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MODELING OF LASER-GENERATED RADIATIVE BLAST WAVES

机译:激光产生的辐射爆炸波的建模

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We simulate experiments performed with the Falcon laser at Lawrence Livermore National Laboratory to generate strong, cylindrically diverging blast waves of relevance to astrophysics. In particular, we are interested in producing and modeling radiative shocks. We compare numerical simulations with the data and with an analytic approximation to blast-wave propagation with a radiative-loss term included. Our goal is to develop a laboratory setting for studying radiative shocks of relevance to supernova remnants, gamma-ray burst afterglows, and other high-energy astrophysics phenomena. We will show that a good degree of agreement exists between the experimental data and the numerical simulations, demonstrating that it is indeed possible to generate radiative shocks in the laboratory using table-top femtosecond lasers. In addition, we show how we can determine the energy-loss rate from the blast-wave evolution. This analytic method is independent of the exact mechanism of radiative cooling and is scalable to both the laboratory and astrophysical radiative blast waves.
机译:我们模拟在劳伦斯·利弗莫尔国家实验室使用猎鹰激光进行的实验,以产生与天体物理学相关的强烈的,圆柱形发散的爆炸波。特别是,我们对产生和模拟辐射冲击感兴趣。我们将数值模拟与数据进行比较,并将解析近似与包括辐射损耗项的爆炸波传播进行比较。我们的目标是建立一个实验室环境,研究与超新星遗迹,伽玛射线爆炸余辉和其他高能天体物理学现象有关的辐射冲击。我们将证明实验数据与数值模拟之间存在高度的一致性,表明使用台式飞秒激光器在实验室中确实有可能产生辐射冲击。此外,我们展示了如何根据爆炸波的演变确定能量损失率。这种分析方法与辐射冷却的确切机理无关,并且可扩展到实验室辐射和天体辐射爆炸波。

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