Results 61 to 70 of about 1,247 (174)

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

Inertial range turbulence in kinetic plasmas

, 2007
The transfer of turbulent energy through an inertial range from the driving scale to dissipative scales in a kinetic plasma followed by the conversion of this energy into heat is a fundamental plasma physics process.
Braginskii S. I., Gregory G. Howes, Iroshnikov R. S., Iroshnikov R. S.   +3 more
core   +1 more source

Fourier-Hermite decomposition of the collisional Vlasov-Maxwell system: implications for the velocity space cascade [PDF]

, 2018
Turbulence at kinetic scales is an unresolved and ubiquitous phenomenon that characterizes both space and laboratory plasmas. Recently, new theories, {\it in-situ} spacecraft observations and numerical simulations suggest a novel scenario for turbulence,
Camporeale, Enrico, Pezzi, Oreste, Servidio, Sergio, Valentini, Francesco, Veltri, Pierluigi   +4 more
core   +3 more sources

Statistical Study of Electron Kinetic Entropy Generation at Earth's Quasi‐Perpendicular Bow Shock

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract We use the Magnetospheric Multiscale mission to study electron kinetic entropy across Earth's quasi‐perpendicular bow shock. We perform a statistical study of how the change in electron entropy depends on the different plasma parameters associated with a collisionless shock crossing.
M. Lindberg, A. Wallner, S. Berglund, A. Vaivads   +3 more
wiley   +1 more source

Integrated modelling of neon impact on JET H-mode core plasmas

Nuclear Fusion, 2022
Nuclear fusion reactor plasmas will need to exhaust a significant proportion of energy flux through radiative processes, to enable acceptable divertor loads. This can be obtained by line radiation from impurities, injected from the plasma edge. There are
M. Marin, J. Citrin, C. Giroud, C. Bourdelle, Y. Camenen, L. Garzotti, A. Ho, M. Sertoli, JET Contributors   +8 more
doaj   +1 more source

Kinetic Theory of Drift‐Mirror Mode

Geophysical Research Letters, Volume 51, Issue 18, 28 September 2024.
Abstract We present a nonlocal gyrokinetic theory for the drift‐mirror mode in high‐β $\beta $ anisotropic plasmas. Here, β $\beta $ represents the ratio of plasma pressure to magnetic pressure. The equilibrium distribution is established self‐consistently via guiding‐center Hamiltonian theory.
Yao Yao, Haotian Chen, Zilong Li, Jiquan Li   +3 more
wiley   +1 more source

Direct Evidence of Drift‐Compressional Wave Generation in the Earth's Magnetosphere Detected by Arase

Geophysical Research Letters, Volume 51, Issue 8, 28 April 2024.
Abstract We present the first direct evidence of an in situ excitation of drift‐compressional waves driven by drift resonance with ring current protons in the magnetosphere. Compressional Pc4–5 waves with frequencies of 4–12 mHz were observed by the Arase satellite near the magnetic equator at L ∼ 6 in the evening sector on 19 November 2018.
K. Yamamoto, A. V. Rubtsov, D. V. Kostarev, P. N. Mager, D. Yu. Klimushkin, M. Nosé, A. Matsuoka, K. Asamura, Y. Miyoshi, S. Yokota, S. Kasahara, T. Hori, K. Keika, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Shoji, S. Nakamura, I. Shinohara   +18 more
wiley   +1 more source

First-principle based predictions of the effects of negative triangularity on DTT scenarios

Nuclear Fusion
Plasmas with negative triangularity (NT) shape have been recently shown to be able to achieve H-mode levels of confinement in L-mode, avoiding detrimental edge localised modes.
A. Mariani, A. Balestri, P. Mantica, G. Merlo, R. Ambrosino, L. Balbinot, D. Brioschi, I. Casiraghi, A. Castaldo, L. Frassinetti, V. Fusco, P. Innocente, O. Sauter, G. Vlad   +13 more
doaj   +1 more source

Gyrokinetic studies of the effect of beta on drift-wave stability in NCSX [PDF]

, 2012
The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma beta on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM) in National Compact Stellarator Experiment (NCSX) geometry.
Baumgaertel, J. A., Hammett, G. W., Mikkelsen, D. R., Nunami, M., Xanthopoulos, P.   +4 more
core   +3 more sources

Two-dimensional gyrokinetic turbulence [PDF]

Journal of Fluid Mechanics, 2010
Two-dimensional gyrokinetics is a simple paradigm for the study of kinetic magnetised plasma turbulence. In this paper, we present a comprehensive theoretical framework for this turbulence. We study both the inverse and direct cascades (the ‘dual cascade’), driven by a homogeneous and isotropic random forcing.
Plunk, G, Cowley, S, Schekochihin, A, Tatsuno, T   +3 more
openaire   +2 more sources