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首页> 外文会议>Conference on Laser-Assisted Micro- and Nanotechnologies 2003; Jun 29-Jul 3, 2003; St. Petersburg, Russia >Laser driven shock experiments at PALS
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Laser driven shock experiments at PALS

机译：PALS的激光驱动冲击实验

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摘要

Here we discuss the results of the experiments performed using the Prague Asterix Laser System (PALS) of wavelength 0.44 μm (3ω of Iodine laser) and energy ≈ 250 J in 450 ps (FWHM). Two sets of experiments were carried out, firstly, generation of high quality shocks which were steady in time and uniform in space using Phase Zone Plates (PZP), to establish the scaling laws of shock pressure Vs. laser intensity for aluminum foil target of thickness 8 μm. Our results show a good agreement with the delocalized laser absorption model. Secondly, measurements of the Equation of State of carbon compressed by shocks at megabars of pressure have been realized. Equation of State were obtained for carbon using the impedance mismatch technique. Step targets allowed the simultaneous measurements of shock velocity in two different materials. Aluminum was used as a reference material and relative EOS data for carbon have been obtained up to ≈ 14 Mbar pressure.
机译：在这里，我们讨论使用波长为0.44μm（碘激光器的3ω）和能量≈250 J in 450 ps（FWHM）的Prague Asterix激光系统（PALS）进行的实验结果。进行了两组实验，首先，使用相区板（PZP）生成时间稳定且空间均匀的高质量冲击，以建立冲击压力Vs的缩放定律。厚度为8μm的铝箔靶材的激光强度。我们的结果表明与离域激光吸收模型有很好的一致性。其次，已经实现了在兆兆巴压力下通过冲击压缩的碳的状态方程的测量。使用阻抗失配技术获得了碳的状态方程。台阶式靶允许同时测量两种不同材料的冲击速度。铝被用作参考材料，并且在不超过14 Mbar的压力下获得了碳的相对EOS数据。

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