Results 91 to 100 of about 5,819 (232)

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

Diagnostics Plan for the National Compact Stellarator Experiment [PDF]

, 2002
The National Compact Stellarator Experiment (NCSX) is a stellarator-tokamak hybrid seeking to combine the good confinement, high beta and moderate aspect ratio of the tokamak with the quasi-steady-state operation and good stability properties of the ...
Neilson, H., Fenstermacher, and M., Brown, T., Takahashi, H., Schilling, G., Zarnstorff, M., Cole, M., Johnson, D., Lazarus, E.   +8 more
core   +1 more source

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

H-mode transition and pedestal studies. [PDF]

Philos Trans A Math Phys Eng Sci, 2023
Andrew Y, Kim EJ.
europepmc   +1 more source

Advanced stellarator power plants

, 1994
The stellarator is a class of helical/toroidal magnetic fusion devices. Recent international progress in stellarator power plant conceptual design is reviewed and comparisons in the areas of physics, engineering, and economics are made with recent ...
Miller, R. L.
core  

Global fluid simulation of plasma turbulence in stellarators with the GBS code

Nuclear Fusion
The implementation of three-dimensional magnetic fields, such as the ones of stellarators, in the GBS code (Ricci et al 2012 Plasma Phys. Control. Fusion 54 124047; Giacomin et al 2022 J. Comput. Phys. 464 111294) is presented, and simulation results are
A.J. Coelho, J. Loizu, P. Ricci, Z. Tecchiolli   +3 more
doaj   +1 more source

Analytic representation of three-dimensional stellarator field [PDF]

, 1983
The stellarator configuration can be greatly simplified when toroidal harmonics are introduced. The toroidal function satisfies Laplace's equation and together with toroidal field and vertical field, a small-aspect-ratio stellarator can be constructed ...
Yoshikawa, S.
core  

First experimental observation of zonal flows in the optimized stellarator Wendelstein 7-X

Physical Review Research
In this work, we present the first experimental evidence of the presence of zonal flow (ZF) structures in the optimized stellarator Wendelstein 7-X.
D. Carralero, T. Estrada, J. M. García-Regaña, E. Sánchez, T. Windisch, A. Alonso, E. Maragkoudakis, C. Brandt, K. J. Brunner, C. Gallego-Castillo, P. Kornejew, K. Parks, K. Rahbarnia, H. Thienpondt   +13 more
doaj   +1 more source