Results 61 to 70 of about 12,695 (229)

Enhanced transport in tokamaks due to toroidal ripple [PDF]

, 1980
A method for evaluating transport in non-symmetric systems is developed and applied to a previously unstudied ripple collisionality regime of tokamaks. This collisionality regime, the ripple plateau, is the regime of primary importance both for present ...
A.H. Boozer, Boozer, A. H., Allen H. Boozer   +2 more
core   +1 more source

Nonlinear Alfvén instability simulation and EP transport for ITER reversed shear (steady-state) and monotonic q-profile regimes

Nuclear Fusion
The nonlinear evolution and dynamics of energetic particle (EP) driven instabilities in both steady-state (reversed shear q-profile) and monotonic q-profile regimes of ITER are examined using the global gyro-Landau closure model FAR3d.
D.A. Spong, Y. Ghai, J. Varela, L. Garcia   +3 more
doaj   +1 more source

On the Description of Turbulent Transport in Magnetic Confinement Systems

Physics
We show how a source-aware fluid closure framework for turbulent transport performs well on the confinement timescale in magnetically confined plasmas.
Jan Weiland, Tariq Rafiq
doaj   +1 more source

Fluctuating Interfaces in Barotropic Beta‐Plane Turbulence

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Zonal jets manifest themselves as bands with sharp interfaces in the vorticity configuration. We develop an algorithm to track these fluctuating vorticity interfaces and systematically investigate their characteristic spatio‐temporal behaviors.
Sandip Sahoo, Samriddhi Sankar Ray
wiley   +1 more source

GKFieldFlow: a spatio-temporal neural surrogate for nonlinear gyrokinetic turbulence

Nuclear Fusion
We present GKFieldFlow , a novel three-dimensional autoregressive deep learning surrogate model for the saturated state of nonlinear gyrokinetic (GK) turbulence.
Arash Ashourvan
doaj   +1 more source

Auroral Signatures of Ballooning Instability and Plasmoid Formation Processes in the Near‐Earth Magnetotail

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The nonlinear development of ballooning instability and the subsequently induced plasmoid formation in the near‐Earth magnetotail demonstrated in MHD simulations has been proposed as a potential trigger mechanism for substorm onset over the past decade, and their connections to the in situ satellite and ground all‐sky auroral optical ...
Ping Zhu, Jun Liang, Jiaxing Liu, Sui Wan, Eric Donovan   +4 more
wiley   +1 more source

Axisymmetric perturbations and vertical displacement oscillatory modes driven by fast ions in tokamak plasmas

Nuclear Fusion
Recent progress on the theory and numerical simulations of vertical displacement oscillatory modes (VDOM) in tokamak plasmas is reported. VDOM are driven unstable by energetic particles and can have an impact on plasma disruptions, plasma edge stability ...
F. Porcelli, D. Banerjee, S. Cavallero, T. Barberis, F. Qiu, A. Yolbarsop, L.-G. Eriksson, C.C. Kim   +7 more
doaj   +1 more source

Data readiness pipeline patterns for scientific AI at scale: Insights from climate, fusion, life sciences, and materials

AI Magazine, Volume 47, Issue 1, Spring 2026.
Abstract This article examines how data readiness for AI principles apply to large scientific datasets used to train foundation models. We analyze archetypal workflows across four representative domains—climate, nuclear fusion, life sciences, and materials—to identify common preprocessing patterns and domain‐specific constraints.
Wesley Brewer, Patrick Widener, Valentine Anantharaj, Feiyi Wang, Tom Beck, Arjun Shankar, Sarp Oral   +6 more
wiley   +1 more source

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

Orbit-space sensitivity of two-step reaction gamma-ray spectroscopy

Nuclear Fusion
We calculate the orbit-space sensitivity of two-step reaction gamma-ray spectroscopy diagnostics in toroidally symmetric magnetic equilibria, using the reaction between alpha particles and beryllium-9 as an example.
A. Valentini, H. Järleblad, M. Nocente, J. Eriksson, S. Fugazza, O. Hyvärinen, V. Kiptily, D. Moseev, B.C.G. Reman, M. Rud, A. Snicker, L. Stagner, M. Salewski, JET Contributors   +13 more
doaj   +1 more source