Results 61 to 70 of about 85,365 (260)
Dust remobilization from rough planar surfaces in tokamak steady-state plasmas
Nuclear Materials and Energy, 2018 The ability of tungsten (W) dust to be remobilized from rough tokamak plasma-facing surfaces is investigated in this study. Atomic Force Microscopy is used to evaluate the adhesion force distribution between W spheroids of ∼1−10 µm radius and a rough W ...
A. Autricque +7 more
doaj +1 more source
, 1985 A small steady-state tokamak capable of producing power in the 100 to 300 MWe range and relying on electron cyclotron RF heating (ECH) for both heating and current drive is described. Working in the first MHD stability regime for tokamaks, the approach adheres to the recently discovered maximum beta limit. An appropriate figure of merit is the ratio of
Firestone, M. A. +2 more
openaire +3 more sources
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 +6 more
wiley +1 more source
Advanced Materials Interfaces, Volume 12, Issue 10, May 19, 2025.A novel and efficient method is explored to synthesize 1D single‐crystal sub‐stoichiometric WnO3n‐2 (n = 25) nanowire bundles. The approach utilizes selective low‐energy He+ ion irradiation (27 eV) on Mo‐Ni doped WOx surface, achieving efficient catalyst‐free self‐organized growth of high aspect ratio nanowires at the temperature of 700 °C.
Maryna Bilokur +3 more
wiley +1 more source
Impurity transport and bulk ion flow in a mixed collisionality stellarator plasma
, 2017 The accumulation of impurities in the core of magnetically confined plasmas, resulting from standard collisional transport mechanisms, is a known threat to their performance as fusion energy sources.
Helander, Per +3 more
core +1 more source
Comparing Risks for Binomial Reliability Assurance Test Planning
Applied Stochastic Models in Business and Industry, Volume 41, Issue 3, May/June 2025.ABSTRACT Balancing consumer's and producer's risk is an important consideration when planning tests. Instead of focusing on finding a single best test plan, we introduce a general framework to systematically identify a set of binomial test plans by leveraging the inverse relationship between the two risks.
Hyoshin Kim, Alyson G. Wilson
wiley +1 more source
Asymptotic-preserving methods for an anisotropic model of electrical potential in a tokamak
, 2014 A 2D nonlinear model for the electrical potential in the edge plasma in a tokamak generates a stiff problem due to the low resistivity in the direction parallel to the magnetic field lines.
Angot, Philippe +2 more
core +3 more sources
, 1978 A tokamak configuration is proposed that permits the rapid replacement of a plasma discharge in a ''burn'' chamber by another one in a time scale much shorter than the elementary thermal time constant of the chamber first wall. With respect to the chamber, the effective duty cycle factor can thus be made arbitrarily close to unity minimizing the cyclic
openaire +2 more sources
Laser &Photonics Reviews, Volume 19, Issue 3, February 5, 2025.Femtosecond laser irradiation inside Al2O3‐SiO2 and ZrO2‐Al2O3‐SiO2 glasses can induce polarization‐controlled birefringent nanostructures, along with local precipitation of refractory nanocrystals like tetragonal ZrO2 or mullite. These structures yield a persisting positive index contrast with extraordinary thermal stability (>1600 °C), opening a ...
Imane Ktafi +8 more
wiley +1 more source
Ion‐Mediated Tearing and Kink Instabilities in the Earth's Magnetosphere: Hybrid‐Vlasov Simulations
Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.Abstract We explore the three‐dimensional structure of ion‐kinetic instabilities in a thin current layer using a hybrid‐Vlasov simulation of the Earth's magnetosphere. The simulation shows the simultaneous growth of tearing and kinking instabilities, which develop in the Sun‐Earth and dawn‐dusk directions, respectively, within the magnetotail current ...
I. Zaitsev +19 more
wiley +1 more source