通过提取微聚束的空间相干分量加速自由电子激光模拟的收敛
Accelerating the convergence of free electron laser simulations by retrieving a spatially-coherent component of microbunching
AI总结：
本文提出通过提取微聚束空间相干分量来抑制伪影，从而显著减少FEL模拟所需宏粒子数，使计算时间降低1至2个数量级。
摘要：
本文提出一种降低自由电子激光（FEL）模拟数值成本的简单方法，其基础是提取微聚束的空间相干分量，以抑制可能高估FEL增益的伪影效应；这显著减少了达到数值收敛所需的宏粒子数量，并使得无需求解波动方程即可直接计算放大辐射。为验证所提方法而进行的FEL模拟示例表明，根据模拟条件的不同，获得可靠结果的计算时间可减少1至2个数量级。
英文摘要：
A simple method to reduce the numerical cost in free electron laser (FEL) simulations is presented, which is based on retrieving a spatially-coherent component of microbunching to suppress artifact effects that can potentially overestimate the FEL gain; this significantly reduces the number of macroparticles to reach the numerical convergence and enables the direct computation of amplified radiation without solving the wave equation. Examples of FEL simulations performed to demonstrate the proposed method show that the computation time to get a reliable result is reduced by 1-2 orders of magnitude depending on the simulation condition.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
