Plasma Physics (Physics/ECE/NE 922) Seminars
Events on Monday, December 10th, 2018
- Towards steady-state fusion reactor with Wendelstein 7-X
- Time: 12:05 pm
- Place: 2241 chamberlin hall
- Speaker: Marcin Jakubowski, IPP Greifswald
- Abstract: Wendelstein 7-X, large superconducting stellarator, went into operation in 2015. With a 30 cubic meter volume, a superconducting coil system and steady state heating capabilities of up to 10 MW, it is built to demonstrate the benefits of optimized stellarators approaching those of a fusion power plant. One of the main aims of W7-X is to show that stellarators can operate with reactor relevant, steady state power and particles exhaust concept. Most recently, it operated with inertially cooled divertor and achieved very encouraging results. The heat deposition follows the strike line patterns expected from edge modelling with broad deposition profiles. Moreover, thanks to boronization, high plasma densities were achieved. This lead to remarkable results of complete divertor detachment across all 10 divertors. We see a reduction of peak power being reduced by a factor of 5 or larger and significantly enhanced neutral compression in the divertor volume. At the same time no degradation of core confinement was seen.