Results 71 to 80 of about 2,329 (224)

MHD-Theoretical Aspects of Stellarators

, 1993
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., Hirshman, S., Johnson, J., Monticello, D., Reiman, A.   +13 more
core   +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  

Global linear drift-wave eigenmode structures on flux surfaces in stellarators: ion temperature gradient mode

Nuclear Fusion
Turbulent transport greatly impacts the performance of stellarator magnetic confinement devices. While significant progress has been made on the numerical front, theoretical understanding of turbulence in stellarators is still lacking. In particular, due
Hongxuan Zhu, H. Chen, Z. Lin, A. Bhattacharjee   +3 more
doaj   +1 more source

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
doaj   +1 more source

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

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

Stellar populations

, 2013
This is a summary of my lectures during the 2011 IAC Winter School in Puerto de la Cruz. I give an introduction to the field of stellar populations in galaxies, and highlight some new results. Since the title of the Winter School was {\it Secular Evolution of Galaxies} I mostly concentrate on nearby galaxies, which are best suited to study this theme ...
openaire   +3 more sources

Confinement magnétique dans les stellarators : champs harmoniques et différentiation de forme

In this thesis, we consider shape differentiation problems for harmonic fields with applications to the study of magnetic confinement in stellarators.
Roussel, Robin
core   +2 more sources

TYPES OF QUASISYMMETRIC STELLARATORS

, 1992
The property investigation of possible types of quasisymmetric stellarators is the aim of the paper. As a result the quasisymmetry condition in the invariant form has been determined.
Isaev, Maxim Jurievich
core  

The residual flow in well-optimized stellarators [PDF]

The gyrokinetic theory of the residual flow, in the electrostatic limit, is revisited, with optimized stellarators in mind. We consider general initial conditions for the problem, and identify cases that lead to a non-zonal residual electrostatic ...
Plunk, G. G., Helander, P., Plunk, G. ; https://orcid.org/, Helander, P. ; https://orcid.org/   +3 more
core   +1 more source