H-mode pedestal behavior in low collisionality regimes on Alcator C-Mod

H-mode experiments on the Alcator C-Mod tokamak have exploited a wide range of operational parameters, in order to make expanded studies of pedestal structure, edge relaxation mechanisms and the related level of global confinement. Three specific regimes have received increased attention in recent studies: high triangularity ($\delta_{\mbox{lower}}\approx 0.75$), high toroidal field ($B_T\approx 8\mbox{T}$), and reversed $B_T$. Operation in these regimes has yielded pedestal temperatures of nearly 1keV, giving relatively low values for edge collisionality, $\nu^\star<1$. At low $\nu^\star$, H-modes do not favor the steady state enhanced-$\mbox{D}_\alpha$ (EDA) regime, but tend either to exhibit edge-localized modes (ELMs) or to be transiently ELM-free. In these regimes we study the temporal behavior of pedestal density and temperature profiles (especially their widths and gradients) and compare to that in the well-characterized EDA. Of particular interest is whether a ballooning-like scaling for pressure gradient observed in the EDA H-mode edge persists in less collisional pedestals.