Results 61 to 70 of about 302,060 (167)

Bifurcated helical core equilibrium states in tokamaks

, 2013
Tokamaks with weak to moderate reversed central shear in which the minimum inverse rotational transform (safety factor) qmin is in the neighbourhood of unity can trigger bifurcated magnetohydrodynamic equilibrium states, one of which is similar to a ...
Sauter, O., Lazarus, E. A., Graves, J. P., Halpern, F., Tran, T.M., Duval, B.P., Lazarus, E.A., Labit, B., Evans, T.E., Luce, T. C., Evans, T. E., Halpern, F.D., Graves, J.P., Cooper, W.A., Hanson, J.M., Fenstermacher, M.E., Schmitz, O., Turnyanskiy, M. R., Ferron, J.R., Tran, T. M., Lütjens, H., Turco, F., Lao, L., Tobias, B.J., Hanson, J. M., Buttery, R., van Zeeland, M., Petty, C.C., Hollmann, E.M., Reimerdes, H., Turnbull, A.D., Luce, T.C., Chapman, I. T., Pfefferlé, D., Fenstermacher, M. E., Luetjens, H., Halpern, F. D., Ferron, J. R., Brunetti, D., Petty, C. C., Fenstermacher, M., Turnbull, A. D., Chapman, I.T., Cooper, W. A., Coda, S., Hollmann, E. M., Pochelon, A., Duval, B. P., Turnyanskiy, M.R., Tobias, B. J., Lanctot, M.J., Lanctot, M. J.   +51 more
core   +1 more source

On the Behavior of Two C1 Finite Elements Versus Anisotropic Diffusion

International Journal for Numerical Methods in Fluids, Volume 97, Issue 12, Page 1541-1557, December 2025.
Bi‐cubic Hemite‐Bézier and reduced cubic Hsieh‐Clough‐Tocher finite elements, of class C1, are compared for the solution of a highly anisotropic diffusion equation. They are tested numerically for various ratios of the diffusion coefficients on different meshes, even aligned with the anisotropy.
Blaise Faugeras, Hervé Guillard, Boniface Nkonga, Francesca Rapetti   +3 more
wiley   +1 more source

The Solar Wind Interaction With an Orbiting Venus

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Studies of the large‐scale interaction of the solar wind with planets have often been considered along the line of the sun to the planet, neglecting the planet's orbital motion. This paper describes a new refinement in the long history of Venus simulations, the addition of the planet's orbital motion.
Stephen H. Brecht, Stephen A. Ledvina
wiley   +1 more source

Hybrid hydrogen-electricity production using spherical tokamaks: a cost-driver sensitivity study and techno-economic analysis

Nuclear Fusion
Hybrid fusion power plants, which produce both hydrogen and electricity, are proposed as a way to decarbonise the fossil-fuel-dominated primary energy market and improve plant economics.
J. Hidalgo-Salaverri, T. Griffiths, Z. Xuereb Conti, P. Cano-Megias, R. Chacartegui, M. Bluck, J. Ayllon-Guerola, A. Mancini, M. Garcia-Munoz, E. Viezzer   +9 more
doaj   +1 more source

A h‐Adaptivity Strategy for Hybridizable Discontinuous Galerkin (HDG) Simulations of Fluid Transport Models in Tokamak Plasma

International Journal for Numerical Methods in Engineering, Volume 126, Issue 17, 15 September 2025.
ABSTRACT The highly anisotropic, multi‐scale nature of fusion plasma simulations in tokamaks, combined with the complexity in the geometries of plasma‐facing components and magnetic equilibrium, challenges numerical schemes. They therefore require the development of advanced numerical techniques to enhance computational efficiency and enable codes to ...
Marcello Capasso, Ivan Kudashev, Frédéric Schwander, Éric Serre   +3 more
wiley   +1 more source

The prospects for electron Bernstein wave heating of spherical tokamaks

, 2000
Electron Bernstein waves are analyzed as possible candidates for heating spherical tokamaks. An inhomogeneous plane slab model of the plasma with a sheared magnetic field is used to calculate the linear conversion of the ordinary mode (O-mode) to the ...
C. N. Lashmore-Davies, Cairns, Robert Alan, Lashmore-Davies, CN, R. A. Cairns   +3 more
core   +1 more source

Measurements of Auroral Plasma Properties Using Low‐Cost, Mobile, Ground‐Based Detectors

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract An expedition to Fairbanks, AK, was undertaken to study the aurora during the peak of solar cycle 25. Low‐cost diagnostics were developed to enable ground‐based measurements of ionospheric plasma parameters and auroral phenomena, namely a compact spectrometer and a high‐resolution all‐sky camera with 2‐axis magnetometer. Observations were made
S. Mackie, J. Rivera, T. Evans, J. L. Ball, S. Dannhoff, J. Heinzel, J. Van de Lindt, S. Moroch   +7 more
wiley   +1 more source

The impact of E × B shear on microtearing based transport in spherical tokamaks

Nuclear Fusion
Electromagnetic microtearing modes (MTMs) have been observed in many different spherical tokamak (ST) regimes. Understanding how these and other electromagnetic modes nonlinearly saturate is likely critical in understanding the confinement of a high β ST.
B.S. Patel, M.R. Hardman, D. Kennedy, M. Giacomin, D. Dickinson, C.M. Roach   +5 more
doaj   +1 more source

Fast and Invertible Simplicial Approximation of Magnetic‐Following Interpolation for Visualizing Fusion Plasma Simulation Data

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract We introduce a fast and invertible approximation for fusion plasma simulation data represented as 2D planar meshes with connectivities approximating magnetic field lines along the toroidal dimension in deformed 3D toroidal spaces. Scientific variables (e.g., density and temperature) in these fusion data are interpolated following a complex ...
Congrong Ren, Robert Hager, Randy Michael Churchill, Albert Mollén, Seung‐Hoe Ku, Choong‐Seock Chang, Hanqi Guo   +6 more
wiley   +1 more source

A survey of electron Bernstein wave heating and current drive potential for spherical tokamaks

, 2011
The electron Bernstein wave (EBW) is typically the only wave in the electron cyclotron (EC) range that can be applied in spherical tokamaks for heating and current drive (H&CD).
George Vahala, Joan Decker, Gary Taylor, Jakub Urban, Vladimir Shevchenko, Yves Peysson, Josef Preinhaelter, Linda Vahala   +7 more
core   +1 more source