Eggert, Lars Ehm, William J. Evans, Konstantin Glazyrin, Alexander F. Goncharov, Heinz Graafsma, Alex Howard, Larissa Huston, Trevor M. Hutchinson, Huijeong Hwang, Sony Jacob, Johannes Kaa, Jaeyong Kim, Minseob Kim, Egor Koemets, Zuzana Konôpková, Falko Langenhorst, Torsten Laurus, Xinyang Li, Jona Mainberger, Hauke Marquardt, Emma E. McBride, Christopher McGuire, James D. McHardy, Malcolm I. McMahon, R. Stewart McWilliams, Alba S. J. Méndez, Anshuman Mondal, Guillaume Morard, Earl F. O'Bannon, Christoph Otzen, Charles M. Pépin, Vitali B. Prakapenka, Clemens Prescher, Thomas R. Preston, Ronald Redmer, Michael Roeper, Carmen Sanchez-Valle, Dean Smith, Raymond F. Smith, Daniel Sneed, Sergio Speziale, Tobias Spitzbart, Stephan Stern, Blake T. Sturtevant, Jolanta Sztuk-Dambietz, Peter Talkovski, Nenad Velisavljevic, Cara Vennari, Zhongyan Wu, Choong-Shik Yoo, Ulf Zastrau, Zsolt Jenei, and Hanns-Peter Liermann

Subjects
extreme conditions science, x-ray free-electron lasers, diamond anvil cells, dynamic compression, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, Crystallography, QD901-999
Abstract

An experimental platform for dynamic diamond anvil cell (dDAC) research has been developed at the High Energy Density (HED) Instrument at the European X-ray Free Electron Laser (European XFEL). Advantage was taken of the high repetition rate of the European XFEL (up to 4.5 MHz) to collect pulse-resolved MHz X-ray diffraction data from samples as they are dynamically compressed at intermediate strain rates (≤103 s−1), where up to 352 diffraction images can be collected from a single pulse train. The set-up employs piezo-driven dDACs capable of compressing samples in ≥340 µs, compatible with the maximum length of the pulse train (550 µs). Results from rapid compression experiments on a wide range of sample systems with different X-ray scattering powers are presented. A maximum compression rate of 87 TPa s−1 was observed during the fast compression of Au, while a strain rate of ∼1100 s−1 was achieved during the rapid compression of N2 at 23 TPa s−1.

Published
2023
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2. On the creation of thermal equations of state for use in Dioptas

Author

James D. McHardy, Christian V. Storm, Matthew J. Duff, Simon G. Macleod, and Malcolm I. McMahon

Subjects
Dioptas, Equation of state, Condensed Matter Physics, high pressure standards, jcpds
Abstract

Dioptas is a widely used software package for integrating and analysing 2-dimensional diffraction images. To help interpret the integrated diffraction profiles it produces, Dioptas users can input files that parameterise a material's thermal equation of state (EoS), enabling the positions of the Bragg peaks from that material to be calculated as a function of pressure and temperature. However, care is needed to ensure that these input files correctly describe the thermal EoS of interest. Here we describe the thermal EoS model used by Dioptas and show how existing thermal EoS should be reparameterised so as to be used correctly in Dioptas. Input EoS files suitable for use with Dioptas are provided for the following commonly-used pressure calibrants and pressure transmitting media: Al, Au, Cu, Mo, Nb, Pt, Ta, hcp-Fe, MgO, NaCl-B1, NaCl-B2, KCl-B2, and Ne.

Published
2023
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3. X-ray Free Electron Laser-Induced Synthesis of ϵ-Iron Nitride at High Pressures

Author

Dana Dattlebaum, Alexander F. Goncharov, Thomas Vogt, R. Stewart McWilliams, R. J. Husband, Guillaume Morard, Emma McBride, A. L. Coleman, Vitali B. Prakapenka, Jaeyong Kim, Jona Mainberger, Elena Bykova, Jeffrey S. Pigott, Julien Chantel, Zuzana Konôpková, Leora E. Dresselhaus-Marais, Yongjae Lee, E. F. O'Bannon, Georg Spiekermann, A. Pelka, Karen Appel, Jon Eggert, Nenad Velisavljevic, Christoph Otzen, Richard Briggs, Clemens Prescher, Konstantin Glazyrin, Guillaume Fiquet, Mungo Frost, M. A. Baron, Edward J. Pace, James D. McHardy, Ulf Zastrau, Hyunchae Cynn, Max Wilke, C. Strohm, Lars Ehm, Taehyun Kim, Hauke Marquardt, Hanns-Peter Liermann, Valerio Cerantola, Charles Pépin, Sébastien Merkel, Blake T. Sturtevant, Malcolm McMahon, Orianna B. Ball, Ronald Redmer, M. Makita, Choong-Shik Yoo, Zsolt Jenei, Maxim Bykov, Carsten Baehtz, Sergio Speziale, Huijeong Hwang, William J. Evans, Hwang, H, Kim, T, Cynn, H, Vogt, T, Husband, R, Appel, K, Baehtz, C, Ball, O, Baron, M, Briggs, R, Bykov, M, Bykova, E, Cerantola, V, Chantel, J, Coleman, A, Dattlebaum, D, Dresselhaus-Marais, L, Eggert, J, Ehm, L, Evans, W, Fiquet, G, Frost, M, Glazyrin, K, Goncharov, A, Jenei, Z, Kim, J, Konôpková, Z, Mainberger, J, Makita, M, Marquardt, H, Mcbride, E, Mchardy, J, Merkel, S, Morard, G, O'Bannon, E, Otzen, C, Pace, E, Pelka, A, Pépin, C, Pigott, J, Prakapenka, V, Prescher, C, Redmer, R, Speziale, S, Spiekermann, G, Strohm, C, Sturtevant, B, Velisavljevic, N, Wilke, M, Yoo, C, Zastrau, U, Liermann, H, Mcmahon, M, Mcwilliams, R, Lee, Y, Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Yonsei University, Lawrence Livermore National Laboratory (LLNL), University of South Carolina [Columbia], Deutsches Elektronen-Synchrotron [Hamburg] (DESY), University of Edinburgh, Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Carnegie Institution for Science, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Los Alamos National Laboratory (LANL), Stony Brook University [SUNY] (SBU), State University of New York (SUNY), Hanyang University, Department of Earth Sciences [Oxford], University of Oxford, Institut des Sciences de la Terre (ISTerre), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Saclay, Case Western Reserve University [Cleveland], University of Chicago, Institut für Physik [Rostock], Universität Rostock, GeoForschungsZentrum - Helmholtz-Zentrum Potsdam (GFZ), Institut für Geowissenschaften [Potsdam], University of Potsdam = Universität Potsdam, Washington State University (WSU), Carnegie Institution for Science [Washington], Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), University of Oxford [Oxford], Universität Potsdam, Université de Lille, CNRS, INRA, ENSCL, Lawrence Livermore National Laboratory [LLNL], Deutsches Elektronen-Synchrotron [Hamburg] [DESY], Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC], Unité Matériaux et Transformations - UMR 8207 [UMET], Los Alamos National Laboratory [LANL], Stony Brook University [SUNY] [SBU], Institut des Sciences de la Terre [ISTerre], DAM Île-de-France [DAM/DIF], GeoForschungsZentrum - Helmholtz-Zentrum Potsdam [GFZ], and Washington State University [WSU]

Subjects
Diffraction, Materials science, Solid-gas reaction, X-ray free electron laser, Diamond-anvil cell, Iron, Iron nitride, synthesis, Nitrogen, x-ray heating, Analytical chemistry, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], 02 engineering and technology, Activation energy, 010402 general chemistry, 01 natural sciences, Diamond anvil cell, high temperature, chemistry.chemical_compound, extreme condition, Chemical reactions, X-rays, General Materials Science, ddc:530, Irradiation, Physical and Theoretical Chemistry, iron nitride, ComputingMilieux_MISCELLANEOUS, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], XFEL, X-ray, Free-electron laser, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, high pressure, chemistry, diamond anvil cell, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Ultrashort pulse, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy
Abstract

The journal of physical chemistry letters 12(12), 3246 - 3252 (2021). doi:10.1021/acs.jpclett.1c00150, The ultrafast synthesis of ε-Fe$_3$N$_{1+x}$ in a diamond-anvil cell (DAC) from Feand N$_2$ under pressure was observed using serial exposures of an X-ray free electron laser (XFEL). When the sample at 5 GPa was irradiated by a pulse train separated by 443 ns, the estimated sample temperature at the delay time was above 1400 K, confirmed by in situ transformation of $α$- to $γ$-iron. Ultimately, the Fe and N$_2$ reacted uniformly throughout the beam path to form Fe$_3$N$_{1.33}$, as deduced from its established equation of state (EOS). We thus demonstrate that the activation energy provided by intense X-ray exposures in an XFEL can be coupled with the source time structure to enable exploration of the time-dependence of reactions under high-pressure conditions., Published by ACS, Washington, DC

Published
2021
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