- By:
- Geiger, J.; Wolf, R.; BEIDLER, C.D.; Cardella, A; Chlechowitz, E; Erckmann, V.; Gantenbein, G; Hathiramani, D; Hirsch, M; Kasparek, W; Kisslinger, J; Koenig, R; Kornejew, P; Laqua, H; Lechte, C; Lore, Jeremy D; Lumsdaine, Arnold ; Maassberg, H.; Marushchenko, N; Michel, G; Otte, M; Peacock, A.; Sunn Pedersen, T; Thumm, M; Turkin, Yu.; Werner, A.; Zhang, D
- Journal Name:
- Plasma Physics and Controlled Fusion
- Page Number:
- 1-6
- Volume:
- 55
- Issue Number:
- 014006
- Publication Date:
- December 18, 2012
- View DOI Listing:
- https://doi.org/10.1088/0741-3335/55/1/014006
Abstract
The objective of Wendelstein 7-X is to demonstrate steady-state operation at β-values of up to 5%, at ion temperatures of several keV and plasma densities of up to 2×1020 m−3. The second operational phase foresees a fully steady-state high heat flux (HHF) divertor. Preparations are underway to cope with residual bootstrap currents, either by electron cyclotron current drive or by HHF protection elements. The main steady-state heating system is an electron cyclotron resonance heating facility. Various technical improvements of the gyrotrons have been implemented recently. They enable a reliable operation at the 1MW power level. Some of the technical issues preparing plasma diagnostics for steady-state operation are exemplified. This includes the protection against non-absorbed microwave radiation.
