Fig. 5: Feedback exhaust control in Elongated and Super-X divertor configuration in MAST-U. | Nature Energy

Fig. 5: Feedback exhaust control in Elongated and Super-X divertor configuration in MAST-U.

From: Demonstration of Super-X divertor exhaust control for transient heat load management in compact fusion reactors

Fig. 5

a–j, The Elongated divertor in experiment number 47998 (a–e) and the Super-X divertor in experiment number 48001 (f–j). a,f, Fulcher-band-filtered MWI44 image with 3D model wireframe overlay (white lines). The green box indicates the region where the emissions front-tracking algorithm51 is active; the divertor leg pixels (orange dots) are detected through a 50% threshold on the maximum intensity (black circle) with the front position (red cross) taken as the divertor pixel nearest to the target. b,g, Front-tracking result transformed to the poloidal cross-section with the Equilibrium Fitting (EFIT++) magnetic equilibrium reconstruction (black) overlay, including flux contour lines (dashed). c,h, Time evolution of the poloidal distance-to-target Ltar and its applied reference. d,i, Time evolution of the D2 gas flow rate request by the controller. e,j, Time evolution of core line-integrated electron density.

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