标题： 逐 shot 获取超快电子衍射 显示英文标题

标题： Shot-to-shot acquisition ultrafast electron diffraction

摘要： 我们展示了一种用于超快散射实验中光学泵浦-千电子伏特电子能量探测的新型逐发采集方法。 我们在传统的超快电子衍射（UED）设置中集成了一个重复频率为20kHz的相位锁定采集方案。 我们进一步对不同配置和现实场景中的噪声水平进行了全面表征。 逐发采集方法将信噪比（SNR）提高了一个数量级，并可轻松应用于其他高重复频率的电子衍射和光谱设置中。 显示英文摘要

摘要： We demonstrate a novel shot-to-shot acquisition method for optical pump - keV electron energy probe in ultrafast scattering experiments. We integrate a phase-locked acquisition scheme at a repetition rate of 20kHz in a conventional ultrafast electron diffraction (UED) setup. We proceed to a full characterization of the noise level in different configurations and for realistic scenarios. The shot-to-shot acquisition improves the signal-to-noise ratio (SNR) by one order of magnitude and can be readily implemented in other high-repetition rate electron diffraction and spectroscopy setups.