Results 61 to 70 of about 2,079 (226)

On Stellar Rotation.

The Astrophysical Journal, 1942
Not ...
openaire   +1 more source

MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators

, 1999
The MHD stability of quasi-axisymmetric compact stellarators is investigated. It is shown that bootstrap current driven external kink modes can be stabilized by a combination of edge magnetic shear and appropriate 3D plasma boundary shaping while ...
Fu, G. Y., al, et, Kessel, C., Redi, M. H., Ku, L. P., Pomphrey, N.   +5 more
core   +1 more source

Boundary turbulence simulations of the optimized HSX stellarator and comparison with experiments

Nuclear Fusion
We present the first-ever full- $f$ , three-dimensional, two-fluid simulation of plasma turbulence based on the drift-reduced Braginskii equations in the optimized Helically Symmetric eXperiment (HSX) stellarator in its quasi-helical configuration.
Z. Tecchiolli, L. Da Silva, J. Loizu, D. Boeyaert, A. Wolfmeister, W. Guttenfelder, P. Ricci, N. Nikulsin, B. De Lucca, D. Mancini   +9 more
doaj   +1 more source

Instabilities and turbulence in stellarators from the perspective of global codes

Nuclear Fusion, 2023
In this work, a comparison of the global gyrokinetic codes EUTERPE and GENE-3D in stellarator configurations of the Large Helical Device (LHD) and the Wendelstein 7-X (W7-X) is carried out.
E. Sánchez, A. Bañón Navarro, F. Wilms, M. Borchardt, R. Kleiber, F. Jenko   +5 more
doaj   +1 more source

MHD-Theoretical Aspects of Stellarators

Development and results of the MHD description of stellarators over the past half-decade are reviewed. Major events were the acceleration of convergence of those equilibrium codes which assume nested surfaces, the advent of equilibrium codes which do not
Nuhrenberg, J., Hayashi, T., Schwenn, U., Monticello, D. A., Reiman, A. H., Schwab, C., Merkel, P., Cooper, A., Hirshman, S. P., Johnson, J. L.   +9 more
core   +1 more source

Equilibrium pressure limits in stellarators

, 2023
This thesis delves into the potential of magnetic fusion energy, and in particular focuses on the stellarator concept. Stellarators use external coils to produce 3-dimensional (3D) magnetic fields that confine a thermonuclear plasma in a topologically ...
Baillod, Antoine
core   +1 more source

Multiscale turbulence in stellarators

Nuclear Fusion
We present the first gyrokinetic simulations of multiscale turbulence in a stellarator, using the magnetic geometry of Wendelstein 7-X (W7-X) and experimentally relevant parameters. A broad range of scenarios is explored, including regimes where electron-
G. Merlo, A. Bañón Navarro, T. Görler, F. Jenko, F. Wilms   +4 more
doaj   +1 more source

Designs Studies of Low-Aspect Ratio Quasi-Omnigenous Stellarators

, 2009
Significant progress has been made in the development of new modest-size compact stellarator devices that could test optimization principles for the design of a more attractive reactor. These are 3 and 4 field period low-aspect-ratio quasi-omnigenous (QO)
Batchelor, D.B.; Carreras, B.A.; Hirshman, S.P.; Lynch, V.E.; Sanchez, R.; Spong, D.A.; Whitson, J.C.
core  

Filament simulations for stellarators; a review of recent progress

Frontiers in Physics
A review of recent advances in simulations of turbulent filaments with relevance to stellarators is presented. Progress in performing global edge turbulence simulations is discussed as well as results from seeded filament simulations with applications to
Brendan Shanahan
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Stellar atmospheres

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
Puls, Joachim, Herrero, Artemio, Prieto, Carlos Allende   +2 more
openaire   +2 more sources