Hannover 2010 – wissenschaftliches Programm
P 22.2: Poster
Donnerstag, 11. März 2010, 16:00–18:00, Lichthof
Simulation and analytical analysis of 3D plasma edge region regarding toroidal symmetry breaking block limiters — •Felix Hasenbeck1,2, Heinke Frerichs3, Detlev Reiter2, and Yühe Feng4 — 1RWTH Aachen University, Aachen — 2Institut für Energieforschung 4 - Plasmaphysik, Forschungszentrum Jülich — 3German Research School for Simulation Sciences, Jülich — 4Max-Planck-Institut für Plasmaphysik, Greifswald
It is foreseen that ITER will employ a number of block limiters during start-up and ramp-down phases. Due to the loss of toroidal symmetry fully 3D transport simulations have been done to determine plasma characteristics in the edge region. It was shown  that calculations of heat loads and surface temperatures based on an approximate analytical plasma description mostly complied with simulation results.
In order to capture all physical details of these 3D configurations the Monte Carlo code EMC3-EIRENE has been extended to enable flexible treatment of block limiters. A connection length atlas for 3D limiters is being set up and the effects of different forms and positions on the field line structure and the plasma transport have been studied. Based on this work a comparison of the simulation results with predictions of semi-analytical models will be presented as well as corrections to increase the accuracy of these reduced models. In this context the magnetic topology presented in  for a particular ITER reference case could be confirmed.
 Kobayashi, M. et al, Nucl. Fusion, 47 (2007), 61-73