The design study for a 500 MeV proton synchrotron with CSNS linac as an injector

TL;DR

This paper proposes a 500 MeV proton synchrotron using the CSNS linac as an injector, detailing its design, beam dynamics, injection, and extraction methods for multidisciplinary applications.

Contribution

It presents a novel compact lattice design and optimized beam extraction techniques for a high-energy proton synchrotron utilizing existing linac infrastructure.

Findings

Successful design of a compact lattice for 500 MeV proton synchrotron

Implementation of multi-turn injection with beam stripping

Optimized slow extraction with RF knock-out method

Abstract

Using the China Spallation Neutron Source (CSNS) linac as the injector, a 500 MeV proton synchrotron is proposed for multidisciplinary application, such as biology, material and proton therapy. The synchrotron will deliver proton beam with energy from 80 MeV to 500 MeV. A compact lattice design was worked out, and all the important beam dynamics issues were investigated. The 80 MeV H- beam is stripped and injected into the synchrotron by using multi-turn injection. In order to continuously extraction the proton with small beam loss, the achromatic structure is proposed and slow extraction method with RF knock-out is adopted and optimized.