Beam dynamics of the superconducting wiggler on the SSRF storage ring

TL;DR

This paper analyzes the beam dynamics effects of installing a superconducting wiggler in the SSRF storage ring, focusing on emittance growth and optimization of beam parameters to maintain performance.

Contribution

It presents a detailed study of beam dynamics impacts and optimization strategies for the superconducting wiggler in SSRF, addressing emittance growth and other effects.

Findings

Emittance growth can be mitigated with a local achromatic lattice.

Optimized lattice reduces beta beating and tune shift effects.

Simulations show maintained dynamic aperture with proper corrections.

Abstract

In the SSRF Phase-II beamline project, a Superconducting Wiggler (SW) will be installed in the electron storage ring. It may greatly impact on the beam dynamics due to the very high magnetic field. The emittance growth becomes a main problem, even after a well correction of the beam optics. A local achromatic lattice is studied, in order to combat the emittance growth and keep the good performance of the SSRF storage ring, as well as possible. Other effects of the SW are simulated and optimized as well, including the beta beating, the tune shift, the dynamic aperture, and the field error effects.