Results 41 to 50 of about 36,485 (223)

Towards a Mean‐Field Braginskii Model for Stellarators

Contributions to Plasma Physics, EarlyView.
ABSTRACT Experiments in the stellarator Wendelstein 7‐X indicate that particle drifts have a significant impact on the plasma in the scrape‐off layer. However, drift effects have been absent in the mean‐field transport codes such as EMC3‐Eirene. For this reason, we present the first steps towards a mean‐field model that incorporates drifts. The code is
T. Tork, F. Reimold, D. Bold, B. Shanahan, B. Dudson, A. Stegmeir, P. Manz, The W7‐X Team   +7 more
wiley   +1 more source

Design scoping and systems modelling of ST-E1 using the PyTok power plant simulation code

Nuclear Fusion
To support the pre-concept design of Tokamak Energy’s (TEs) ST-E1 fusion power plant, we developed a new systems code, PyTok. PyTok codifies plasma physics and engineering constraints within a pure Python, object-oriented framework designed for rapid ...
C.L. Wilson, J. Astbury, M.J. Ginsberg, N. Hinton, E.N.J. Maartensson, S.A.M. McNamara, J. Willis, E. Yildirim, the ST-E1 Team   +8 more
doaj   +1 more source

Replacing Tunable Parameters in Weather and Climate Models With State‐Dependent Functions Using Reinforcement Learning

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 8, August 2026.
Abstract Weather and climate models rely on parameterizations to represent unresolved sub‐grid processes. Traditional schemes rely on fixed coefficients that are weakly constrained and tuned offline, contributing to persistent biases that limit their ability to adapt to underlying physics.
Pritthijit Nath, Sebastian Schemm, Henry Moss, Peter Haynes, Emily Shuckburgh, Mark J. Webb   +5 more
wiley   +1 more source

Thermal management and net-power evaluation of the ST-E1 fusion power plant

Nuclear Fusion
A comprehensive analysis of the thermal management and net-power performance is presented for the ST-E1 low aspect ratio tokamak fusion power plant. The study addresses the critical interplay between coolant system design, power cycle integration, and ...
Mohamed Khalid Elsharif Mohamed, Alasdair Burchill, Liviu Maatescu, Emre Yildirim, Jonathan Naish, Matthew Robinson, Vandeep Godhani, Samara Levine, Sandeep Irukuvarghula, Chris Wilson, Ivan Krastev, Robin Kamenicky, Abhishek Kumar   +12 more
doaj   +1 more source

Scalings for tokamak energy confinement [PDF]

Nuclear Fusion, 1990
On the basis of an analysis of the ITER L-mode energy confinement database, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scaling and an offset-linear scaling. The analysis indicates that the present multiplicity of scaling expressions for the energy confinement time TE in tokamaks (Goldston, Kaye ...
Yushmanov, P., Takizuka, T., Riedel, K., Kardaun, O., Cordey, J., Kaye, S., Post, D.   +6 more
openaire   +4 more sources

In Situ Sintering Studies of Reactive Sintered Borides (RSB) Neutron Shielding Materials

Journal of the American Ceramic Society, Volume 109, Issue 7, July 2026.
ABSTRACT Reactive sintered borides (RSBs) are a family of radiation‐dense materials made by powder metal processing and sintering of elemental precursors. Recent interest in RSBs has focused on their properties as high‐flux low‐activation thermal neutron absorbers for nuclear applications including fusion reactors.
Jessica Marshall, Suresh Srinivasan, Joe Gillham, Simon Middlesburgh   +3 more
wiley   +1 more source

Integrated physics and magnet design for the ST-E1 fusion power plant

Nuclear Fusion
ST-E1 is Tokamak Energy’s commercially competitive fusion power plant design featuring a lifetime high-temperature superconducting (HTS) magnet cage, which has completed its pre-concept design stage.
E.N.J. Maartensson, N. Welch, M. Scarpari, F. Malinowski, M. Borscz, M. Bristow, P.F. Buxton, J. Kang, M. Kruip, A.V. Langtry, N.A. Lopez, C. Marsden, S.A.M. McNamara, S. Medvedev, Y. Takase, P. Thomas, B. van Nugteren, C.L. Wilson, X. Zhang, the ST-E1 Team   +19 more
doaj   +1 more source

Spectroscopic diagnostics of superthermal electrons with high-number harmonic EC radiation in tokamak reactor plasmas

EPJ Web of Conferences, 2015
A method of spectroscopic diagnostics of the average perpendicular-to-magnetic-field momentum of the superthermal component of the electron velocity distribution (EVD), based on the high-number-harmonic electron cyclotron (EC) radiation, is suggested for
Minashin P.V., Kukushkin A.B.
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

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