Results 161 to 170 of about 464 (190)

Gyrokinetic perpendicular dynamics

Physics of Plasmas, 1999
Gyrokinetic perpendicular dynamics, an important component not systematically considered in previous gyrokinetic theories, is identified and developed. A “distribution function” S and its governing gyrokinetic equation are introduced to describe the gyrokinetic perpendicular dynamics.
H. Qin, W. M. Tang, W. W. Lee, G. Rewoldt   +3 more
openaire   +1 more source

Paradigm for global gyrokinetic turbulence

Physical Review E
Using a wave-number-advection algorithm, we describe a method to add global profile curvature terms to the local gyrokinetic equations. This approach enables a high-precision global simulation capability without sacrificing the efficiency and spectral accuracy of local simulations. Preliminary numerical results suggest that there are two distinct types
J. Candy, A. Dudkovskaia, E. A. Belli
openaire   +2 more sources

General frequency gyrokinetics

The Physics of Fluids, 1983
A gyrokinetic formalism is developed which enables a treatment of linear waves of arbitrary wave frequency ω for general magnetic field geometries. The treatment is an extension of previous gyrokinetic techniques which were restricted to the low-frequency (ω<Ω) regime.
Lee, X. S., Myra, J. R., Catto, Peter J.
openaire   +1 more source

Electromagnetic gyrokinetic simulations

Physics of Plasmas, 2004
A new electromagnetic kinetic electron δf particle simulation model has been demonstrated to work well at large values of plasma β times the ion-to-electron mass ratio [Y. Chen and S. E. Parker, J. Comput. Phys. 198, 463 (2003)]. The simulation is three-dimensional using toroidal flux-tube geometry and includes electron-ion collisions.
S. E. Parker, Y. Chen, W. Wan, B. I. Cohen, W. M. Nevins   +4 more
openaire   +1 more source

THE GYROKINETIC APPROXIMATION FOR THE VLASOV–POISSON SYSTEM

Mathematical Models and Methods in Applied Sciences, 2000
Consider a plasma in a strong constant magnetic field with self-consistent electric field. We present here the formal derivation that leads to the so-called guiding center approximation, and justify it in the case of a well-prepared initial density of particles.
openaire   +2 more sources

Gyrokinetic turbulent heating

Physics of Plasmas, 2006
Expressions for particle and energy fluxes and heating rates due to turbulence are derived. These fluxes and heating rates are identified from moments of an extended drift-kinetic equation for the equilibrium distribution function. These include neoclassical as well as turbulent diffusion and heating.
F. L. Hinton, R. E. Waltz
openaire   +1 more source

Spectral treatment of gyrokinetic shear flow

Journal of Computational Physics, 2018
Abstract Sheared E × B flow in a tokamak, driven by external torque from neutral beam injection, is known to have an important stabilizing effect on drift-wave turbulence. In gyrokinetic codes, flow shear can be implemented directly on a radial mesh with nonperiodic boundary conditions.
Jeff Candy, Emily A. Belli
openaire   +1 more source

Generalized gyrokinetics

Plasma Physics, 1981
P J Catto, W M Tang, D E Baldwin
openaire   +1 more source

Gyrokinetics

2022
openaire   +2 more sources

A Survey of Pedestal Magnetic Fluctuations Using Gyrokinetics and a Global Reduced Model for Microtearing Stability

Physics of Plasmas, 2022
Ehab M Hassan, Walter Guttenfelder, Ahmed Diallo   +2 more
exaly