硬 X 射脉冲的实验演示
光学
2025-06-10 v1 加速器物理
摘要
我们present了 first direct experimental confirmation of attosecond pulse generation in the hard X-ray regime with a free-electron laser。我们的实验基于对已知的非线性光现象的测量，即来自 3d 过渡金属的放大自发辐射（ASE）。通过分析 Linac Coherent Light Source 上由 ultrashort pulses 诱导的 collective X-ray fluorescence yield，我们识别了 attosecond pulses 的生成以及从 100 as 到 400 as 的脉冲时长 shot-to-shot 波动。观察到的带宽和脉冲时长之积对于 100 as 脉冲约为 2 fseV，表明接近 transform-limited 脉冲的生成。我们的 results 将 attosecond 技术的光子能量范围提高了一个数量级，提供了 ability 同时以电子现象的时间尺度探测物质并具有原子空间分辨率。 Furthermore，attosecond hard X-ray pulses 可以超越最快的 radiation damage processes，为 single-shot damage-free X-ray measurements 铺路了道路。
引用
@article{arxiv.2506.07968,
title = {Experimental demonstration of attosecond hard X-ray pulses},
author = {Ichiro Inoue and River Robles and Aliaksei Halavanau and Veronica Guo and Thomas M. Linker Andrei Benediktovitch and Stasis Chuchurka and Matthew H. Seaberg and Yanwen Sun and Diling Zhu and David Cesar and Yuantao Ding and Vincent Esposito and Paris Franz and Nicholas S. Sudar and Zhen Zhang and Taito Osaka and Gota Yamaguchi and Yasuhisa Sano and Kazuto Yamauchi and Jumpei Yamada and Uwe Bergmann and Matthias F. Kling and Claudio Pellegrini and Makina Yabashi and Nina Rohringer and Takahiro Sato and Agostino Marinelli},
journal= {arXiv preprint arXiv:2506.07968},
year = {2025}
}