Using Chromaticity to Suppress Instabilities at ${\hat{I}}_t^3$ Transition

Abstract

For many synchrotrons which cross ${\hat{I}}_t^3$ transition, a high intensity threshold has been identified beyond which significant beam losses are observed. These losses are due to a high-intensity mode coupling instability, which can be suppressed by adjusting the chromaticity curve to cross zero slightly after ${\hat{I}}_t^3$ transition.

17th International Particle Accelerator Conference (IPAC 2026)