流体动力学等离子体波导的基准测试：面向多GeV激光驱动电子加速
Benchmarking of hydrodynamic plasma waveguides for multi-GeV laser-driven electron acceleration
AI总结：
本研究对流体动力学等离子体波导进行基准测试，通过精确模拟贝塞尔光束与气体靶相互作用，结合实验验证，为多GeV至100 GeV级激光等离子体加速器设计提供可靠导模结构。
摘要：
由光场电离（OFI）引发的流体动力学等离子体波导近期已成为多GeV激光尾场加速器的关键组成部分。在此，我们提出了迄今为止最完整、最准确的实验与模拟表征，既适用于当前的多GeV实验，也适用于未来100 GeV量级的激光等离子体加速器。模拟的关键在于对强贝塞尔光束与米级气体靶相互作用的正确建模，其结果被用作流体动力学模拟的初始条件。模拟结果与我们的实验（利用双色短脉冲干涉测量法测量演化中的等离子体和中性氢密度分布）高度一致，从而能够实际确定导模结构，以应用于激光驱动等离子体加速器的设计。
英文摘要：
Hydrodynamic plasma waveguides initiated by optical field ionization (OFI) have recently become a key component of multi-GeV laser wakefield accelerators. Here, we present the most complete and accurate experimental and simulation-based characterization to date, applicable both to current multi-GeV experiments and future 100 GeV-scale laser plasma accelerators. Crucial to the simulations is the correct modeling of intense Bessel beam interaction with meter-scale gas targets, the results of which are used as initial conditions for hydrodynamic simulations. The simulations are in good agreement with our experiments measuring evolving plasma and neutral hydrogen density profiles using two-color short pulse interferometry, enabling realistic determination of the guided mode structure for application to laser-driven plasma accelerator design.
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