Results 71 to 80 of about 158 (153)

Reduction and approximation in gyrokinetics

, 2007
15 pages ...
Ghendrih, Philippe, Lima, Ricardo, Mendes, R. Vilela   +2 more
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Gyrokinetic linearized Landau collision operator [PDF]

Physical Review E, 2013
The full gyrokinetic electrostatic linearized Landau collision operator is calculated including the equilibrium operator, which represents the effect of collisions between gyrokinetic Maxwellian particles. First, the equilibrium operator describes energy exchange between different plasma species, which is important in multiple ion-species plasmas ...
openaire   +3 more sources

Electron heating in kinetic-Alfvén-wave turbulence. [PDF]

Proc Natl Acad Sci U S A, 2023
Zhou M, Liu Z, Loureiro NF.
europepmc   +1 more source

Gyrokinetic simulation of microtearing turbulence

, 2013
In modern fusion experiments, plasma turbulence is responsible for the radial heat transport and thus determines the plasma confinement within the magnetic field of tokamak devices. Deeper theoretical understanding is still needed and the detailed physical picture continues to evolve.
openaire   +3 more sources

Nonequilibrium gyrokinetic fluctuation theory and sampling noise in gyrokinetic particle-in-cell simulations [PDF]

Physics of Plasmas, 2007
The present state of the theory of fluctuations in gyrokinetic (GK) plasmas and especially its application to sampling noise in GK particle-in-cell (PIC) simulations is reviewed. Topics addressed include the Δf method, the fluctuation-dissipation theorem for both classical and GK many-body plasmas, the Klimontovich formalism, sampling noise in PIC ...
openaire   +1 more source

Kinetic-ballooning-limited pedestals in spherical tokamak plasmas

Nuclear Fusion
A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high- β tokamak NSTX.
J.F. Parisi, W. Guttenfelder, A.O. Nelson, R. Gaur, A. Kleiner, M. Lampert, G. Avdeeva, J.W. Berkery, C. Clauser, M. Curie, A. Diallo, W. Dorland, S.M. Kaye, J. McClenaghan, F.I. Parra   +14 more
doaj   +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

Laboratory measurements of the physics of auroral electron acceleration by Alfvén waves. [PDF]

Nat Commun, 2021
Schroeder JWR, Howes GG, Kletzing CA, Skiff F, Carter TA, Vincena S, Dorfman S.   +6 more
europepmc   +1 more source

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
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