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A preliminary design study for the next-generation European ISOL Radioactive Nuclear Beam Facility
It is projected to perform a preliminary design study of the next-generation European ISOL Radioactive Nuclear Beam (RNB) facility, which will extend and amplify, beyond 2010, the exciting work presently carried out by the first-generation facilities in various scientific disciplines. The first phase was a 4-year feasibility study (2000-2003) supported by the European Commission during the 5th Framework programme (FP5), as a Research and Technical Development (RTD) project in Nuclear Physics. In this phase, the scientific and technical challenges posed by such a facility were thoroughly investigated, the required R&D were identified and a cost estimate made, taking into account the possible synergies with other major European installations and projects. The final report can be found on this web page. HTML file of the presentations given at the 2nd Town Meeting, Abano Terme (Italy), January 24-25, 2002 Administrative details about EURISOL in FP5: Proposal of the EURISOL_DS, submitted in March 2004: Our group takes part in the Task 11 of the EURISOL_DS project. This task is dedicated to calculations of secondary-beam intensities. The purpose of a future European ISOL-based secondary-beam facility is to deliver beams of radioactive nuclei with the highest intensities and with the most wide-spread neutron-to-proton ratio possible for experiments which aim for improving our knowledge on nuclear properties far from the valley of beta stability, reaching towards the drip lines. Obviously, the estimation of the available secondary-beam intensities and in particular of the limitations in their neutron-to-proton ratio is of prime importance for the prospects of such a facility. Moreover, these estimations, performed for different possible technical solutions, will have a decisive influence on the preferences given to the different technical options in the design phase. The actual knowledge on attainable beam intensities in ISOL-based secondary-beam facilities, driven by protons of about 1 GeV, mostly relies on the long-term experience in such facilities, e.g. ISOLDE at CERN. However, it is not easy to disentangle the formation cross sections, which are given by physics, and the release, ionization and transport efficiencies, which are subject to progress in technology. Systematic data on spallation cross sections with protons around 1 GeV became available only recently for selected systems by innovative inverse-kinematics experiments at GSI. Nuclide cross sections from spallation or heavy-ion induced reactions at lower energies are still scarce. Therefore, studies on the complex scenario of fragmenting post-accelerated ISOL beams as a promising option to access extremely neutron-rich nuclides and on the reactions of heavy-ions will provide key information for technical options of the EURISOL design.
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