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# SPIRAL2@GANIL: a world leading ISOL facility in Europe at the dawn of the new decade

Abstract : To pursue the investigation of a new territory of nuclei with extreme N/Z called " terra incognita" several projects, all aiming at the increase by several orders of magnitude of the RIB intensities are now under discussions worldwide. The main goal of SPIRAL2 is clearly to extend our knowledge of the limit of existence and the structure of nuclei deeply in the medium and heavy mass region (A=60 to 140) which is to day an almost unexplored continent. SPIRAL 2 is based on a high power, CW, superconducting driver LINAC, delivering 5 mA of deuteron beams at 40MeV (200KW) directed on a C converter Uranium target and producing therefore more $10^13$ fissions/s . The expected radioactive beams intensities for exotic species in the mass range from A=60 to A=140, of the order of $10^6$ to $10^10$pps will surpass by two order of magnitude any existing facilities in the world. These unstable atoms will be available at energies between few KeV/n to 15 MeV/n. The same driver will accelerate high intensity (100$\mu$A to 1 mA), heavier ions up to Ar at 14 MeV/n producing also proton rich exotic nuclei. In applied areas SPIRAL2 is considered as a powerful variable energy neutron source, a must to study the impact of nuclear fission and fusion on materials. The intensities of these unstable species are excellent opportunities for new tracers and diagnostics either for solid state, material or for radiobiological science and medicine. The "Go" decision has been taken in May 2005. The investments costs amount to 95 ME and personnel costs to 34 ME, for the construction period 2005-2010. Funding from EU 7th framework and from others partnership countries are expected to contribute for about 20% to this budget. The status of the construction will be outlined. To shed light on the physics case , selected examples of new physics phenomena recently observed with the first generation of Radioactive Beam Facilities (RIB) in Europe will be discussed. Based on Letter of intents process ,large international collaborations are proposing innovative new instrumentation and methods for the for SPIRAL2 facility. Scientific and technical R&D programs in collaboration with EU and International partners will be presented.
Document type :
Conference papers
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http://hal.in2p3.fr/in2p3-00163273
Contributor : Michel Lion <>
Submitted on : Tuesday, July 17, 2007 - 10:48:13 AM
Last modification on : Thursday, February 1, 2018 - 1:34:54 AM

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• HAL Id : in2p3-00163273, version 1

### Citation

S. Galès. SPIRAL2@GANIL: a world leading ISOL facility in Europe at the dawn of the new decade. The International Symposium on Physics of Unstable Nuclei (ISPUN07), Jul 2007, Hoi An, Vietnam. pp.304-317. ⟨in2p3-00163273⟩

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