NEW HIGH-TEMPERATURE SUPERCONDUCTING CABLE-IN-CONDUIT CONDUCTOR DESIGN FOR LARGE MAGNETS APPLICATION
The article is devoted to the development of high-performance high-temperature superconducting (HTS) cable and cable-in-conduit conductor (CICC) design for large magnets application, including magnets for prospective thermonuclear installations. One of the main problem that needs to be solved for the successful implementation of such projects is the creation of high-current HTS conductors for toroidal field coils and central solenoid sections. To solve successfully this problem, it is necessary to develop a HTS conductor with a high engineering current density in strong magnetic fields up to 20 T. There should be enough space in the conductor structure, for the placement of stabilizing and strengthening materials, and for cooling channels. Preliminary calculations show that for various electromagnetic subsystems of a thermonuclear reactor, the required design current density along the conductor ranges from 30 A/mm<sup>2</sup> to 50 A/mm<sup>2</sup>. The article provides an analysis of the previously proposed various design options for high-current conductors based on HTS materials and proposes new, original design solutions that, according to the authors opinion, allows to achieve higher performance.