In this paper, we describe a harmonic kicker system used in the beam exchange scheme for the circulator cooling ring (CCR) of the Jefferson Lab Electron-Ion Collider. By delivering an ultrafast deflecting kick, a kicker directs electron bunches selectively in/out of the CCR without degrading the beam dynamics of the CCR optimized for ion-beam cooling. We will discuss the design principle of the kicker system and demonstrate its performance with various numerical simulations. In particular, the degrading effects of realistic harmonic kicks on the beam dynamics, such as 3D kick field profiles interacting with the magnetized beam, are studied in detail with a scheme that keeps the cooling efficiency within allowable limits.

中文翻译：

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带有超快谐波喷射器的循环冷却器环的光束交换

在本文中，我们描述了在杰斐逊实验室电子离子对撞机的循环器冷却环 (CCR) 的光束交换方案中使用的谐波喷射系统。通过提供超快的偏转踢，踢球器可以选择性地将电子束引导进/出 CCR，而不会降低针对离子束冷却优化的 CCR 的束动力学。我们将讨论踢球系统的设计原理，并通过各种数值模拟展示其性能。特别是，通过将冷却效率保持在允许范围内的方案，详细研究了现实谐波冲击对梁动力学的退化影响，例如与磁化梁相互作用的 3D 冲击场轮廓。