The superconducting wires that ensure continuous circulation of the high intensity electrical current necessary for operation are one of the key systems of the ITER Tokamak.
The manufacturing of this system will be performed by six of the seven ITER Members. The approaches, methods and techniques may be different in each of these countries, but if we ask a competent professional to define the role of superconductor technology in the future installation, the answer will be the same everywhere: the superconductor is a system of vital importance for ITER—it is the blood in the vascular system of this giant machine.
Requirements for the manufacturing of superconductors are therefore particularly strict. And the cable itself is a work of technical art.
Superconductors destined for ITER are a unique cable product containing more than ten thousand very thin filaments, usually not more than 2 to 6 microns thick. The human hair, in comparison, is about 40 to 110 microns.
Manufacturing includes a succession of delicate operations that require both "Swiss accuracy" and "Russian ingenuity." Patience is an equally important parameter: it takes approximately nine months to transform raw materials into the final product.
Back in Soviet times, when every Republic participated in the process for the sake of the common purpose, the manufacturing of superconductors was concentrated in Kazakhstan. Now, it has become necessary for Russia to develop its own manufacturing industry.