Abstract
IRFU/SACM at CEA/Saclay has undertaken an R&D program on Nb3Sn aimed at designing, building and testing a 1-m-long, 56-mm-single-aperture quadrupole magnet model. Model design is based on the design of LHC arc quadrupole magnets, without iron yoke. It is expected to reach a nominal field gradient of 211 T/m at 11,870 A. The main goal of the program is to learn about Nb3Sn technology and evaluate fabrication techniques relative to the use of this superconductor. Coils are manufactured by the so called ldquowind, react and impregnaterdquo technique. Laminated, austenitic steel collars are locked around the coil assembly by means of keys in order to restrain Lorentz forces. Coil manufacturing and magnet assembly have been achieved in 2007. Cold mass assembly is under work. Warm field measurements are carried out at each step of magnet and cold mass assembly. After a brief recall of the conceptual design, the paper reviews the manufacturing of the coils and of the magnet assembly and presents the results of warm magnetic field measurements.
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