Design, Manufacturing Aspects and Performance of Recent 10 m Long Model Dipole Superconducting Magnets for the LHC Project

A number of twin aperture, 10 m long, model dipole magnets for the LHC Project have been built and tested. With regard to the models of the first generation, the inner coil diameter and the intra-beam distance were increased from 50 to 56 mm and from 180 to about 194 mm, respectively. Also with regard to the previous models, a 5-block (instead of a 6-block) coil cross-section was chosen and the wid th of the Rutherford cable was reduced from 17 mm to 15 mm. The coils were manufactured and collared in Industry, the assembly of their magnetic circuit and cold mass were carried out at CERN. The ind ividual design and manufacturing features of each of these magnets are described and the results of their warm and cold magnetic measurement are presented and discussed.