One of the highlights of the European research infrastructure landscape is the world's most powerful X-ray-laser, the European XFEL. The ELBEX (Extracted Lepton Beam at the European XFEL) proposal builds on this strength and will set up new opportunities for European scientists and innovators, by providing an extracted high energy electron beam for experiments. With ELBEX we propose a pathfinder project to demonstrate the feasibility of such a facility at the European XFEL. This unique new possibility would strengthen the global competitiveness of the European Research Area and create opportunities for new user groups. The high energy, high charge density and excellent quality of the electron beam, if brought into interaction with a strong laser beam, opens up the study of a range of scientific topics, most prominently, of strong field Quantum Electrodynamics (QED). For the first time, the Schwinger limit for the electromagnetic field strength, at which non-perturbative QED effects become relevant, could be reached experimentally in this facility. Studying the particles created in the photon beam dump opens up the possibility to search for feebly interacting particles, complementing current or planned experiments like FASER II or SHiP. In addition, the electron beam itself is at the centre of a range of highly relevant and ambitious experiments in the area of accelerator science and detector science. Within the ELBEX project, the installation of a facility to extract an electron beam from the European XFEL using a fast kicker magnet and to transport it into a multi-purpose experimental area will be prepared. On the condition that a positive decision by the European XFEL council is reached to grant an extended 12-week XFEL shutdown, the installation of the ELBEX facility is an option.

High-assay low-enriched uranium metal (HALEU) is a critical resource required for the operation of research reactors and the production of pharmaceutical radioisotopes. Its availability is essential for advancing nuclear energy safety, materials science, basic scientific research, and the performance of about 40 million nuclear medicine procedures worldwide each year. Until recently, EU has relied on Russia and the USA for its supply of HALEU. Russian supplies are expected to be unavailable for an extended period, and the future availability of US supplies remains uncertain: it is thus imperative for EU to establish its own HALEU production capacity. The PreP-HALEU initiative represents a preparatory phase aimed at producing essential components and evaluating the technical pathways for establishing this capacity in EU. This project consortium brings together all key stakeholders, including enrichment companies, fuel manufacturers, research organizations, and medical radioisotope producers. Through this collaborative effort, PreP-HALEU intends to: • Generate substantial technical, economic, and regulatory information to support the decision-making process. • Foster alignment among the countries and parties involved in establishing a EU HALEU capability as a shared asset. Within the framework of PreP-HALEU, the quantitative requirements for HALEU metal will be updated, and working groups will delve into enrichment, metallization, and transportation considerations. The integration of these elementary bricks will be extensively discussed to create a coherent project dynamic and consistently consolidate results into an executive summary, a key input for the decision-making phase. The PreP-HALEU project, initiated in response to the NRT01-11 call for proposals, is a cornerstone in the establishment of a EU production capacity for metal HALEU. It plays a pivotal role in securing activities in the fields of research, healthcare, and innovation throughout EU.

OpenDreamKit will deliver a flexible toolkit enabling research groups to set up Virtual Research Environments, customised to meet the varied needs of research projects in pure mathematics and applications and supporting the full research life-cycle from exploration, through proof and publication, to archival and sharing of data and code. OpenDreamKit will be built out of a sustainable ecosystem of community-developed open software, databases, and services, including popular tools such as LinBox, MPIR, Sage(sagemath.org), GAP, PariGP, LMFDB, and Singular. We will extend the Jupyter Notebook environment to provide a flexible UI. By improving and unifying existing building blocks, OpenDreamKit will maximise both sustainability and impact, with beneficiaries extending to scientific computing, physics, chemistry, biology and more and including researchers, teachers, and industrial practitioners. We will define a novel component-based VRE architecture and the adapt existing mathematical software, databases, and UI components to work well within it on varied platforms. Interfaces to standard HPC and grid services will be built in. Our architecture will be informed by recent research into the sociology of mathematical collaboration, so as to properly support actual research practice. The ease of set up, adaptability and global impact will be demonstrated in a variety of demonstrator VREs. We will ourselves study the social challenges associated with large-scale open source code development and of publications based on executable documents, to ensure sustainability. OpenDreamKit will be conducted by a Europe-wide demand-steered collaboration, including leading mathematicians, computational researchers, and software developers long track record of delivering innovative open source software solutions for their respective communities. All produced code and tools will be open source.

The main goal of M4F project is to bring together the fusion and fission materials communities working on the prediction of microstructural-induced irradiation damage and deformation mechanisms of irradiated ferritic/martensitic (F/M) steels. M4F project is a multidisciplinary one, were both modeling and experiments at different scales will be integrated to foster the understanding of complex phenomena associated to the formation and evolution of irradiation induced defects and their role on the deformation behavior. In addition, an attempt to reduce the gap between the materials science activities as model and experiments, and the needed inputs on design codes will be included