Results 41 to 50 of about 464 (190)

Edge Fluid Turbulence Simulations of Stellarators With GRILLIX

Contributions to Plasma Physics, EarlyView.
ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir, Christoph Pitzal, Barnabas Csillag, Miguel Madeira, Marion Finkbeiner   +4 more
wiley   +1 more source

Experimental study and gyrokinetic simulations of isotope effects on core heat transport in JET tokamak deuterium and tritium plasmas

Nuclear Fusion
This paper presents a study on the dependence of the ion temperature stiffness on the plasma main ion isotope mass in JET ITER-like wall and C wall discharges.
D. Brioschi, P. Mantica, A. Mariani, N. Bonanomi, E. Delabie, J. Garcia, N. Hawkes, I. Jepu, D. Keeling, E. Lerche, E. Litherland-Smith, C.F. Maggi, S. Menmuir, G. Szepesi, D. Taylor, D. Van Eester, JET Contributors   +16 more
doaj   +1 more source

Self-generated vortex flows in a tokamak magnetic island with a background flow

Nuclear Fusion, 2023
We present a gyrokinetic theory of self-generated E × B vortex flows in a magnetic island in a collisionless tokamak plasma with a background vortex flow.
G.J. Choi
doaj   +1 more source

Effect of Magnetic Islands on Neoclassical Heat Diffusivity in a Global Tokamak Simulation

Contributions to Plasma Physics, EarlyView.
ABSTRACT Resonant magnetic perturbations (RMPs) alter magnetic field topology via island formation and can modify core transport in toroidal fusion devices. Using the global gyrokinetic particle‐in‐cell code XGC‐S, originally developed for stellarator geometries, we quantify how island topology affects neoclassical heat transport in a circular tokamak ...
Joseph X. Li, Toseo Moritaka, Ryutaro Kanno, Gakushi Kawamura, Robert Hager, C.‐S. Chang   +5 more
wiley   +1 more source

Reconstruction and interpretation of ionization asymmetry in magnetic confinement via synthetic diagnostics

Nuclear Fusion
Strong poloidal refueling asymmetry in the DIII-D tokamak is inferred from line radiation measurements. Synthetic diagnostics in neutral transport modeling coupled to gyrokinetic simulations illuminate implications for the plasma flow profile in the ...
G.J. Wilkie, F. Laggner, R. Hager, A. Rosenthal, S.-H. Ku, R.M. Churchill, L. Horvath, C.S. Chang, A. Bortolon   +8 more
doaj   +1 more source

Electromagnetic gyrokinetic instabilities in STEP

Nuclear Fusion, 2023
We present herein the results of a linear gyrokinetic analysis of electromagnetic microinstabilites in the conceptual high $-\beta,$ reactor-scale, tight-aspect-ratio tokamak Spherical Tokamak for Energy Production, https://step.ukaea.uk .
D. Kennedy, M. Giacomin, F.J. Casson, D. Dickinson, W.A. Hornsby, B.S. Patel, C.M. Roach   +6 more
doaj   +1 more source

Improved Conservative Scheme for Lenard‐Bernstein Collisions in Gyrokinetic Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Turbulence in the edge and scrape‐off layer regions plays a critical role for the performance of future magnetic confinement fusion power plants. Gyrokinetic simulations allow studying this regime with high fidelity. A key aspect in these regions is the high concentration of impurities, which can radiate energy, leading to significant losses ...
Andrew Ivan Sulimro, Philipp Ulbl, Jordy Trilaksono, Frank Jenko   +3 more
wiley   +1 more source

How accurate are flux-tube (local) gyrokinetic codes in modeling energetic particle effects on core turbulence?

Nuclear Fusion, 2023
Flux-tube (local) gyrokinetic codes are widely used to simulate drift-wave turbulence in magnetic confinement devices. While a large number of studies show that flux-tube codes provide an excellent approximation for turbulent transport in medium-large ...
A. Di Siena, T. Hayward-Schneider, P. Mantica, J. Citrin, F. Vannini, A. Bottino, T. Görler, E. Poli, R. Bilato, O. Sauter, F. Jenko   +10 more
doaj   +1 more source

Compressional magnetic fluctuations in global gyrokinetics and reconnection heating in the solar corona [PDF]

In the area of gyrokinetic simulations of turbulence in magnetized plasmas such as those in fusion devices, global frameworks are used to address radial profile effects.
Tsao, Shu-Wei
core   +1 more source

Capturing Secondary Kinetic Instabilities in Three‐Dimensional Dayside Reconnection Using an Improved Gradient‐Based Closure

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract Magnetic reconnection is a highly dynamic process that excites a wide variety of kinetic waves and instabilities. Transverse current sheet instabilities such as the lower‐hybrid drift and secondary drift‐kink instabilities in particular have been shown by kinetic simulations to modify the reconnection and introduce significant turbulence and ...
K. Bradshaw, A. H. Hakim, J. Juno, J. Pawlak, J. M. TenBarge, A. Bhattacharjee   +5 more
wiley   +1 more source