Analysis of the Flattening on Bi-2212 Wires Due to the Cabling Process and Its Effect on Their Performances

Bi-2212 superconducting round wire is one of the candidates for the development of magnets with fields largely above 20 T. One of the most crucial aspects is the possible wire degradation occurring in the cabling process, a mandatory step to achieve a very high current and essential for high field magnets. Here we report a general study on the performance's behaviour of Bi-2212 round wires following a deformation similar to that arising during the cabling assembly. Furthermore, we propose a preliminary 2D Finite Element Model to simulate the mechanical deformation that can be valuable to gain useful information for the development of high-quality cables. In the end, Bi-2212 wires we made and test don't show degradation, consistently with the results of the proposed model which confirms the reliability of the adopted assumptions.