利用机器学习优化和控制超强激光-固体相互作用中的同步辐射

IF 5.2 1区 物理与天体物理 Q1 OPTICS High Power Laser Science and Engineering Pub Date : 2023-02-14 DOI:10.1017/hpl.2023.11
J. Goodman, M. King, E. J. Dolier, R. Wilson, R. Gray, P. McKenna
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引用次数: 1

摘要

利用高斯过程回归的贝叶斯优化方法,研究了超强激光脉冲与平面箔相互作用时同步辐射产生的最佳参数。同步辐射的个别性质,如产量,是最大化的,并同时缓解轫致辐射是实现多变量目标函数。激光脉冲对目标的入射角对同步加速器的产率和角分布有很大的影响,斜入射角产生的效果最好。在三维模拟中进一步探讨了这一点,其中通过改变激光的偏振来证明同步加速器发射的空间轮廓的额外控制。结果证明了应用基于机器学习的优化方法的实用性,并为激光箔相互作用中辐射产生的物理学提供了新的见解,这将为量子电动力学(QED)等离子体体系的实验设计提供信息。
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Optimization and control of synchrotron emission in ultraintense laser–solid interactions using machine learning
Abstract The optimum parameters for the generation of synchrotron radiation in ultraintense laser pulse interactions with planar foils are investigated with the application of Bayesian optimization, via Gaussian process regression, to 2D particle-in-cell simulations. Individual properties of the synchrotron emission, such as the yield, are maximized, and simultaneous mitigation of bremsstrahlung emission is achieved with multi-variate objective functions. The angle-of-incidence of the laser pulse onto the target is shown to strongly influence the synchrotron yield and angular profile, with oblique incidence producing the optimal results. This is further explored in 3D simulations, in which additional control of the spatial profile of synchrotron emission is demonstrated by varying the polarization of the laser light. The results demonstrate the utility of applying a machine learning-based optimization approach and provide new insights into the physics of radiation generation in laser–foil interactions, which will inform the design of experiments in the quantum electrodynamics (QED)-plasma regime.
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来源期刊
High Power Laser Science and Engineering
High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics
CiteScore
7.10
自引率
4.20%
发文量
401
审稿时长
21 weeks
期刊介绍: High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.
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