Speaker
Description
The first step towards high critical currents in Bi-2212 wires was the comprehension that the supercurrent is blocked over long lengths by filament-diameter bubbles growing from the porosity of the powders during the partial melting phase. The Over Pressure (OP) process led to the realization of dense Bi-2212 wires with a $J_E$ performance far beyond the minimum application requirements, but not easily scalable to real coils. Researchers at CNR-SPIN are developing a standard and scalable process based on mechanical deformation to realize dense Bi-2212 wire with performances useful for applications. Initial evidence of the effectiveness of the process has already been reported. Now we are able to realize wires with a $J_E$ satisfying the application requirements.
One of the challenges we are facing is trying to understand if GDG Bi-2212 wires can be arranged into a Rutherford cable, whose fabrication process could lead to wire properties degradation.
Here I report, through finite-element simulation and transport properties characterization, about the effects of the mechanical deformation on the wires brought by such process.
