Results 21 to 30 of about 1,911,396 (184)

An adjoint method for neoclassical stellarator optimization [PDF]

Journal of Plasma Physics, 2019
Stellarators are a promising route to steady-state fusion power. However, to achieve the required confinement, the magnetic geometry must be highly optimized. This optimization requires navigating high-dimensional spaces, often necessitating the use of gradient-based methods.
Elizabeth J. Paul, Ian G. Abel, Matt Landreman, William Dorland   +3 more
openaire   +2 more sources

Data for the paper "Stellarator optimization for good magnetic surfaces at the same time as quasisymmetry"

, 2021
Input and output files for computations in the publication "Stellarator optimization for good magnetic surfaces at the same time as ...
Landreman, Matt
core   +1 more source

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

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

Improving the stellarator through advances in plasma theory [PDF]

, 2022
Improvements to the stellarator concept can be realized through advancements in theoretical and computational plasma physics. Herein, recent advances are reported in the topical areas of: 1) improved energetic ion confinement, 2) the impact of three ...
Duff, J., Anderson, D., Kruger, T.G., Terry, P.W., Hegna, C., A. Bader, A. Ware, Anderson, D.T., Drevlak, M., McKinney, I., M.J. Pueschel, I.J. McKinney, Paul, E., Schmitt, J.S., Kruger, T., Faber, B., J.M. Duff, Ware, A.S., T. Bechtel, Bechtel, T.A., P.W. Terry, M.C. Zarnstorff, Landreman, M., Duff, J.M., Schmitt, J., C.C. Hegna, Bhattacharjee, A., Kotschenreuther, M., M. Drevlak, Zhu, C., Bader, A., Cole, M., Terry, P., D.T. Anderson, A. Bhattacharya, Pueschel, M.J., McKinney, I.J., Hudson, S., B.J. Faber, Zarnstorff, M., M. Landreman, Hudson, S.R., M. Kotschenreuther, M. Cole, T. Kruger, Pueschel, M., E. Paul, Hegna, C.C., Ware, A., Bechtel, T., S.R. Hudson, Faber, B.J., C. Zhu, T.A. Bechtel, T.G. Kruger, A.S. Ware, J.S. Schmitt, A. Bhattacharjee, M. Zarnstorff   +58 more
core   +1 more source

The universal instability in optimised stellarators

Journal of Plasma Physics, 2023
In tokamaks and neoclassically optimised stellarators, like Wendelstein 7-X (W7-X) and the Helically Symmetric Experiment, turbulent transport is expected to be the dominant transport mechanism. Among the electrostatic instabilities that drive turbulence, the trapped-electron mode (TEM) has been shown both analytically and in simulations to be absent ...
P. Costello, J.H.E. Proll, G.G. Plunk, M.J. Pueschel, J.A. Alcusón   +4 more
openaire   +5 more sources

The DESC Stellarator Code Suite Part III: Quasi-symmetry optimization [PDF]

, 2022
The DESC stellarator optimization code takes advantage of advanced numerical methods to search the full parameter space much faster than conventional tools.
Dudt, Daniel, Panici, Dario, Kolemen, Egemen, Conlin, Rory   +3 more
core   +1 more source

Stellarator hybrids [PDF]

, 1984
The present paper briefly reviews the subject of tokamak-stellarator and pinch-stellarator hybrids, and points to two interesting new possibilities: compact-torus-stellarators and mirror ...
Furth, H.P., H.P. Furth, C. Ludescher, Ludescher, C.   +3 more
core   +1 more source

An Enhanced Evaluation Method of Sequential Probability Ratio Test

Mathematical Problems in Engineering, Volume 2019, Issue 1, 2019., 2019
Accurate event detection has high priority in many technical applications. Events in acquired data series, their duration, and statistical parameters provide useful information about the observed system and about its current state. This information can be used for condition monitoring, state identification, and many kinds of forecasting as well.
Gabor Gardonyi, Gabor Por, Krisztian Samu, Akhil Garg   +3 more
wiley   +1 more source

Design of transverse magnetic field sweeping solenoids for 140 GHz mega‐watt gyrotrons

The Journal of Engineering, Volume 2018, Issue 14, Page 682-685, 2018., 2018
As the overlarge power density at the collector of mega‐watt (MW) gyrotrons limits the increase in their average output power and pulse width, transverse magnetic field sweeping solenoids (TMFSS) with periodical changing magnetic field have been designed for a 140 GHz MW gyrotron developed and tested at Beijing Vacuum Electronics Research Institute ...
Xu Zeng, Bentian Liu, Jinjun Feng
wiley   +1 more source