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arXiv 1808.07067physics.plasm-ph
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高强度Laser -等离子体相互作用中光子的可观测喷流

Jet Observable for Photons from High-Intensity Laser-Plasma Interactions

Scott V. Luedtke, Lance A. Labun, Ou Z. Labun, Karl-Ulrich Bamberg, Hartmut Ruhl, Björn Manuel Hegelich

摘要:

发现高强度激光-等离子体相互作用中的量子辐射动力学和设计新的激光驱动高能粒子源的目标都需要准确和可靠的预测。实验依赖于细胞中的粒子模拟来预测和解释结果,但是在模拟相互作用时的未知数限制了模拟的定性预测,太不确定而无法测试量子理论。为了建立定量预测的基础,我们引入了一个“喷气”观测参数化的发射光子分布和量化的高能量光子发射的高度定向通量。在各种物理条件下的可观察到的射流被识别,并且当激光脉冲形成通过目标的波长尺度通道时,射流被示出为最突出。最高能量的光子通常沿射流的方向发射。观测值与量子理论的光子发射特性是一致的。这项工作为实验和探测器的设计提供了定量指导,为利用光子发射解释高强度激光等离子体实验中的动力学和验证强场中的量子辐射理论提供了基础。

英文摘要:

The goals of discovering quantum radiation dynamics in high-intensity laser-plasma interactions and engineering new laser-driven high-energy particle sources both require accurate and robust predictions. Experiments rely on particle-in-cell simulations to predict and interpret outcomes, but unknowns in modeling the interaction limit the simulations to qualitative predictions, too uncertain to test the quantum theory. To establish a basis for quantitative prediction, we introduce a `jet' observable that parameterizes the emitted photon distribution and quantifies a highly directional flux of high-energy photon emission. Jets are identified by the observable under a variety of physical conditions and shown to be most prominent when the laser pulse forms a wavelength-scale channel through the target. The highest energy photons are generally emitted in the direction of the jet. The observable is compatible with characteristics of photon emission from quantum theory. This work offers quantitative guidance for the design of experiments and detectors, offering a foundation to use photon emission to interpret dynamics during high-intensity laser-plasma experiments and validate quantum radiation theory in strong fields.

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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