Tuesday, May 1, 2018
Highly energetic runaway electrons (REs) pose a major risk to future tokamak reactors. The spatiotemporal dynamics of REs has been explored in Alcator C-Mod. This talk will focus on the analysis of visible camera images which capture RE synchrotron radiation. The new synthetic diagnostic SOFT [M. Hoppe, et al., NF 58 (2018)] is used to reproduce experimental images, giving insight into the radial profile of REs. Apparent increased radial transport and subsequent loss of confinement is consistent with observation of MHD activity.