Experimental parameter space. Each point represents a shot and is placed based on its value of the two ideal MHD instability parameters, q_a and n. Shots that experienced multiple eruptions are represented with red triangles, while noneruptive shots are blue circles. Four different regions of stability can be seen, though their boundaries are not perfectly defined by the parameters. The dashed line at q_a = 0.67 is an empirical cutoff used to isolate the torus instability transition from the failed torus regime. For later analysis, we will only consider the shots to the left of this line.