Results 11 to 20 of about 2,047 (170)

Enhancing stellarator accessibility through port size optimization

Nuclear Fusion
Access to the plasma chamber in a stellarator reactor is essential for maintenance and diagnostics. However, the complex geometry of stellarator coils, often characterized by their strong twisting, can severely limit the space available for access ports.
A. Baillod, E.J. Paul, T. Elder, J.M. Halpern   +3 more
doaj   +3 more sources

Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment

Nuclear Fusion
The Columbia Stellarator eXperiment (CSX), currently being designed at Columbia University, aims to test theoretical predictions related to QA plasma behavior, and to pioneer the construction of an optimized stellarator using three-dimensional, non ...
A. Baillod, E.J. Paul, G. Rawlinson, M. Haque, S.W. Freiberger, S. Thapa   +5 more
doaj   +3 more sources

Optimizing Stellarators for Turbulent Transport [PDF]

Physical Review Letters, 2010
Up to now, the term "transport-optimized" stellarators has meant optimized to minimize neoclassical transport, while the task of also mitigating turbulent transport, usually the dominant transport channel in such designs, has not been addressed, due to the complexity of plasma turbulence in stellarators.
Mynick, H., Pomphrey, N., Xanthopoulos, P.   +2 more
openaire   +6 more sources

Uncertainty quantification in three‐dimensional magnetohydrodynamic equilibrium reconstruction via surrogate‐assisted Bayesian inference

Contributions to Plasma Physics, Volume 63, Issue 5-6, June-July 2023., 2023
Abstract In three‐dimensional (3D) equilibrium, reconstruction defining parameters of an ideal magneto‐hydrodynamic equilibrium are inferred from a set of plasma diagnostic measurements. For the reconstructed parameters, various forms of uncertainty estimates exist within common 3D reconstruction frameworks.
Robert Köberl, Udo von Toussaint, Hans‐Joachim Bungartz, Jonathan Schilling, Christopher G. Albert, W7‐X Team   +5 more
wiley   +1 more source

Integration of kinetic ions in a three‐dimensional Monte‐Carlo neutral transport code

Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020
Abstract Charged particles of species different from the major constituents of a plasma might not reach local thermodynamic equilibrium during their lifespan. Such low collisional ions render the often‐used fluid description, assuming Maxwellian velocity distribution, as insufficient. Hence, kinetic treatment of such minorities becomes inevitable.
Friedrich Schluck
wiley   +1 more source

Robust stellarator optimization via flat mirror magnetic fields

Nuclear Fusion, 2023
Stellarator magnetic configurations need to be optimized in order to meet all the required properties of a fusion reactor. In this work, it is shown that a flat-mirror quasi-isodynamic (QI) configuration (i.e.
J.L. Velasco, I. Calvo, E. Sánchez, F.I. Parra   +3 more
doaj   +1 more source

Perturbing an axisymmetric magnetic equilibrium to obtain a quasi-axisymmetric stellarator

, 2020
It is demonstrated that finite-pressure, approximately quasi-axisymmetric stellarator equilibria can be directly constructed (without numerical optimization) via perturbations of given axisymmetric equilibria.
Plunk, G. G.
core   +1 more source

Properties of a new quasi-axisymmetric configuration [PDF]

, 2018
A novel, compact, quasi-axisymmetric configuration is presented which exhibits low fast-particle losses and is stable to ideal MHD instabilities. The design has fast-particle loss rates below 8\% for flux surfaces within the half-radius, and is shown to ...
Beidler, C. D., Drevlak, M., Helander, P., Henneberg, S. A., Loizu, J., Nührenberg, C., Turkin, Y.   +6 more
core   +2 more sources

Global stochastic optimization of stellarator coil configurations

Journal of Plasma Physics, 2022
In the construction of a stellarator, the manufacturing and assembling of the coil system is a dominant cost. These coils need to satisfy strict engineering tolerances, and if those are not met the project could be cancelled as in the case of the National Compact Stellarator Experiment (NCSX) project (R.L.
Silke Glas, Misha Padidar, Ariel Kellison, David Bindel   +3 more
openaire   +2 more sources

Optimizing stellarators for large flows [PDF]

Plasma Physics and Controlled Fusion, 2014
Plasma flow is damped in stellarators because they are not intrinsically ambipolar, unlike tokamaks, in which the flux-surface averaged radial electric current vanishes for any value of the radial electric field. Only quasisymmetric stellarators are intrinsically ambipolar, but exact quasisymmetry is impossible to achieve in non-axisymmetric toroidal ...
Calvo, Iván, Parra, Felix I, Alonso, J Arturo, Velasco, José Luis   +3 more
openaire   +2 more sources