Improvement in the simulation tools for heat distribution predictions and control of baffle and middle divertor loads in Wendelstein 7-X

Nuclear Fushion

article

Yu Gao¹  Yuhe Feng¹  Michael Endler¹  Marcin W. Jakubowski¹  Joachim Geiger¹  Sergey Bozhenkov¹  Aleix Puig Sitjes¹  Fabio Pisano²  Chandra Prakash Dhard¹  Dirk Naujoks¹  Maciej Krychowiak¹  Matthias Otte¹  Ralf König¹  Daihong Zhang¹  Georg Schlisio¹  Uwe Wenzel¹  Thomas Sunn Pedersen¹  the W7-X Team¹ 

[1] Max-Planck-Institut für Plasmaphysik;Department of Electrical and Electronic Engineering, University of Cagliari

关键词: W7-X;    EMC3-Lite;    heat loads;    simulation;   

DOI  :  10.1088/1741-4326/acaf0e

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

In the first divertor campaign in Wendelstein 7-X (W7-X), unexpected significant heat loads were observed at particular plasma-facing components (e.g. baffle tiles and middle divertor part) which were not designed to receive high heat flux. In a prior investigation, it was concluded that the previous diffusive field line tracing (DFLT) model used for divertor design in W7-X cannot reproduce these loads, due to the missing physics in simulating the heat transport in the shaded flux tubes. To tackle this issue, two new efficient codes (DFLT_rev and EMC3-Lite) are introduced and validated against various experimental heat distributions in different magnetic configurations. The new tungsten baffle tiles have been designed with these codes and mounted in the machine, aiming for mitigated heat loads in the upcoming campaign.

【 授权许可】

Unknown