Oxford Centre for High Energy Density Science (OxCHEDS)

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From microjoules to megajoules and kilobars to gigabars: Probing matter at extreme states of deformation

Physics of Plasmas AIP Publishing 22:9 (2015) 090501

Authors:

Bruce A Remington, Robert E Rudd, Justin S Wark
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Simulations of in situ x-ray diffraction from uniaxially compressed highly textured polycrystalline targets

Journal of Applied Physics AIP Publishing 118:6 (2015) 065902

Authors:

David McGonegle, Despina Milathianaki, Bruce A Remington, Justin S Wark, Andrew Higginbotham
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Laser-driven platform for generation and characterization of strong quasi-static magnetic fields

New Journal of Physics IOP Publishing 17:8 (2015) 083051

Authors:

JJ Santos, M Bailly-Grandvaux, L Giuffrida, P Forestier-Colleoni, S Fujioka, Z Zhang, P Korneev, R Bouillaud, S Dorard, D Batani, M Chevrot, JE Cross, R Crowston, J-L Dubois, J Gazave, G Gregori, E d’Humières, S Hulin, K Ishihara, S Kojima, E Loyez, J-R Marquès, A Morace, P Nicolaï, O Peyrusse, A Poyé, D Raffestin, J Ribolzi, M Roth, G Schaumann, F Serres, VT Tikhonchuk, P Vacar, N Woolsey
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Direct Observation of Melting in Shock-Compressed Bismuth With Femtosecond X-ray Diffraction.

Physical review letters 115:9 (2015) 095701

Authors:

MG Gorman, R Briggs, EE McBride, A Higginbotham, B Arnold, JH Eggert, DE Fratanduono, E Galtier, AE Lazicki, HJ Lee, HP Liermann, B Nagler, A Rothkirch, RF Smith, DC Swift, GW Collins, JS Wark, MI McMahon

Abstract:

The melting of bismuth in response to shock compression has been studied using in situ femtosecond x-ray diffraction at an x-ray free electron laser. Both solid-solid and solid-liquid phase transitions are documented using changes in discrete diffraction peaks and the emergence of broad, liquid scattering upon release from shock pressures up to 14 GPa. The transformation from the solid state to the liquid is found to occur in less than 3 ns, very much faster than previously believed. These results are the first quantitative measurements of a liquid material obtained on shock release using x-ray diffraction, and provide an upper limit for the time scale of melting of bismuth under shock loading.
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Beamed neutron emission driven by laser accelerated light ions

(2015)

Authors:

S Kar, A Green, H Ahmed, A Alejo, APL Robinson, M Cerchez, R Clarke, D Doria, S Dorkings, J Fernandez, SR Mirfyazi, P McKenna, K Naughton, D Neely, P Norreys, C Peth, H Powell, JA Ruiz, J Swain, O Willi, M Borghesi
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