Operational Sequencer for ESS facility

The European Spallation Source (ESS) is set to become the world's most powerful neutron source, enabling groundbreaking research across a wide range of scientific disciplines. A key tool used in its operation is the ESS Sequencer — a software tool designed to automate commonly executed high-level Main Control Room procedures required for the facility’s functionality. By using predefined sequences, it improves repeatability and reliability of the processes by minimizing the potential for human error. We will discuss the technical challenges addressed by the ESS Sequencer, including task execution types, architectural design, and system scalability. Additionally, we will highlight recent upgrades and future developments aimed at further enhancing the framework’s capabilities. The implementation of the ESS Sequencer marks a major milestone for the ESS Integrated Control System Software group and is expected to significantly contribute to ESS operations and reduction of time required to deliver neutrons for experiments.