arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2207.04239physics.acc-ph
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基于多频RF系统的第四代储存环光源纵向注入多目标优化

Multi-objective optimization of longitudinal injection based on a multi-frequency RF system for fourth-generation storage ring-based light sources

Weihang Liu, Yi Jiao, Yu Zhao, Jianliang Chen, Yanliang Han, Sheng Wang

摘要:

在第四代储存环光源(4GLS)中,由于多弯消色差透镜设计中固有的极强非线性,其动态接受度通常较小,难以实现传统的离轴局部凸点注入。为满足动态验收要求,探索了轴向纵向注水方案。本文以我国自主研制的4GLS-南方先进光子源为例,对多频射频系统的纵向注入进行了多目标优化设计。我们表明,通过治疗的最佳束延长条件作为一个优化目标,而不是一个条件,必须满足,可以找到大量的可行的候选解决方案,显示不同的权衡之间的多个目标。从这些候选解决方案中,可以找到最适合于特定4GLS物理设计和注入喷射器的可用技术水平的最佳RF参数设置。特别地,在由双频RF系统实现的静态桶内实现纵向注入是可行的,这为4GLS提出了有吸引力的纵向注入选项。

英文摘要:

In the fourth-generation storage ring light sources (4GLSs), associated with the extremely strong nonlinearities inherent in the multi-bend achromat design, the dynamic acceptance is usually small and it is difficult to implement traditional off-axis local-bump injection. To release the requirement on dynamic acceptance, on-axis longitudinal injection schemes have been explored. In this paper, we present a multi-objective optimization of longitudinal injection with a multi-frequency RF system, based on the parameters of the Southern Advanced Photon Source, a 4GLS proposed in China. We show that by treating the optimal bunch lengthening condition as an optimizing objective rather than a condition that must be satisfied, a plethora of feasible candidate solutions can be found, showing different trade-offs among multi-objectives. From these candidate solutions, one can find an optimal RF parameter setting that is most adapted to a specific 4GLS physics design and the available technical level of injection kicker. Especially, it would be feasible to realize longitudinal injection within a static bucket enabled by a double-frequency RF system, suggesting an attractive longitudinal injection option for 4GLSs.

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。

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