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The SPES Exotic Beam ISOL Facility: a combination of scientific and technical challenges.

Gramegna F.
  Venerdì 30/09   09:00 - 12:00   Edificio Psicologia 2 - Aula 3F   I - Fisica nucleare e subnucleare
The SPES (Selective Production of Exotic Species) exotic beam facility is being constructed at the Legnaro National Laboratory (LNL) in Italy. The Radioactive Beam project is mainly related to the development of an ISOL facility for neutron-rich element production by means of an intense proton beam (of the order of few hundreds of $\mu$A), directly sent onto a sliced $UC_{x}$ target, with the aim of producing up to $10^{13}$ fissions/s. The proton driver, which is a very innovative cyclotron able to produce up to 70 MeV proton intense beam (up to 750 $\mu$A beam current), can deliver two beams simultaneously. This opportunity gives the possibility of performing also interdisciplinary physics studies and appliance, especially devoted to material analysis, neutron production and medical applications (like, for example, the production of radio-isotopes). The phase of the project dedicated to nuclear Physics is called Beta and it is devoted to the production of quite intense exotic beams, especially in the mass range 80--140, which will be re-accelerated up to 10 MeV/n. The scientific program is under discussion based on the long-standing experience in nuclear structure and dynamics studies of the LNL and LNS international user communities. In particular, one of the traditional fields is the study of nuclei under extreme conditions, that is the study of the evolution of nuclear structure towards the region far from stability in terms of excitation energy (decay and behavior of hot nuclei), high spin states (highly rotating nuclei), and, finally, high isospin (high $N-over-Z$ ratio). Large efforts are devoted to the upgrading of installed experimental set-ups (GALILEO, PRISMA, GARFIELD etc.). The developments of new instrumentation (AGATA, ATS${}_{-}$ACTAR, FAZIA, NEDA, PARIS, TRACE, SPIDER etc.) are also performed within international collaborations in order to carry out up-to-date experimentation at SPES. The scientific challenging program will be discussed. Moreover, it will be underlined how, during the 3rd International SPES, which will be held at Legnaro National Laboratory on October 10--12, 2016, up-to-date letters of Intent will be presented and evaluated by the SPES Scientific International Committee.