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(ITERP1/12) Edge Database Analysis for Extrapolation to ITER

   
M. Shimada ¹, G. Janeschitz ², R. D. Stambaugh ³, D. E. Post ², Y. Igitkhanov ², G. F. Matthews ⁴, G. W. Pacher ⁵, H. D. Pacher ⁶, M. Sugihara ², A. Hubbard ⁷, Y. Kamada ¹, B. LaBombard ⁷, A. W. Leonard ³, A. Loarte ⁶, K. McCormick ⁸, T. H. Osborne ³, G. D. Porter ⁹, W. Suttrop ⁸, ITER Divertor Modeling and Database Expert Group, ITER Divertor Physics Expert Group
 
¹ Japan Atomic Energy Research Institute, Naka-machi, Ibaraki-ken, 311-0193 Japan
² ITER Joint Work Site, 85748 Garching, Germany
³ General Atomics, San Diego, CA, U.S.A.
⁴ JET Joint Undertaking, Abingdon, U.K.
⁵ CCFM Varennes, Canada
⁶ The NET Team, 85748 Garching, Germany
⁷ MIT Plasma Science and Fusion Center, Cambridge, MA, U.S.A.
⁸ Max Planck Institut für Plasmaphysik, 85748 Garching, Germany
⁹ Lawrence Livermore National Laboratory, Livermore, California, U.S.A.

Abstract
An edge database  has been archived to facilitate cross-machine comparisons of SOL and edge pedestal  characteristics, and to enable comparison with theoretical models with an aim to extrapolate to ITER . The SOL decay lengths of power, density and temperature become broader for increasing density and $\rm q_{95}$. The power decay length is predicted to be 1.4-3.5 cm (L-mode ) and 1.4-2.7 cm (H-mode ) at the midplane in ITER. Analysis of Type I ELMs  suggests that each giant ELM on ITER would exceed the ablation threshold of the divertor plates. Theoretical models are proposed for the H-mode transition, for Type I and Type III ELMs and are compared with the edge pedestal database.

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