Comparison between x-ray scattering and velocity-interferometry measurements from shocked liquid deuterium.
Comparison between x-ray scattering and velocity-interferometry measurements from shocked liquid deuterium.
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DOI：
10.1103/physreve.87.043112
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
K. Falk;S. Regan;J. Vorberger;B. Crowley;S. Glenzer;S. X. Hu;C. Murphy;P. Radha;A. Jephcoat;J. Wark;D. Gericke;G. Gregori
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文献类型：
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作者：
K. Falk;S. Regan;J. Vorberger;B. Crowley;S. Glenzer;S. X. Hu;C. Murphy;P. Radha;A. Jephcoat;J. Wark;D. Gericke;G. Gregori
轻元素状态方程是了解类木行星结构和惯性约束核聚变研究的基础。欧米茄激光被用来在低温冷却的氘中驱动平面激波，创造温暖的致密物质条件。在后向散射几何中，利用窄带x射线源，用x射线散射来确定集体和非集体散射边界附近的光谱。因此，我们的散射光谱对单个电子运动和集体等离子体行为都很敏感，并提供了电子密度、温度和电离状态的测量。我们的数据与K. Falk等人先前在相同的氘激波条件下进行的速度干涉测量结果一致[High Energy Density physics . 8,76(2012)]。这项工作提出了两种诊断系统的比较，并提供了遇到的挑战的详细讨论。
The equation of state of light elements is essential to understand the structure of Jovian planets and inertial confinement fusion research. The Omega laser was used to drive a planar shock wave in the cryogenically cooled deuterium, creating warm dense matter conditions. X-ray scattering was used to determine the spectrum near the boundary of the collective and noncollective scattering regimes using a narrow band x-ray source in backscattering geometry. Our scattering spectra are thus sensitive to the individual electron motion as well as the collective plasma behavior and provide a measurement of the electron density, temperature, and ionization state. Our data are consistent with velocity-interferometry measurements previously taken on the same shocked deuterium conditions and presented by K. Falk et al. [High Energy Density Phys. 8, 76 (2012)]. This work presents a comparison of the two diagnostic systems and offers a detailed discussion of challenges encountered.