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Laser-driven single shock compression of fluid deuterium from 45 to 220 GPa

机译：激光驱动的流体氘单次冲击压缩范围为45至220 GPa

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摘要

The compression (η) of liquid deuterium between 45 and 220 GPa under laser-driven shock loading has been measured using impedance matching to an aluminum (Al) standard. An Al impedance-match model derived from a best fit to absolute Hugoniot data has been used to quantify and minimize the systematic errors caused by uncertainties in the high-pressure Al equation of state. In deuterium below 100 GPa results show that η=4.2, in agreement with previous impedance-match data from magnetically driven flyer and convergent-explosive shock wave experiments; between 100 and 220 GPa η reaches a maximum of -5.0, which is less than the sixfold compression observed on the earliest laser-shock experiments but greater than expected from simple extrapolations of lower-pressure data. Previous laser-driven double shock results are found to be in good agreement with these single shock measurements over the entire range under study. Both sets of laser-shock data indicate that deuterium undergoes an abrupt increase in compression at around 110 GPa.
机译：已经使用与铝（Al）标准匹配的阻抗测量了在激光驱动的冲击负载下45至220 GPa之间的液态氘压缩（η）。从对绝对Hugoniot数据的最佳拟合得出的Al阻抗匹配模型已用于量化和最小化由高压Al状态方程中的不确定性引起的系统误差。在低于100 GPa的氘中，结果表明η= 4.2，与先前来自磁驱动飞行器和会聚爆炸冲击波实验的阻抗匹配数据一致； 100至220 GPaη之间的最大值达到-5.0，小于最早的激光冲击实验中观察到的六倍压缩率，但大于低压数据的简单外推法所预期的值。发现先前的激光驱动双冲击结果与整个研究范围内的这些单冲击测量结果非常吻合。两组激光冲击数据均表明，氘在110 GPa左右的压力下突然增加。

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  • 来源
    《Physical review》 |2009年第4期|198-215|共18页
  • 作者

    D. G. Hicks; T. R. Boehly; P. M. Celliers; J. H. Eggert; S. J. Moon; D. D. Meyerhofer; G. W. Collins;

  • 作者单位

    Lawrence Livermore National Laboratory, Livermore, California 94550, USA;

    Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA;

    Lawrence Livermore National Laboratory, Livermore, California 94550, USA;

    Lawrence Livermore National Laboratory, Livermore, California 94550, USA;

    Lawrence Livermore National Laboratory, Livermore, California 94550, USA;

    Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA;

    Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA;

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