Electron-ion equilibration in ultrafast heated graphite.
We have employed fast electrons produced by intense laser illumination to isochorically heat thermal electrons in solid density carbon to temperatures of ∼10,000  K. Using time-resolved x-ray diffraction, the temperature evolution of the lattice ions is obtained through the Debye-Waller effect, and this directly relates to the electron-ion equilibration rate. This is shown to be considerably lower than predicted from ideal plasma models. We attribute this to strong ion coupling screening the electron-ion interaction.
Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
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White
Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
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Hartley
Goethe-Universität, D-60438 Frankfurt am Main, Germany.
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Borm
Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom and AWE, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
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Crowley
AWE, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
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Harris
ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum fr Schwerionenforschung, 64291 Darmstadt, Germany.
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Hochhaus
Helmholtzinstitut Jena, Fröbelstieg 1, D-07743 Jena, Germany.
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Kaempfer
ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum fr Schwerionenforschung, 64291 Darmstadt, Germany.
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Li
ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum fr Schwerionenforschung, 64291 Darmstadt, Germany.
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Neumayer
AWE, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
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Pattison
Goethe-Universität, D-60438 Frankfurt am Main, Germany.
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Pfeifer
Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom and AWE, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
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Richardson
Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxfordshire OX11 0QX, United Kingdom.
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Robinson
Helmholtzinstitut Jena, Fröbelstieg 1, D-07743 Jena, Germany.
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Uschmann
Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
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Gregori