Development of a 120-mm Aperture Nb3Sn Dipole Coil With Stress Management

This paper describes a 120-mm aperture 2-layer dipole coil with stress\nmanagement (SM) developed at Fermilab based on cos-theta coil geometry. A model\nof the coil support structure made of plastic was printed using additive\nmanufacturing technology and used for practice coil winding. The real coil\nsupport structure was printed using the 316 stainless steel. The results of the\nSM structure size control and the key coil fabrication steps are reported in\nthe paper. The design of coil SM structure and the coil FEA in the dipole\nmirror test configurations are presented and discussed.\n