Gaussian Schell Source as Model for Slit-Collimated Atomic and Molecular Beams

Hard X-ray optics simulation using the coherent mode decomposition of Gaussian Schell model

The propagation of hard X ray beam from partially coherent synchrotron source is simulated by using the novel method based on the coherent mode decomposition of Gaussian Schell model and wave front propagation. We investigate how the coherency properties and intensity distributions of the beam are changed by propagation through optical elements. Here, we simulate and analyze the propagation of the partially coherent radiation transmitted through an ideal slit. We present the first simulations for focusing partially coherent synchrotron hard X ray beams using this novel method. And when compare…

Evaluation of Twisted Gaussian Schell Model beams produced with phase randomized coherent fields

The twisted Gaussian Schell Model describes a family of partially coherent beams that present several interesting characteristics, and as such have attracted attention in classical and quantum optics. Recent techniques have been demonstrated to synthesize these beams from a coherent source using a discrete set of "pseudo-modes", where the phase of each mode is randomized so that they are mutually incoherent. Here we investigate this technique and evaluate the resulting beam parameters, such as divergence, coherence length and twist phase. We show that for a finite set of modes there is also so…

光栅相干特性的理论分析

Theoretical Analysis of the Coherence Properties of a Grating

本文理论分析X射线经VLS光栅后焦平面的空间相干性，揭示带宽导致的空间-频率耦合效应，并推导部分相干高斯Schell模型及狭缝单色仪条件下的相干度表达式。