THE 11 T NbTi SUPERCONDUCTING MAGNETS COOLED WITH SUPERFLUID HELIUM S. Han, Z. Feng, C.Y. Lin, S.S. Song et K.W. Li J. Phys. Colloques, 45 C1 (1984) C1-807-C1-811 DOI: 10.1051/jphyscol:19841165