Results 101 to 110 of about 464 (190)

Reduction and approximation in gyrokinetics

, 2007
15 pages ...
Ghendrih, Philippe, Lima, Ricardo, Mendes, R. Vilela   +2 more
openaire   +3 more sources

Gyrokinetics of resonant particles in a collisionless plasma

Journal of Plasma Physics, 1985
A consistent drift-kinetic theory is developed for the interaction of resonant particles in a relativistic magnetized plasma with HF (high-frequency) wave packets for arbitrary ratio of the gyroradius to the wavelength. Gyrokinetic equations for the plasma particles are obtained for Čerenkov and cyclotron resonances as well as for those at the ...
KARNILOVICH S.P., MALEK G.F., MILANTIEV V.P.   +2 more
openaire   +3 more sources

Potential vorticity conservation for plasma turbulence in an inhomogeneous magnetic field: Theory and implications [PDF]

The concept and theory of potential vorticity in drift wave turbulence are extended to the case of an inhomogeneous magnetic field. A one-field magnetic potential vorticity conserving equation is derived via the use of conservative gyrokinetics.
Na, Y-S, Diamond, PH, Hahm, TS, Park, SJ
core   +1 more source

Collision-dependent power law scalings in two dimensional gyrokinetic turbulence [PDF]

, 2014
Nonlinear gyrokinetics provides a suitable framework to describe short-wavelength turbulence in magnetized laboratory and astrophysical plasmas. In the electrostatic limit, this system is known to exhibit a free energy cascade towards small scales in ...
Jenko, F., F. Jenko, Bañón Navarro, A., A. Bañón Navarro, Told, D., S. S. Cerri, D. Told, Cerri, S., Banon Navarro, A. ; https://orcid.org/, CERRI, SILVIO SERGIO   +9 more
core   +1 more source

Destabilization of geodesic acoustic-like mode in the presence of poloidally inhomogeneous heat sources in tokamak plasmas

Nuclear Fusion
The effects of poloidally inhomogeneous heat sources are investigated through a gyrokinetic formula in collisionless toroidal plasmas. A gyrokinetic dispersion relation is newly derived under the assumption that equilibrium parallel heat flows are ...
Young-Hoon Lee, Jungpyo Lee
doaj   +1 more source

Impact of supra-thermal particles on plasma performance at ASDEX Upgrade with GENE-Tango simulations

Nuclear Fusion
This paper presents global gyrokinetic simulations on the transport time scale of an ASDEX Upgrade H-mode discharge showing a pronounced peaking of the on-axis ion temperature profiles.
A. Di Siena, R. Bilato, A. Bañón Navarro, M. Bergmann, L. Leppin, T. Görler, E. Poli, M. Weiland, G. Tardini, F. Jenko, the ASDEX Upgrade Team, the EUROfusion MST1 Team   +11 more
doaj   +1 more source

A general framework for quantifying uncertainty at scale. [PDF]

Commun Eng, 2022
Farcaş IG, Merlo G, Jenko F.
europepmc   +1 more source

The Gyrokinetic Description of Microturbulence in Magnetized Plasmas

, 2012
Nonlinear gyrokinetics is the major formalism used for both the analytical and numerical descriptions of low-frequency microturbulence in magnetized plasmas.
John A. Krommes
core   +1 more source

The impact of E × B shear on microtearing based transport in spherical tokamaks

Nuclear Fusion
Electromagnetic microtearing modes (MTMs) have been observed in many different spherical tokamak (ST) regimes. Understanding how these and other electromagnetic modes nonlinearly saturate is likely critical in understanding the confinement of a high β ST.
B.S. Patel, M.R. Hardman, D. Kennedy, M. Giacomin, D. Dickinson, C.M. Roach   +5 more
doaj   +1 more source

Global gyrokinetic simulations of electromagnetic turbulence in STEP

Nuclear Fusion
This paper presents gradient-driven global electromagnetic gyrokinetic simulations for a conceptual burning flat-top operating point of STEP (Tholerus et al 2024 Nucl.
D. Kennedy, F. Sheffield, T. Görler, C.M. Roach, M. Giacomin, A. Bokshi, D. Dickinson, H.G. Dudding, B.S. Patel   +8 more
doaj   +1 more source