158 citations · 2.3k across the 75 of their papers we have counts for
7 papers · 1 filter
Adjoint approach to calculating shape gradients for 3D magnetic confinement equilibria
Thomas Antonsen, Elizabeth J. Paul, Matt Landreman
The shape gradient quantifies the change in some figure of merit resulting from differential perturbations to a shape. Shape gradients can be applied to gradient-based optimization…
Direct construction of optimized stellarator shapes. II. Numerical quasisymmetric solutions
Matt Landreman, Wrick Sengupta, Gabriel G Plunk
Quasisymmetric stellarators are appealing intellectually and as fusion reactor candidates since the guiding center particle trajectories and neoclassical transport are isomorphic t…
Direct construction of optimized stellarator shapes. I. Theory in cylindrical coordinates
Matt Landreman, Wrick Sengupta
The confinement of guiding center trajectories in a stellarator is determined by the variation of the magnetic field strength in Boozer coordinates , but …
: a mixed implicit-explicit, delta-f gyrokinetic code for general magnetic field configurations
Michael Barnes, Felix Parra-Diaz, Matt Landreman
Here we present details of a mixed implicit-explicit numerical scheme for the solution of the gyrokinetic-Poisson system of equations in the local limit. This scheme has been imple…
On-surface potential and radial electric field variations in electron root stellarator plasmas
J. M. García-Regaña, T. Estrada, I. Calvo +8
In the present work we report recent radial electric field measurements carried out with the Doppler reflectometry system in the TJ-II stellarator. The study focuses on the fact th…
Computing local sensitivity and tolerances for stellarator physics properties using shape gradients
Matt Landreman, Elizabeth J Paul
Tight tolerances have been a leading driver of cost in recent stellarator experiments, so improved definition and control of tolerances can have significant impact on progress in t…