Design and development of Diamond-II accelerator control system

Diamond light source is a 3rd-generation synchrotron light source that has been operating since 2007. The existing accelerator control system is based on EPICS V3, and a mixture of VME hardware, PCs and embedded devices. An upgrade of Diamond to Diamond-II is now in the construction phase with installation set to begin in January 2028, followed by storage ring commissioning in Oct 2028. A new control system is currently under development, leveraging existing infrastructure while modernizing key components. The updated control system will be built on EPICS 7 with software deployed via Kubernetes clusters. This paper outlines the system requirements, development activities, planning, and deployment strategy, for the Diamond-II accelerator control system.