论文标题
单射击时间分辨的传输电子显微镜中的空间电荷像差
Space Charge Aberrations in Single Shot Time-Resolved Transmission Electron Microscopy
论文作者
论文摘要
在本文中，我们讨论了空间电荷场对单个时间分辨电子显微镜（TEM）中成像性能的影响。使用绿色的函数扰动方法，我们得出了空间电荷非线性对图像形成过程和相关像差系数的影响的分析估计。这些系数对初始梁相空间分布的依赖性被阐明。结果通过粒子跟踪模拟验证，并为单次时间分辨的TEM提供基本的缩放定律，以使时间和空间分辨率之间的权衡。
In this paper, we discuss effects of space charge fields on imaging performance in a single shot time-resolved electron microscope (TEM). Using a Green's function perturbation method, we derive analytical estimates for the effects of space charge nonlinearity on the image formation process and the associated aberration coefficients. The dependence of these coefficients on the initial beam phase space distribution is elucidated. The results are validated by particle tracking simulations and provide fundamental scaling laws for the trade-off between temporal and spatial resolution in single-shot time-resolved TEM.
