4 papers
SPECTRE: A robust solver for 3D equilibria with arbitrary topology
E. Balkovic, J. Loizu, E. Lanti +6
We present SPECTRE, a new equilibrium code based on the Multi-Region relaxed MHD model for robustly calculating 3D equilibria with general magnetic topology, allowing for flux surf…
Polaris: a flexible stellarator demonstration experiment with simple modular coils
Simon P. H. Vincent, Joaquim Loizu, Matthieu Toussaint +14
We present the design, construction, and first plasma experiments of Polaris, a new small-scale stellarator experiment (major radius R ~ 0.4 m) located at the Swiss Plasma Center.…
Direct prediction of saturated neoclassical tearing modes in slab using an equilibrium approach
Erol Balkovic, Joaquim Loizu, Jonathan P. Graves +2
We demonstrate for the first time that the nonlinear saturation of neoclassical tearing modes (NTMs) can be found directly using a variational principle based on Taylor relaxation,…
Efficient single-stage optimization of islands in finite- stellarator equilibria
Christopher Berg Smiet, Joaquim Loizu, Erol Balkovic +1
We present the first single-stage optimization of islands in finite- stellarator equilibria. Stellarator optimization is traditionally performed as a two-stage process; in the f…