NSLS-II晶格设计与优化：复杂弯铁替换方案
Design and optimization of the NSLS-II lattice with complex bend replacement
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中文总结 AI 辅助
针对NSLS-II升级，本文提出用永磁复杂弯铁替换两个电磁偶极子，完成线性光学设计、非线性优化及误差评估，验证了足够的动力学孔径和束流孔径要求。
中文摘要 AI 辅助
对更亮光子束的需求推动了具有超低电子束发射度的衍射极限储存环的发展。最近，复杂弯铁（CB）晶格被提出作为未来NSLS-II升级的一种方案。作为此次升级的一步，NSLS-II计划将两个现有的电磁偶极子替换为永磁CB，从而在储存环中首次实验演示CB概念。本文介绍了修改后的NSLS-II晶格的线性光学设计、非线性优化和机器误差评估。优化后的晶格为离轴注入和常规运行提供了足够的动力学孔径和动量孔径，并且可以通过现有的NSLS-II校正方案进行校正。在计划CB安装位置附近的刮板测量验证了CB设计中使用的束流孔径要求。
英文摘要
The demand for brighter photon beams has driven the development of diffraction-limited storage rings with ultralow electron beam emittance. A complex bend (CB) lattice was recently proposed as an approach for the future NSLS-II upgrade. As a step toward this upgrade, NSLS-II plans to replace two existing electromagnetic dipoles with permanent-magnet CBs, providing the first experimental demonstration of the CB concept in a storage ring. This paper presents the linear optics design, nonlinear optimization, and machine error evaluation of the modified NSLS-II lattice. The optimized lattice provides sufficient dynamic and momentum apertures for off-axis injection and routine operation and can be corrected with the existing NSLS-II correction scheme. Scraper measurements near the planned CB installation location validate the beam aperture requirements used in the CB design.
发表机构
- Brookhaven National Laboratory（布鲁海文国家实验室）
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