Development of Radiation-tolerant Slow-Control Board based on Atom Switch-based FPGA

The Atom Switch-based FPGA (AS-FPGA) is a promising candidate for high-radiation environments, such as those encountered in future particle physics experiments using accelerators. To assess its feasibility, we conducted neutron and gamma-ray irradiation tests. No single event upsets were detected at least up to 10¹¹ and 10¹² n/cm² with and without applied voltage, respectively. The AS-FPGA withstood displacement damage dose levels at least up to 1014 n/cm² and exhibited no total ionizing dose effects at least up to 5 and 10 kGy with and without applied voltage, respectively. These results confirm its suitability for high-radiation environments. To facilitate its practical application, we developed an evaluation board to investigate its functions and performance. A prototype slow-control board incorporating a commercial slow-control sensor was constructed. This prototype was used to implement basic logic for temperature data acquisition and tested under neutron irradiation. The slow-control board operated successfully in a high-radiation environment up to 10¹¹ n/cm², demonstrating the potential of the AS-FPGA and the slow-control board for future particle physics experiments.