Fabrication of ‘TAMU3’, a ‘Wind/React’ stress-managed 14T Nb3Sn block coil design

Abstract

The third phase of a high field dipole technology development, a full set (2+) of Stress-Managed winding modules is being fabricated. The dipole fabrication uses tooling, fixtures, procedures and technology modified and updated based on the second phase work and results reported plus new material developments and higher performance strand. The strand was furnished by the DOE HEP Nb3Sn conductor development program. The modules' cables were processed and cabled by the LBNL facility using the latest procedures developed. There were several new materials and processes introduced in this third phase to improve performance or simplify the fabrication which will be discussed. If all the performance inherent in the strand were to be achieved then the peak field should be higher than 14 T. The containment and flux return structure are the same as used in phase 2. This phase of the development will constitute the outer winding modules of a ‘Collider’ prototype Block dipole with Stress-Management. The lessons learned and the results obtained will be discussed.