Plasma Performance and Operational Space with an RMP-ELM Suppressed Edge

The operational space and plasma performance of plasmas with RMP-ELM suppressed edges are surveyed by comparing AUG, DIII-D, EAST, and KSTAR operating points. RMP-ELM suppression is achieved over a range of plasma currents (Ip=0.4-1.7MA), toroidal fields (Bt=1.3-2.5T), and RMP mode number (1-4). Consistent operational windows in edge safety factor are found across devices, while windows in plasma shaping parameters are distinct. Accessed pedestal parameters reveal a quantitatively similar pedestal density limit for RMP-ELM suppression in all devices of just over 3x10¹⁹ m^-3. This is surprising given the wide variance of many engineering parameters and edge collisionalities (varying from <0.1 to >10). Wide ranges in input power, confinement time, and stored energy exist, with the achieved triple product found to scale like the product of Ip, Bt, and radius. Preliminary energy confinement scaling laws for RMP-ELM suppressed plasmas are presented and compared with expectations from established scalings. Improved statistical regression is found if plasma rotation is included. Results identify common physics for RMP-ELM suppression and highlight the need to pursue this no-ELM regime at higher magnetic field or different plasma size.