Figure 14.

Strain extrapolations from a single $I_{\text{c}}(B)$ curve at 4.03 K and an applied strain of 0.32% (cross symbols, nested in the upper grouping of curves). Data are for the WST-ITER conductor, uncorrected for self field: symbols show measured data, and curves the calculated $I_{\text{c}}(B)$ results. The RMS extrapolation error is 0.117%, only 0.01% higher than fitting the entire dataset (second row of table A2). Extrapolated curves are shown at 4.03 K for a wide range of applied strains (–0.72% to +0.56%) (intrinsic strains of –1.02% to +0.26%). $I_{\text{c}}(B)$ curves are extrapolated with equation-set (11) and the Invariant strain function [equations (17)–(18)]. Values of $p$ and $q$ are fixed to those used for the core parameters (second row of table A2).