Time-dependent dynamical Bragg diffraction in deformed crystals by beam propagation method (BPM)

TL;DR

This paper introduces an FFT-based beam propagation method to efficiently simulate time-dependent x-ray diffraction in deformed crystals, aiding the design of advanced XFEL systems.

Contribution

It presents a novel application of FFT BPM for modeling dynamic x-ray diffraction in distorted crystals, addressing a key challenge in XFEL technology.

Findings

Effective simulation of x-ray beam propagation in deformed crystals

Application to cavity-based XFELs and self-seeding systems

Enhanced understanding of time-dependent diffraction phenomena

Abstract

This paper describes how to efficiently solve time-dependent x-ray dynamic diffraction problems in distorted crystals with an FFT-based beam propagation method (FFT BPM). We show examples of using the technique to simulate the propagation of x-ray beams in deformed crystals in space and time domains relevant to the cavity-based x-ray Free Electron Lasers (CBXFELs) and XFEL self-seeding systems.