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Original Articles

Coupling static and dynamic compressions: first measurements in dense hydrogen

P. Loubeyre Département de Physique Théorique et Applications, CEA, Commissariat à l'Energie Atomique, 91680, Bruyères-le-Châtel, FranceCorrespondence[email protected]

P. M. Celliers Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

D. G. Hicks Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

E. Henry Dipartimento di Fisica, Universita di Milano-Biocca, 20126, Milan, Italy

A. Dewaele Département de Physique Théorique et Applications, CEA, Commissariat à l'Energie Atomique, 91680, Bruyères-le-Châtel, France

J. Pasley Central Laser Facility CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK

J. Eggert Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

M. Koenig LULI Ecole Polytechnique, 91128, Palaiseau, France

F. Occelli Département de Physique Théorique et Applications, CEA, Commissariat à l'Energie Atomique, 91680, Bruyères-le-Châtel, France

K. M. Lee Department of Earth and Planetary Science, University of California, Berkeley, CA, 94720-4767, USA

R. Jeanloz Department of Earth and Planetary Science, University of California, Berkeley, CA, 94720-4767, USA

D. Neely Central Laser Facility CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK

A. Benuzzi-Mounaix LULI Ecole Polytechnique, 91128, Palaiseau, France

D. Bradley Central Laser Facility CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK

M. Bastea Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

Steve Moon Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

G. W. Collins Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, USA

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Abstract

We demonstrate here a laser-driven shock wave in a hydrogen sample, pre-compressed in a diamond anvil cell. The compression factors of the dynamic and static techniques are multiplied. This approach allows access to a family of Hugoniot curves which span the P–T phase diagram of fluid hydrogen to high density. In this first-of-its-kind experiment, two hydrogen Hugoniot curves have been partially followed starting from pre-compression at pressures of 0.7 GPa and 1.2 GPa. Optical reflectance probing at two wavelengths reveals the onset of the conducting fluid state. The boundary line to conducting fluid hydrogen is suggested.

Keywords:

Acknowledgements

The laser shocks were performed with the Vulcan laser at the Rutherford Appleton Laboratory.

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Coupling static and dynamic compressions: first measurements in dense hydrogen

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Coupling static and dynamic compressions: first measurements in dense hydrogen

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