An approximate two-dimensional solver of the nonlinear Fokker-Planck-Landau collision
operator has been developed using the assumption that the particle probability distribution …

In transport barriers, particularly H-mode edge pedestals, radial scale lengths can become
comparable to the ion orbit width, causing neoclassical physics to become radially nonlocal …

We assess the accuracy and limitations of two analytic models of the tokamak bootstrap
current:(1) the well-known Sauter model (1999 Phys. Plasmas 6 2834, 2002 Phys. Plasmas …

Numerical techniques for discretization of velocity space in continuum kinetic calculations
are described. An efficient spectral collocation method is developed for the speed …

A gyrokinetic linearized exact (not model) Landau collision operator is derived by
transforming the symmetric and conservative Landau form. The formulation obtains the …

Verification of continuum solutions to the electron and ion drift kinetic equations (DKEs) in
NIMROD [CR Sovinec et al., J. Comp. Phys. 195, 355 (2004)] is demonstrated through …

Kinetic magnetohydrodynamics refers usually to the hybrid fluid and kinetic description of a
zero-Larmor-radius collisionless plasma, originally formulated in the classic papers of …

The DK4D code has been written to solve a set of time-dependent, axisymmetric, finite-
Larmor-radius drift-kinetic equations (DKEs) for the non-Maxwellian part of the electron and …

The neoclassical description of an axisymmetric toroidal plasma equilibrium is formulated for
an unconventionally low ordering of the collisionality that suits realistic thermonuclear fusion …

Neoclassical effects (eg, conductivity reduction and bootstrap currents) have a profound
impact on many magnetohydrodynamic (MHD) instabilities in toroidally-confined plasmas …