Results 61 to 70 of about 3,492 (198)

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

Kinetic-ballooning-limited pedestals in spherical tokamak plasmas

Nuclear Fusion
A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high- β tokamak NSTX.
J.F. Parisi, W. Guttenfelder, A.O. Nelson, R. Gaur, A. Kleiner, M. Lampert, G. Avdeeva, J.W. Berkery, C. Clauser, M. Curie, A. Diallo, W. Dorland, S.M. Kaye, J. McClenaghan, F.I. Parra   +14 more
doaj   +1 more source

Kinetic simulations of X-B and O-X-B mode conversion

, 2015
We have performed fully-kinetic simulations of X-B and O-X-B mode conversion in one and two dimensional setups using the PIC code EPOCH. We have recovered the linear dispersion relation for electron Bernstein waves by employing relatively low amplitude ...
Arefiev, A. V., Holzhauer, E., Köhn, A., Shevchenko, V. F., Toit, E. J. Du, Vann, R. G. L.   +5 more
core   +1 more source

Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation

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, Matt Thompson, Matthew Arnold, Cormac Corr   +3 more
wiley   +1 more source

Parsec-scale obscuring accretion disk with large scale magnetic field in AGN

, 2017
Magnetic field dragged from the galactic disk along with inflowing gas can provide vertical support to the geometrically and optically thick pc-scale torus in AGN. Using the Soloviev solution initially developed for Tokamaks we derive an analytical model
Dorodnitsyn, Anton, Kallman, Tim
core   +1 more source

A New Approach Toward Extreme Thermal Stability of Femtosecond Laser Induced Modifications in Glasses

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, Jing Kong, Maxime Cavillon, Bertrand Poumellec, Maureen Yembele, Renaud Valois, Mathieu Allix, Gang‐Ding Peng, Matthieu Lancry   +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, G. Cozzani, M. Alho, K. Horaites, H. Zhou, A. Kit, Y. Pfau‐Kempf, S. Hoilijoki, U. Ganse, M. Battarbee, K. Papadakis, J. Suni, M. Dubart, F. Tesema‐Kebede, A. Workayehu, V. Tarvus, L. Kotipalo, V. Koikkalainen, L. Turc, M. Palmroth   +19 more
wiley   +1 more source

Optimizing Radiation Shielding for Fusion Maintenance Facilities: Insights From a Comprehensive Analysis of ITER Hot Cell

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
One of the primary goals of the ITER project is to demonstrate the safety characteristics of a fusion device, particularly in terms of radiation management. Radiation protection during maintenance periods is of special concern, as personnel performing maintenance‐like activities will be exposed to delayed gamma fields from numerous and complex ...
Pablo Martínez-Albertos, Patrick Sauvan, Juan Pablo Catalán, Mario Belotti, François Javier, Joffrey Germa, Yannick Le Tonqueze, Alexis Dammann, Rafael Juárez, Geng Chen   +9 more
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

Rotation and Neoclassical Ripple Transport in ITER

, 2017
Neoclassical transport in the presence of non-axisymmetric magnetic fields causes a toroidal torque known as neoclassical toroidal viscosity (NTV). The toroidal symmetry of ITER will be broken by the finite number of toroidal field coils and by test ...
Dorland, W., Landreman, M., Paul, E. J., Poli, F. M., Smith, H. M., Spong, D. A.   +5 more
core   +1 more source