Results 81 to 90 of about 10,346 (211)

The topology of non-resonant stellarator divertors

Nuclear Fusion
We apply topological methods to better understand how the magnetic field in the stellarator edge can be diverted away from the confined region. Our primary method is calculating the winding numbers of closed contours, which gives information on the ...
Robert Davies, Christopher B. Smiet, Alkesh Punjabi, Allen H. Boozer, Sophia A. Henneberg   +4 more
doaj   +1 more source

Statistical Analysis of Plasma Dynamics in Gyrokinetic Simulations of Stellarator Turbulence. [PDF]

Entropy (Basel), 2023
Papadopoulos AD, Anderson J, Kim EJ, Mavridis M, Isliker H.   +4 more
europepmc   +1 more source

Direct construction of low-aspect-ratio advanced stellarators via asymptotic expansion

Nuclear Fusion
Advanced stellarators are promising candidates for fusion reactors due to their intrinsic steady-state operation capability and excellent plasma confinement properties.
Ke Liu, Zhexuan Zheng, Jianlin Peng, Caoxiang Zhu   +3 more
doaj   +1 more source

Stellar Prominences [PDF]

Symposium - International Astronomical Union, 1996
I review recent observational and theoretical progress in the study of condensations of cool material trapped in the coronae of rapidly rotating stars. Such condensations were discovered over a decade ago, producing transient moving absorption features in the optical Balmerseries lines.
openaire   +2 more sources

Trapped electron mode in a quasi-isodynamic stellarator

Nuclear Fusion
Global gyrokinetic simulations find a strongly unstable trapped electron mode excited by a density gradient in a quasi-isodynamic stellarator. The eigenmode structure localizes on the inner side of the torus with an unfavorable magnetic curvature and ...
Javier H. Nicolau, Xishuo Wei, Pengfei Liu, Gyungjin Choi, Zhihong Lin   +4 more
doaj   +1 more source

ParaStell: parametric modeling and neutronics support for stellarator fusion power plants

Frontiers in Nuclear Engineering
The three-dimensional variation inherent to stellarator geometries and fusion sources motivates three-dimensional modeling to obtain accurate results from computational modeling in support of design and analysis of first wall, blanket, and shield (FWBS ...
Connor Moreno, Aaron Bader, Aaron Bader, Paul Wilson   +3 more
doaj   +1 more source

On a stellar structure for a stellar manifold

, 2002
It is well known that a compact two dimensional surface is homeomorphic to a polygon with the edges identified in pairs. This paper not only presents a new proof of this statement but also generalizes it for any connected n-dimensional stellar manifold with a finite number of vertices.
openaire   +2 more sources

Stellar Oscillons

Annals of the New York Academy of Sciences, 1998
ABSTRACT: We study the weakly nonlinear evolution of acoustic instability of a plane‐parallel polytrope with thermal dissipation in the form of Newton's law of cooling. The most unstable horizontal wavenumbers form a band around zero and this permits the development of a nonlinear pattern theory leading to a complex Ginzburg‐Landau equation (CGLE ...
Umurhan, O. M., Tao, L., Spiegel, E. A.
openaire   +3 more sources

Coil optimization methods for a planar coil stellarator

Nuclear Fusion
The planar coil stellarator design is a novel approach to producing the confining magnetic field of a stellarator plasma. The work presented here details the optimization of the two types of planar coils that are used in the planar coil design: the ...
T.G. Kruger, M.F. Martin, D.A. Gates, the Thea Energy Team   +3 more
doaj   +1 more source

Precise stellarator quasi-symmetry can be achieved with electromagnetic coils. [PDF]

Proc Natl Acad Sci U S A, 2022
Wechsung F, Landreman M, Giuliani A, Cerfon A, Stadler G.   +4 more
europepmc   +1 more source