Research and development for the SPES target L. Biasetto, M. Manzolaro, A. Andrighetto, G. Meneghetti, S. Carturan, P. Zanonato, P. Colombo and G. Prete Eur. Phys. J. A, 42 3 (2009) 517-521 Published online: 29 April 2009 DOI: 10.1140/epja/i2008-10776-1