Improvement in the simulation tools for heat distribution predictions and control of baffle and middle divertor loads in Wendelstein 7-X
oleh: Yu Gao, Yuhe Feng, Michael Endler, Marcin W. Jakubowski, Joachim Geiger, Sergey Bozhenkov, Aleix Puig Sitjes, Fabio Pisano, Chandra Prakash Dhard, Dirk Naujoks, Maciej Krychowiak, Matthias Otte, Ralf König, Daihong Zhang, Georg Schlisio, Uwe Wenzel, Thomas Sunn Pedersen, the W7-X Team
| Format: | Article |
|---|---|
| Diterbitkan: | IOP Publishing 2023-01-01 |
Deskripsi
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.