Using a double-frequency RF system to facilitate on-axis beam accumulation in a storage ring

TL;DR

This paper proposes a double-frequency RF system for storage rings that enables on-axis beam injection and accumulation by creating and manipulating RF buckets, improving injection efficiency in rings with small dynamic aperture.

Contribution

It introduces a novel RF scheme that combines on-axis injection with beam accumulation, addressing limitations of small dynamic aperture storage rings.

Findings

Successful creation of empty RF buckets for injection

Effective longitudinal dumping of injected bunches

Maintained beam accumulation capability

Abstract

An on-axis injection scheme using a double-frequency RF system in a storage ring with small dynamic aperture is proposed. By altering RF voltages, empty RF buckets can be created which will be used for on-axis injection. After bunches are injected, a reverse RF voltage altering process is performed and the injected bunches can be longitudinally dumped to the main RF buckets. The scheme allows reaping the advantages of the on-axis injection while still performing accumulation.