INFN/LNL, Legnaro
Padova University/Dept. Mech. Eng., Padova
Padova University/Dept. Chem., Padova
Pavia University/Dept. Chem., Pavia
Trento University/Dept. Mech. Eng., Trento
INFN/BO, Bologna
SPES is a facility to be built at National Institute of Nuclear Physics (INFN laboratory, Legnaro, Italy) intended to provide intense neutron-rich Radioactive Ion Beams (RIBs) directly hitting a UCx target with a proton beam of 40 MeV and 0.2 mA; RIBs will be produced according to the ISOL technique and the new idea that characterize the SPES project is the design of the production target: we propose a target configuration capable to keep high the number of fissions, low the power deposition and fast the release of the produced isotopes. In this work we will present the recent results on the R&D activities regarding the multi-foil direct UCx target.
INFN/LNL, Legnaro
University of Padova, Padova
The production target of the SPES project is going to produce neutron rich isotopes (Z > 40) by directly impinging a 40 MeV proton beam of I = 200 μA on 7 coaxial UCx porous thin disks. In order to produce a very intense exotic beam, a strong effort on target ion source development is necessary. In the SPES facility the standard ISOLDE MK1 surface ion source is used for 1+ ions production; in this kind of source a high temperature cavity of Tungsten (also Tantalum or Rhenium) is able to ionize efficiently the alkalis, rare-earth elements and low ionization potential molecules. In this way the ions are ready to be extracted and accelerated by means of an extraction electrode kept at 60 kV. In this work the Structural-Thermal-Electric behaviour of the MK1 ion source is studied, considering a full 3-D Coupled Structural-Thermal-Electric ANSYS® Finite Element model; FE results are compared with both potential difference and temperature measurements. To study the Electrostatic field of the extraction zone close to the ion source an ANSYS® FE Electrostatic model was developed.