Max-Planck-Institut für Plasmaphysik

Sep 27, 2024 | link.aps.org | Yao Zhou |Shanghai Jiao Tong |K. Aleynikova |Max-Planck-Institut für Plasmaphysik

To examine the robustness of the designed 5% β limit for high-performance operation in the W7-X stellarator, we undertake nonlinear magnetohydrodynamic (MHD) simulations of pressure-driven instabilities using the m3d-c1 code. Consistent with linear analyses, ideal ballooning instabilities occur as β exceeds 5% in the standard configuration.

Jun 20, 2024 | pubs.aip.org | Max-Planck-Institut für Plasmaphysik |Brian Haines |P. Rodriguez-Fernandez

The simulation implements the same flux-tube model as Refs. 35 and 38, except that the magnetic shear is turned off. Magnetic shear is usually very important, especially in the pedestal. It also affects FLR stabilization and thus the wave number spectrum. However, the main focus of this work is to demonstrate how the enhanced confinement regimes can arise even in such systems with simplified physics and geometry.

May 6, 2024 | pubs.aip.org | Max-Planck-Institut für Plasmaphysik |Technische Universität Berlin |Samuel E. Wurzel |S. X. Hu

The development of high performance (HP) plasma scenarios, in particular with respect to a maximization of the fusion triple product n e T i τ E under steady-state plasma conditions,1 is one of the main important and also most challenging goals of the magnetically confined fusion device Wendelstein 7-X (W7-X).2 Despite significant achievements like the proof of neoclassical optimization,3 a transient high fusion triple product,4 or steady-state plasma conditions with complete detachment,5,6...

Jun 14, 2023 | aaltodoc.aalto.fi | Max-Planck-Institut für Plasmaphysik

Abstract:In Wendelstein 7-X (W7-X), a new ion cyclotron resonance heating (ICRH) antenna will be commissioned during the operational campaign OP2.1. The antenna will have to sustain power loads not only from thermal plasma and radiation but also fast ions. Predictive simulations of fast-ion power loads to the antenna components are therefore important to establish safe operational limits.