Fig. 3: Progressive cooling of the TCV divertor.
From: Real-time feedback control of the impurity emission front in tokamak divertor plasmas
C-III emission in TCV tokamak discharge #62154 for increasing radiative cooling of the divertor. The detected emission front is indicated in red. a Emission throughout the divertor leg: Emission front touches the wall. b The emission front creeps up toward X-point (c) Emission front close to the X-point. d Poloidal mapping of the divertor leg (blue) and emission front (black cross) in (a) in the TCV vacuum vessel with plasma emissivity from tomographic reconstruction in the background. The control parameter Lpol, the arc length from emission front to divertor target, is highlighted in white.
