Online optimization of storage ring nonlinear beam dynamics

TL;DR

This paper introduces online optimization techniques to enhance the nonlinear beam dynamics in storage rings, demonstrating significant improvements in dynamic aperture through experimental application on SPEAR3.

Contribution

It presents novel online optimization algorithms for storage ring nonlinear dynamics and demonstrates their effectiveness through experimental results.

Findings

Dynamic aperture improved by over 5 mm

Successful application of conjugate direction search and particle swarm optimization

Rapid enhancement of storage ring performance

Abstract

We propose to optimize the nonlinear beam dynamics of existing and future storage rings with direct online optimization techniques. This approach may have crucial importance for the implementation of diffraction limited storage rings. In this paper considerations and algorithms for the online optimization approach are discussed. We have applied this approach to experimentally improve the dynamic aperture of the SPEAR3 storage ring with the robust conjugate direction search method and the particle swarm optimization method. The dynamic aperture was improved by more than 5 mm within a short period of time. Experimental setup and results are presented.