Performance test of REBCO CICC sub-cables with l0 kA current under 20 T background field

The recent letter on SUST reports the tests of two 10 kA prototype conductors in the background field of 20 T [3]. The layout of the cables is "wrapping multi-layers of tape around a core". The prototypes are intended to be sub-components for a larger cable, where six such elements are arranged around a central channel [4]. The most significant and novel achievement is the range of combined operating current and background field. Indeed, most tests at 20 T background field are for small conductors, with operating current up to 1 kA.