Diamond Annual Review 2025-26

1MWdata centre The construction of the data centre is well underway with a planned completion date of February 2027. The data centre is a key Diamond‑II investment that will more than double current computing capacity and support rapidly growing scientific data needs. The purpose‑built facility will use efficient liquid‑cooling and free‑cooling technologies to reduce environmental impact while enabling high‑density HPC, storage and networking. Infrastructure Demineralised ‘A’ pipework upgrades: construction within the Storage Ring tunnel has progressed, with 70% of the facet wall works now completed. The upgrade works will increase the capacity of the distribution pipework to service the increased flow requirements for Diamond-II girders. 1MW Data Centre Demineralised A pipework upgrades Adiabatic coolers: In 2021, Diamond installed adiabatic coolers on two of the four main synchrotron chillers to supplement the heat rejection capacity of the existing dry air coolers. This form of cooling provides a lower condensing temperature to the main chillers which stabilises them in times of very high ambient temperatures. Further funding was provided in 2025 to install adiabatic coolers on the remaining two main chillers and works are well underway with a planned completion by the end of this summer. Uninterrupted supply supplies (UPS): various critical plant at Diamond is supported with UPS (battery backup) in times of mains power failures, ensuring that critical equipment does not have unwanted power interruptions. Many of Diamond’s UPS units were approaching end-of- life or had become too small for the increasing electrical loads required. Diamond commissioned the installation of 23 new UPS units across the facility, supporting electrical power loading requirements for machine and beamline- critical equipment. New and upgraded UPS units Adiabatic coolers 35 Buildings and infrastructure 36 Annual review 2025/26 Buildings and infrastructure