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High Pressure Research
An International Journal
Volume 24, 2004 - Issue 1
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Original Articles

Coupling static and dynamic compressions: first measurements in dense hydrogen

, , , , , , , , , , , , , , , & show all
Pages 25-31 | Received 14 Aug 2003, Accepted 28 Aug 2003, Published online: 08 Jun 2010
 

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.

Acknowledgements

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

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