Results 41 to 50 of about 922 (184)

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

Observation of modes in the sub-cyclotronic range of frequencies in JET

Nuclear Fusion
The excitation of modes in the JET tokamak in the sub-cyclotronic range of frequencies (frequencies comprised between the Alfvén frequency and the cyclotron frequency) is for the first time reported.
F. Nabais, D. Borba, R. Coelho, J. Ferreira, A. Figueiredo, P. Rodrigues, S.E. Sharapov, JET Contributors   +7 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

Impact of poloidal convective cells on momentum flux in tokamaks

New Journal of Physics, 2017
Radial fluxes of parallel momentum due to $E\times B$ and magnetic drifts are shown to be correlated in tokamak plasmas. This correlation comes from the onset of poloidal convective cells generated by turbulence.
X Garbet, Y Asahi, P Donnel, C Ehrlacher, G Dif-Pradalier, P Ghendrih, V Grandgirard, Y Sarazin   +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

Quantum Iterative Methods for Solving Differential Equations with Application to Computational Fluid Dynamics

Advanced Quantum Technologies, Volume 9, Issue 2, February 2026.
Quantum algorithms for differential equations are developed with applications in computational fluid dynamics. The methods follow an iterative simulation framework, implementing Jacobi and Gauss–Seidel schemes on quantum registers through linear combinations of unitaries.
Chelsea A. Williams, Antonio A. Gentile, Vincent E. Elfving, Daniel Berger, Oleksandr Kyriienko   +4 more
wiley   +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 impact of temperature gradient flattening and system size on heat transport in microtearing turbulence

Nuclear Fusion, 2023
Microtearing instability is one of the major sources of turbulent transport in high- β tokamaks. These modes lead to very localized transport at low-order rational magnetic field lines, and we show that flattening of the local electron temperature ...
Ajay C.J., B.F. McMillan, M.J. Pueschel
doaj   +1 more source

Relation between porosity‐based and crystal‐based femtosecond laser‐induced nanogratings in oxide glasses

International Journal of Applied Glass Science, Volume 17, Issue 1, January 2026.
Abstract Femtosecond laser irradiation in glass, under controlled conditions, can induce two types of nanogratings (NG): porous nanogratings (pNG) and crystal/glass nanogratings (cNG). While most glasses exhibit only one type, binary aluminosilicate glasses have shown both types of NG.
Imane Ktafi, Maxime Cavillon, Matthieu Lancry, Bertrand Poumellec   +3 more
wiley   +1 more source

Spontaneous formation of a transport barrier in helium plasma in a tokamak with circular configuration

Nuclear Fusion, 2023
We report on the first experimental observation of a spontaneously formed transport barrier in the tokamak with a circular configuration in helium plasmas.
P. Macha, J. Adamek, J. Seidl, J. Stockel, V. Svoboda, G. Van Oost, L. Lobko, J. Krbec   +7 more
doaj   +1 more source