“Chongming” laser-plasma experimental facility and scientific research at Shanghai Jiao Tong University
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摘要: 超短超强激光技术的快速发展，极大推动了物理学在极端强场环境下的前沿探索。相关研究涵盖紧凑型粒子加速器、高亮度辐射源、非线性强场量子电动力学及强激光驱动的轴子暗物质产生和探测等多个重要方向。过去十余年，上海交通大学在本领域开展了系统性的理论、模拟和实验研究，先后建成了基于单束百太瓦级激光的相对论等离子体研究平台及具备高精度时空同步的双束百太瓦级激光驱动的极端相对论等离子体研究平台。本文对新建成的双束百太瓦“重明”激光等离子体实验装置的整体构成、关键参数与核心特色进行介绍，并进一步阐述依托以往和新建成装置完成和计划开展的前沿科学研究工作，包括激光固体高次谐波、激光等离子体尾波加速、非线性康普顿散射及强激光轴子暗物质产生和探测。新装置的建成运行，将为极端相对论等离子体物理实验研究提供重要的平台支撑。Abstract: The rapid development of ultra-short and ultra-intense laser technology has greatly advanced frontier research in physics under extreme strong-field conditions. This includes compact accelerators, high-brightness radiation sources, nonlinear strong-field quantum electrodynamics, as well as the production and detection of axion dark matter based on intense lasers. Over the past decade, Shanghai Jiao Tong University has carried out systematic theoretical, simulation and experimental research in this field, and has successively built a relativistic plasma research platform based on a single-beam hundred terawatt-level laser and an extreme relativistic plasma research platform based on a dual-beam hundred terawatt-level laser with high-precision spatiotemporal synchronization. In this paper, we present the layout, key parameters and characteristics of the newly commissioned dual-beam “Chongming” Laser-plasma Experimental Facility (CLEF), and highlights both completed and ongoing scientific activities, including the studies on laser-solid high-order harmonic generation, laser-plasma wakefield acceleration, nonlinear Compton scattering, and the production and detection of axion dark matter driven by intense lasers. The completion and operation of this facility will provide an essential supporting platform for experimental research in the field of extreme relativistic plasma physics.
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图 1 “重明”激光装置实物照片及结构框图
Figure 1. Photograph of the “Chongming” laser facility and its block diagram
图 2 “重明”激光等离子体实验装置的整体光路和腔体分布图，以及光束传输及双靶场系统的实物照片
Figure 2. Schematic layout of the overall optical path and vacuum chambers of the “Chongming” laser-plasma experimental facility, photograph of the beam transport and dual-target chamber system
图 3 “重明”装置锐角靶场实物图，研究者在靶室内检查和调节双光指向
Figure 3. Photograph of the acute-angle target area of the CLEF and dual-beam pointing alignment inside the target chamber
图 4 “重明”装置钝角靶场实物图和研究者在真空靶室内调节光路
Figure 4. Photograph of the obtuse-angle target area of the CLEF and optical path adjustment inside the vacuum target chamber
图 7 基于弯曲等离子体通道的激光尾波级联加速
Figure 7. Staged laser wakefield acceleration based on curved plasma channels
图 8 强场QED国际研究进展及计划：从经典散射到量子辐射
Figure 8. Roadmap of strong-field QED research: scaling from classical scattering to quantum radiation regimes
图 9 全光学逆康普顿散射产生高能涡旋伽马光子的实验装置示意图及高斯模式与拉盖尔-高斯模式对撞激光在焦点处的光斑分布
Figure 9. Schematic of vortex gamma-ray generation via all-optical inverse Compton scattering; the focal spot patterns of the Gaussian and LG colliding laser
图 10 四种激光碰撞构型产生的伽马射线角分布
Figure 10. Angular distribution of γ rays generated by four colliding laser modes
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