Performance of the LHC final design full scale superconducting dipole prototypes

Within the LHC magnet program, a series of six, final design, full-scale su perconducting dipole prototypes are presently being built in industry and t ested at CERN. The main features of these magnets are: two-in-one structure , 56 mm aperture, six-block two layer coils wound from 15.1 mm wide graded NbTi cables, and all-polyimide insulation. This paper reviews the main test results of magnets tested to day at 4.2 K and 1.8 K. The results of the qu ench training, conductor performance, magnet protection, sensitivity to ram p rate and field quality are presented and discussed in terms of the design parameters and the aims of the full scale dipole prototype program.