Status of the fabrication and test of the prototype LHC lattice quadrupole magnets. [Large Hadron Collider]

Within the framework of the Large Hadron Collider (LHC) R and D program, CERN and CEN/Saclay have established a collaboration to carry out, amongst others, the design, building, and testing of a superconducting LHC prototype quadrupole at the Saclay laboratory. The twin aperture prototype, working in liquid helium at 1.8 K, has a gradient of 250 T/m, is about 3.2 m long, with a coil aperture of 56 mm. This paper describes the present state of the R and D work for the quadrupole magnet, reviewing the fabrication and validation tests of the design.