通过检索微束的空间相干成分加速自由电子激光模拟的收敛性

IF 1.5 3区物理与天体物理 Q3 PHYSICS, NUCLEAR

Physical Review Accelerators and Beams Pub Date : 2024-03-19 DOI:10.1103/physrevaccelbeams.27.030703

Takashi Tanaka

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引用次数: 0

摘要

本文介绍了一种降低自由电子激光器（FEL）模拟中数值成本的简单方法，该方法基于检索微束的空间相干分量，以抑制可能高估 FEL 增益的伪影效应；这大大减少了达到数值收敛所需的大粒子数量，并能利用半解析公式计算放大辐射。为演示所建议的方法而进行的激光雷达模拟实例表明，获得可靠结果所需的计算时间可根据模拟条件减少 1-2 个数量级。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Accelerating the convergence of free electron laser simulations by retrieving a spatially coherent component of microbunching

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Accelerating the convergence of free electron laser simulations by retrieving a spatially coherent component of microbunching

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 macroparticle to reach the numerical convergence and enables the computation of amplified radiation with semianalytical formulas. 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.

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来源期刊

Physical Review Accelerators and Beams Physics and Astronomy-Surfaces and Interfaces

CiteScore

3.90

自引率

23.50%

发文量

158

审稿时长

23 weeks

期刊介绍： Physical Review Special Topics - Accelerators and Beams (PRST-AB) is a peer-reviewed, purely electronic journal, distributed without charge to readers and funded by sponsors from national and international laboratories and other partners. The articles are published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. It covers the full range of accelerator science and technology; subsystem and component technologies; beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron-radiation production, spallation neutron sources, medical therapy, and intense-beam applications.