Robustness Optimization for Compact Free-electron Laser Driven by Laser Wakefield Accelerators

We present a conceptual design for LWFA-driven FELs with enhanced robustness and reliability. By employing Bayesian optimization techniques, the beamline was optimized to achieve sufficient tolerance against these fluctuations under actual experimental conditions. Start-to-end simulations revealed that this systematic optimization significantly reduces the system's sensitivity to parametric variations. With the optimized configurations, the radiation energy can be maintained above 1 μJ at a wavelength of approximately 25 nm, even when accounting for twice the root-mean-square (RMS) ranges of these inherent jitters.

本研究提出了一种具备增强鲁棒性与可靠性的激光尾波场加速（Laser Wakefield Acceleration, LWFA）驱动自由电子激光（Free Electron Laser, FEL）概念设计方案。通过采用贝叶斯优化（Bayesian optimization）技术，研究团队对该束线进行了优化，使其在实际实验条件下对各类波动具备足够的耐受能力。全程模拟结果表明，该系统性优化可显著降低系统对参数变化的敏感度。在采用优化配置的情况下，即便考虑到这些固有抖动的两倍均方根（root-mean-square, RMS）波动范围，辐射能量仍可在约25 nm的波长下维持在1 μJ以上。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于激光尾波场加速器驱动的紧凑型自由电子激光的鲁棒性优化研究，通过贝叶斯优化技术提升束线设计对实验波动的容忍度，确保在约25纳米波长下辐射能量维持在1微焦耳以上。数据集包含模拟结果和相关文件，用于支持物理领域的优化方法验证。