衍射受限光源中的高耦合非共振晶格设计

IF 3.6 1区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Yi-Hao Gong, Shun-Qiang Tian, Xin-Zhong Liu, Shou-Zhi Xuan, Li-Yuan Tan, Ling-Long Mao
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引用次数: 0

摘要

圆光束操作为同步辐射科学实验和减弱衍射限制同步辐射光源中光束内散射的影响带来了许多好处。本研究提出了一种基于倾斜四极的全局设置和非支配排序遗传算法的圆光束生成方法。在上海同步辐射设施升级方案的候选晶格中探索了两种方案,包括通过贝塔射线耦合和垂直色散引入的大幅射耦合。研究了发射率随晶格缺陷的变化及其对光束光学畸变的光束动力学的影响。结果表明,在低光学畸变条件下,可以实现从 10%到 100%的精确耦合控制,而通过调整位于无色散部分的偏斜四极分量,我们提出的方法可以实现全耦合产生及其稳健性。图谢克寿命增加了 2-2.5 倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Highly coupled off-resonance lattice design in diffraction-limited light sources

Highly coupled off-resonance lattice design in diffraction-limited light sources

The round-beam operation presents many benefits for scientific experiments regarding synchrotron radiation and the weakening influences of intra-beam scattering in diffraction-limited synchrotron light sources. A round-beam generation method based on the global setting of skew quadrupoles and the application of a non-dominated sorting genetic algorithm was proposed in this study. Two schemes, including large-emittance coupling introduced via betatron coupling and vertical dispersion, were explored in a candidate lattice for an upgrade-proposal of the Shanghai synchrotron radiation facility. Emittance variations with lattice imperfections and their influence on the beam dynamics of beam optic distortions were investigated. The results demonstrated that a precise coupling control ranging from 10 to 100% was achieved under low optical distortion, whereas full-coupling generation and its robustness were achieved by our proposed method by adjusting the skew quadrupole components located in the dispersion-free sections. The Touschek lifetime increased by a factor of 2–2.5.

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来源期刊
Nuclear Science and Techniques
Nuclear Science and Techniques 物理-核科学技术
CiteScore
5.10
自引率
39.30%
发文量
141
审稿时长
5 months
期刊介绍: Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.
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