Annual Review 2024-2025

A N N U A L R E V I E W 2 0 2 4 / 2 5 46 D I A MO N D - I I U P D AT E • installation of penetrations in the shield wall, for later installation of waveguides to feed power to the new locations of the RF accelerating cavities. The first of 7 new penetrations was successfully installed in the March 2025 shutdown; • installation of modifications to the demineralised water cooling circuit “Demin A”: 11 of 24 cells have so far been completed; • vacuum rack upgrades to overcome obsolescence and to reduce space requirements: 3 of 24 cells have so far been completed; • 4 of the 18 front-end X-ray beam position monitor upgrades which are required for compatibility with Diamond-II and are planned to be carried out before the upgrade period have been completed; • cable re-routing in the Control & Instrumentation Areas: 4 of 24 cells have so far been completed; • installation of front-end patch panels: 9 of 31 front-ends have been modified so far; • upgrading over 400 ADC cards used in the Magnet Power Supplies; • upgrading and commissioning 650 units of 25 A Magnet Power Supplies to 50 A; • upgrading and commissioning of one of the transformers in the Booster Quadrupole Power Supply, which will be repurposed as the BB Dipole Power Supply in Diamond-II. The Diamond-II project has been making impressive progress over the last year, taking full advantage of shutdowns to de-risk the upgrade period. Significant amounts of procurement have taken place, and in many cases budgets have proved robust; in conjunction with financial and risk management this has allowed the release of contingency scope into the project. So far £5m of additional scope has been added, mainly focused towards the 1 MW data centre and improving the operational resilience of the radiofrequency (RF) systems. Future releases of contingency scope are expected to occur through the life of the project assuming the budget and risk profile allows, which should allow us to maximise the scientific and operational benefits from Diamond-II. The high-level plan for Diamond-II remains robust, with the only milestone moving so far being the completion of the Diamond Extension Building (DEB). This slight delay has not impacted the overall programme as there was contingency built within the plan along with the team working hard to look at options to mitigate any impact to the larger programme. A major focus this year has been on procurement - completing designs and specifications, issuing Invitations to Tender, and subsequently placing contracts and monitoring the Suppliers’ progress. 30 major orders were placed in the year, bringing the total committed cost to 53% of the total hardware budget for the machine. Alongside this work, the team have been carrying out as much installation activity as possible before the shutdown for Diamond-II to minimise work during the “upgrade period”. This has involved, for example: Diamond-II update Matt Fletcher Head of Programmes