The beam exchange of a circular cooler ring with a ultrafast harmonic kicker

TL;DR

This paper presents a harmonic kicker system for the Jefferson Lab Electron Ion Collider's Circulator Cooling Ring, enabling ultra-fast beam exchange without compromising beam quality, through detailed design and simulation analysis.

Contribution

It introduces a novel harmonic kicker design and demonstrates its effectiveness via numerical simulations for beam exchange in a collider cooling ring.

Findings

The harmonic kicker achieves ultra-fast beam deflection.

Simulations show minimal beam degradation with the new system.

Cooling efficiency remains within acceptable limits despite harmonic kicks.

Abstract

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(JLEIC). By delivering an ultra-fast 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, is studied in detail with a scheme that keeps the cooling efficiency within allowable limits.