Development of High Non-Inductive Fraction High Poloidal Beta Discharges at ITER Q$=$5 Equivalent Performance on DIII-D

Modelling of DIII-D high poloidal beta scenario predicts new off-axis current drive capabilities will enable nearly 100{\%} non-inductive operation at ITER Q$=$5 equivalent performance. Experiments on DIII-D have extended high energy confinement (H98\textgreater 1.5), large radius internal transport barrier (ITB) operation from q95$\ge $10 to lower q95\textasciitilde 7, which is more relevant for the ITER steady-state mission. While large Shafranov shift can stabilize all ion turbulence at betaN\textasciitilde 3 and q95$\ge $10, some drift wave instabilities remain in the lower q95 regime. With betaN$=$3.8, gyrokinetic simulations predict a stronger ITB and better confinement in comparison with experimental data at betaN$=$3.1. Recent DIII-D upgrades, including additional off-axis NBI power, increase off-axis external current drive. This should increase stability and non-inductive fraction at higher betaN. 0D modelling predicts betaN\textasciitilde 4 and H98\textasciitilde 1.5 should enable f\textunderscore NI\textasciitilde 90{\%} with q95\textasciitilde 7. It gives G98$=$betaN*H98/q95\textasciicircum 2\textasciitilde 0.122, matching the normalized performance goal of ITER's Q$=$5, according to the latest ITER simulations using high betap concept (G98\textasciitilde 0.113, J. McClenaghan, NF 2017) Work supported in part by US DOE under DE-SC0010685, DE-FC02-04ER54698, and NNSF of China under Grant No11575248.