Results 51 to 60 of about 3,492 (198)

Plasma self-driven current in tokamaks with magnetic islands

Nuclear Fusion
Magnetic island perturbations may cause a reduction in plasma self-driven current that is needed for tokamak operation. A novel effect on tokamak self-driven current revealed by global gyrokinetic simulations is due to magnetic-island-induced 3D electric
W.X. Wang, M.G. Yoo, E.A. Startsev, S. Kaye, S. Ethier, J. Chen   +5 more
doaj   +1 more source

Resonant interaction of fast particles with Alfven waves in spherical tokamaks [PDF]

, 2009
The Spherical Tokamak (ST) concept has become one of the main avenues in magneticnuclear fusion research since STs successfully demonstrated plasma operationat [Beta] = 2P[mu]0=B2~1.
Lilley, Matthew Keith, Lilley, Matthew Keith   +1 more
core  

The Solar Wind Interaction With an Orbiting Venus

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Studies of the large‐scale interaction of the solar wind with planets have often been considered along the line of the sun to the planet, neglecting the planet's orbital motion. This paper describes a new refinement in the long history of Venus simulations, the addition of the planet's orbital motion.
Stephen H. Brecht, Stephen A. Ledvina
wiley   +1 more source

Fast ion orbits in spherical tokamaks [PDF]

Physics of Plasmas, 1996
In a spherical tokamak, the 1/R variation of the toroidal field is extreme, and for a given value of the safety factor a relatively low average toroidal field can be used, together with large plasma current and large plasma minor radius and elongation. The poloidal and toroidal fields are then of similar size.
openaire   +3 more sources

Reducing turbulent transport in tokamaks by combining intrinsic rotation and the low momentum diffusivity regime

Nuclear Fusion
Based on the analysis of a large number of high-fidelity nonlinear gyrokinetic simulations, we propose a novel strategy to improve confinement in spherical tokamak plasmas by combining up-down asymmetric flux surface shaping with the Low Momentum ...
Haomin Sun, Justin Ball, Stephan Brunner, Anthony Field, Bhavin Patel, Daniel Kennedy, Colin Roach, Diego Jose Cruz-Zabala, Fernando Puentes Del Pozo, Eleonora Viezzer, Manuel Garcia Munoz   +10 more
doaj   +1 more source

Electron Bernstein waves in spherical tokamak plasmas with "magnetic wells"

, 2004
In addition to traditional regimes with monotonously increasing magnetic field, regimes with "magnetic wells" also occur in spherical tokamaks (STs). The magnetic field profile inversion modifies significantly the whole picture of the wave propagation ...
A D Piliya, A Yu Popov, Akhiezer A I, Allis W P, E N Tregubova, Piliya A D, Swanson D G   +6 more
core   +1 more source

A h‐Adaptivity Strategy for Hybridizable Discontinuous Galerkin (HDG) Simulations of Fluid Transport Models in Tokamak Plasma

International Journal for Numerical Methods in Engineering, Volume 126, Issue 17, 15 September 2025.
ABSTRACT The highly anisotropic, multi‐scale nature of fusion plasma simulations in tokamaks, combined with the complexity in the geometries of plasma‐facing components and magnetic equilibrium, challenges numerical schemes. They therefore require the development of advanced numerical techniques to enhance computational efficiency and enable codes to ...
Marcello Capasso, Ivan Kudashev, Frédéric Schwander, Éric Serre   +3 more
wiley   +1 more source

Ion energy measurements on MAST using a midplane RFEA

, 2013
Ion energy measurements have been made in the scrape off layer of the Mega Amp Spherical Tokamak (MAST) using a midplane retarding field energy analyser (RFEA) in H-mode plasmas during the inter-edge localised mode (ELM) period and during type I and type
Allan, S. Y., Elmore, S., Kirk, A., Kočan, M., Tamain, P.   +4 more
core   +1 more source

Measurements of Auroral Plasma Properties Using Low‐Cost, Mobile, Ground‐Based Detectors

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract An expedition to Fairbanks, AK, was undertaken to study the aurora during the peak of solar cycle 25. Low‐cost diagnostics were developed to enable ground‐based measurements of ionospheric plasma parameters and auroral phenomena, namely a compact spectrometer and a high‐resolution all‐sky camera with 2‐axis magnetometer. Observations were made
S. Mackie, J. Rivera, T. Evans, J. L. Ball, S. Dannhoff, J. Heinzel, J. Van de Lindt, S. Moroch   +7 more
wiley   +1 more source

Ideal magnetohydrodynamic simulations of unmagnetized dense plasma jet injection into a hot strongly magnetized plasma

, 2011
We present results from three-dimensional ideal magnetohydrodynamic simulations of unmagnetized dense plasma jet injection into a uniform hot strongly magnetized plasma, with the aim of providing insight into core fueling of a tokamak with parameters ...
Arseniev, Bengtsson, Castel, Cheifetz, Goodin, H. Jin, Hamilton, Hara, Hara, Hotchkis, Hua, Hwang, Lhersonneau, Li, Luo, Möller, Nilsson, Orlandi, Rodriguez-Guzman, S.-Y. Yu, Sheihk, Sheikh, Sheikh, Sheline, Shizuma, Sieja, Skalski, Smith, Stephens, Sun, Urban, Urban, Velazquez, Verma, Wood, Wu, X.-H. Zhou, Y. Sun, Y.-C. Yang, Y.-H. Zhang, Y.-X. Liu, Yang, Yeoh   +42 more
core   +1 more source