arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6773physics.opticsphysics.plasm-ph
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拍瓦laser吸收有界

Petawatt laser absorption bounded

Matthew C. Levy, Scott C. Wilks, Max Tabak, Stephen B. Libby, Matthew G. Baring

摘要:

拍瓦($10^{15}\ \mathrm{W}$)激光器与固体物质的相互作用构成了台式粒子加速器、超快成像系统和激光聚变等先进科学应用的基础。这些应用的关键度量与吸收有关,然而在这种状态下的条件是如此非线性,以至于通常不可能知道吸收光的分数$f$,甚至$f$的范围也是未知的。在这里,使用相对论性朗肯-Hugoniot分析,我们第一次表明,$f$具有理论上的最大值和最小值。这些界限限制了非线性吸收机制在拍瓦政权,禁止高吸收值在低激光功率和低吸收值在高激光功率。对于需要规避吸收边界的应用,这些结果将加速从固体靶向结构化和多层靶的转变,并引领新材料的开发。

英文摘要:

The interaction of petawatt ($10^{15}\ \mathrm{W}$) lasers with solid matter forms the basis for advanced scientific applications such as table-top particle accelerators, ultrafast imaging systems and laser fusion. Key metrics for these applications relate to absorption, yet conditions in this regime are so nonlinear that it is often impossible to know the fraction of absorbed light $f$, and even the range of $f$ is unknown. Here using a relativistic Rankine-Hugoniot-like analysis, we show for the first time that $f$ exhibits a theoretical maximum and minimum. These bounds constrain nonlinear absorption mechanisms across the petawatt regime, forbidding high absorption values at low laser power and low absorption values at high laser power. For applications needing to circumvent the absorption bounds, these results will accelerate a shift from solid targets, towards structured and multilayer targets, and lead the development of new materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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