Results 51 to 60 of about 330 (178)

Implications of Innovative Nuclear Technologies on Ghana’s Nuclear Future

Science and Technology of Nuclear Installations, Volume 2026, Issue 1, 2026.
Innovations in nuclear technology have the potential to play a transformative role in Ghana’s pursuit of a secure, reliable and low‐carbon energy future. This review examines recent global advances in nuclear reactor technologies, fuel cycle systems, waste management approaches, regulatory practices and digital applications and assesses their relevance
R. G. Abrefah, B. K. A. Baiden, F. Ameyaw, S. A. Zakaria, Doddy Kastanya   +4 more
wiley   +1 more source

Long‐Term Photovoltaic System Performance in Cold, Snowy Climates

Progress in Photovoltaics: Research and Applications, Volume 33, Issue 11, Page 1180-1197, November 2025.
We review degradation rates of photovoltaic systems located in cold humid continental, subarctic, and tundra climates and analyze three new photovoltaic systems > 60° N in Alaska and Canada with each with between 5 and 16 years of data. Overall, PV systems located in cold climates have a median degradation rate of −0.33%/year.
Erin M. Tonita, Dirk C. Jordan, Silvana Ovaitt, Henry Toal, Karin Hinzer, Christopher Pike, Chris Deline   +6 more
wiley   +1 more source

Turbulence-reduced high-performance scenarios in Wendelstein 7-X

Nuclear Fusion
In the Wendelstein 7-X (W7-X) stellarator, turbulence is the dominant transport mechanism in most discharges. This leads to a ‘clamping’ of ion temperature over a wide range of heating power, predominantly flat density profiles where hollow profiles ...
O.P. Ford, M. Beurskens, S.A. Bozhenkov, S. Lazerson, L. Vanó, A. Alonso, J. Baldzuhn, C.D. Beidler, C. Biedermann, R. Burhenn, G. Fuchert, D. Hartmann, M. Hirsch, A. Langenberg, H. Laqua, P. McNeely, N. Pablant, E. Pasch, F. Reimold, T. Romba, N. Rust, R. Schroeder, E.R. Scott, T. Stange, H.M. Smith, D. Gradic, R.C. Wolf, D. Zhang, the W7-X Team   +28 more
doaj   +1 more source

Full-flux-surface effects on electrostatic turbulence in Wendelstein 7-X-like plasmas

Nuclear Fusion, 2023
We present the first nonlinear, gyrokinetic, surface-global simulations of a Wendelstein 7-X-like stellarator with kinetic electrons. As a first application, we investigate the interplay between Ion Temperature Gradient (ITG) and Trapped Electron Mode ...
Felix Wilms, Alejandro Bañón Navarro, Frank Jenko   +2 more
doaj   +1 more source

Modeling resistive-inductive evolution of currents in Wendelstein 7-X

Nuclear Fusion
This research investigates the temporal evolution of the toroidal plasma current in the Wendelstein 7-X (W7-X) stellarator under different heating, fueling, and current drive scenarios.
L. van Ham, S.A. Lazerson, J.C. Schmitt, B.F. Lee, M. Beurskens, K.J. Brunner, N. Chaudhary, G. Fuchert, J. Geiger, M. Hirsch, J. Knauer, A. Langenberg, J.W. Oosterbeek, N. Pablant, E. Pasch, K. Rahbarnia, G. Weir, the W7-X Team   +17 more
doaj   +1 more source

Study on resonant electron cyclotron heating by OSXB double mode conversion at the W7-X stellarator

Nuclear Engineering and Technology, 2018
Electromagnetic waves potentially have been used to heat overdense nuclear fusion plasmas through a double mode conversion from ordinary to slow extraordinary and finally to Electron Bernstein Wave (EBW) modes, OSXB.
S. Adlparvar, S. Miraboutalebi, S.M. Sadat Kiai, L. Rajaee   +3 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

Global gyrokinetic analysis of Wendelstein 7-X discharge: unveiling the importance of trapped-electron-mode and electron-temperature-gradient turbulence

Nuclear Fusion
We present the first nonlinear, gyrokinetic, radially global simulation of a discharge of the Wendelstein 7-X-like stellarator, including kinetic electrons, an equilibrium radial electric field, as well as electromagnetic and collisional effects.
Felix Wilms, Alejandro Bañón Navarro, Thomas Windisch, Sergey Bozhenkov, Felix Warmer, Golo Fuchert, Oliver Ford, Daihong Zhang, Torsten Stange, Frank Jenko, the W7-X Team   +10 more
doaj   +1 more source

Impact of impurities on the effective charge state distribution in the limiter plasmas of Wendelstein 7-X

Nuclear Materials and Energy, 2019
Carbon and oxygen have been identified as the two major impurities in the first limiter operational phase of the stellarator Wendelstein 7-X. We evaluate basic differences between these impurities regarding the effective charge state in the boundary ...
J. Cosfeld, M. Rack, D. Reiter, P. Drews, Y. Feng, D. Zhang   +5 more
doaj   +1 more source

Evaluating keratometry and corneal astigmatism data from biometers and anterior segment tomographers and mapping to reconstructed corneal astigmatism

Clinical &Experimental Ophthalmology, Volume 52, Issue 6, Page 627-638, August 2024.
Abstract Background To compare results from different corneal astigmatism measurement instruments; to reconstruct corneal astigmatism from the postimplantation spectacle refraction and toric intraocular lens (IOL) power; and to derive models for mapping measured corneal astigmatism to reconstructed corneal astigmatism.
Achim Langenbucher, Leonardo Taroni, Catarina P. Coutinho, Alan Cayless, Nóra Szentmáry, Peter Hoffmann, Jascha Wendelstein, Giacomo Savini   +7 more
wiley   +1 more source