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physics.plasm-ph2024
Collisionless zonal-flow dynamics in quasisymmetric stellarators
Hongxuan Zhu, Z. Lin, A. Bhattacharjee
The linear collisionless plasma response to a zonal-density perturbation in quasisymmetric stellarators is studied, including the geodesic-acoustic-mode oscillations and the Rosenb…
physics.plasm-ph2024
An asymptotic Grad-Shafranov equation for quasisymmetric stellarators
Nikita Nikulsin, Wrick Sengupta, Rogerio Jorge +1
A first-order model is derived for quasisymmetric stellarators where the vacuum field due to coils is dominant, but plasma-current-induced terms are not negligible and can contribu…
physics.plasm-ph2024
Exploration of the parameter space of quasisymmetric stellarator vacuum fields through adjoint optimisation
Richard Nies, Elizabeth J. Paul, Dario Panici +2
Optimising stellarators for quasisymmetry leads to strongly reduced collisional transport and energetic particle losses compared to unoptimised configurations. Though stellarators…