2007/08/22 by B. Lipschultz, X. Bonnin, G. Counsell +61 · 6 citations
Physics and Astronomy · Materials Science · Engineering · #Magnetic confinement fusion research #Fusion materials and technologies #Superconducting Materials and Applications
paper · doi:10.1088/0029-5515/47/9/016
Abstract: The work of the ITPA SOL/divertor group is reviewed and implications for ITER discussed. Studies of near SOL gradients have revealed a connection to underlying turbulence models. Analysis of a multi-machine database shows that parallel conduction gradients near the separatrix scale as major radius. New SOL measurements have implicated low-field side transport as driving parallel flows to the inboard side. The high-n nature of ELMs has been elucidated and new measurements have determined that they carry ~10-20 % of the ELM energy to the far SOL with implications for ITER limiters and the upper divertor. Analysis of ELM measurements imply that the ELM continuously loses energy as it travels across the SOL – larger gaps should reduce surface loads. The predicted divertor power loads for ITER disruptions has been reduced as a result of finding that the divertor footprint broadens during the thermal quench and that the plasma can lose up to 80 % of