Testing RMP ELM suppression models in low torque ITER Baseline Scenario

RMP ELM suppression experiments in low torque ($T_{inj}$) ITER Baseline Scenario provide an excellent test of our emerging model of ELM suppression when the edge plasma bifurcates to tearing response. In 2-fluid theory, this bifurcation occurs where the electron perpendicular rotation $\Omega_{\bot e}\sim0$, where $\Omega_{\bot e}$ is the sum of the $E\times B$ and electron diamagnetic rotation $\Omega_{D e}$ frequencies. To extend RMP ELM suppression to $T_{inj}\sim1$ Nm, we reduced $T_{inj}$ from 5 to 3.5 Nm, which produced lower core radial electric field and loss of ELM suppression as the $\Omega_{\bot e}\sim0$ point moved deeper into the core. We also varied $\Omega_{D e}$ at high $T_{inj}$ by reducing the edge electron density, which led to ELM suppression. These results will be compared with expectations from 2-fluid theory.