William J. Murphy
University of Oxford
11 Papers
17 Citations
William J. Murphy is an academic researcher from University of Oxford. The author has contributed to research in topics: Diffraction & Warm dense matter. The author has an hindex of 7, co-authored 11 publications.
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Papers
The strength of single crystal copper under uniaxial shock compression at 100 GPa
William J. Murphy,Andrew Higginbotham,Giles Kimminau,B. Barbrel,Eduardo M. Bringa,James Hawreliak,Ryosuke Kodama,M. Koenig,W McBarron,Marc A. Meyers,Bob Nagler,Norimasa Ozaki,Nigel Park,Bruce Remington,S. Rothman,Sam Vinko,T. Whitcher,Justin Wark +17 more
TL;DR: It is inferred, using molecular dynamics simulations and VISAR (standing for 'velocity interferometer system for any reflector') measurements, that the strength of the material increases dramatically (to approximately 1 GPa) for these extreme strain rates.
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In situ x-ray diffraction measurements of the c/a ratio in the high-pressure ε phase of shock-compressed polycrystalline iron
James Hawreliak,Bassem S. El-Dasher,Hector Lorenzana,Giles Kimminau,Andrew Higginbotham,Bob Nagler,Sam Vinko,William J. Murphy,T. Whitcher,Justin Wark,S. Rothman,Nigel Park +11 more
TL;DR: In this paper, the structure of laser-shock-compressed polycrystalline iron was probed using in situ x-ray diffraction over a pressure range spanning the $\ensuremath{\alpha}$-$\ensuremath{\epsilon}$ phase transition.
Predicting EXAFS signals from shock compressed iron by use of molecular dynamics simulations
Andrew Higginbotham,R. C. Albers,Timothy C. Germann,Brad Lee Holian,Kai Kadau,Peter S. Lomdahl,William J. Murphy,Bob Nagler,Justin Wark +8 more
TL;DR: In this paper, the authors compare simulated EXAFS signals from ab initio models and configurational averaging of molecular dynamics (MD) data for α-Fe, and configurationally averaged MD data are compared with experimental data for iron shock compressed to pressures above the α-e transition pressure.
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In-situ probing of lattice response in shock compressed materials using x-ray diffraction
James Hawreliak,Martin Butterfield,Huw Davies,Bassem S. El-Dasher,Andrew Higginbotham,Daniel H. Kalantar,Giles Kimminau,James McNaney,Despina Milathianaki,William J. Murphy,Bob Nagler,Nigel Park,Bruce Remington,Lee Thorton,T. Whitcher,Justin Wark,Hector Lorenzana +16 more
TL;DR: In this article, the authors used laser produced plasma x-ray sources coincident with laser driven shock waves to make in situ measurements of the lattice response during shock compression for both single crystal and polycrystalline materials.
Perspective for high energy density studies on x-ray FELs
Richard W. Lee,Bob Nagler,Ulf Zastrau,R. R. Fäustlin,Sam Vinko,T. Whitcher,R. Sobierajski,Jacek Krzywinski,Libor Juha,Art J. Nelson,Saša Bajt,K. S. Budil,R. C. Cauble,T. Bornath,Tomáš Burian,J. Chalupsky,Henry N. Chapman,J. Cihelka,Tilo Döppner,Thomas Dzelzainis,S. Düsterer,Marta Fajardo,E. Förster,Carsten Fortmann,Siegfried Glenzer,Sebastian Göde,Gianluca Gregori,Věra Hájková,Philip Heimann,Marek Jurek,Fida Khattak,A.R. Khorsand,Dorota Klinger,Michaela Kozlova,Tim Laarmann,Hyesog Lee,Karl-Heinz Meiwes-Broer,P. Mercere,William J. Murphy,Andreas Przystawik,Ronald Redmer,Heidi Reinholz,David Riley,Gerd Röpke,Karel Saksl,R. Thiele,Josef Tiggesbäumker,Sven Toleikis,Thomas Tschentscher,Ingo Uschmann,Roger Falcone,Roger Falcone,Ronnie Shepherd,Jerome B. Hastings,William E. White,Justin Wark +55 more
TL;DR: In this paper, the x-ray absorption of Warm Dense Matter (WDM) was investigated at the Free Electron Laser (FEL) facility at DESY. But the experimental results were limited to a range of intensities approaching 1018 W/cm2.
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