# Orbit-averaged guiding-center Fokkerâ€“Planck operator

## Related Articles

- Self-similar solution to the Fokkerâ€“Planck equation in inhomogeneous plasma. Bychenkov, V. Yu.; Rozmus, W.; Teshima, R. // Physics of Plasmas;Jul2002, Vol. 9 Issue 7, p2872
A self-similar solution to the stationary electron Fokker-Planck equation has been found in an inhomogeneous plasma with a given input of energy flux. This solution describes a reduction in the number of bulk electrons and the formation of a superthermal tail with a power law dependence on...

- Linear Noise Approximation Method for Calculating Nonequilibrium Fluctuations of the Occupation Numbers in Radiative—Collisional Average Ion Models. Gasparyan, P. D.; Gorshikhin, A. A. // Plasma Physics Reports;May2003, Vol. 29 Issue 5, p425
A novel method is proposed for calculating nonequilibrium fluctuations of the mean occupation numbers of the electron shells in the radiative-collisional average-ion models of multicharged plasma kinetics. For the class of Slater ionic models, equations are derived for the mean occupation...

- Numerical Fokker-Planck calculations in nonuniform grids. Bizarro, Joa˜o P. S.; Rodrigues, Paulo // Physics of Plasmas;May2001, Vol. 8 Issue 5, p1903
A practical, implicit finite-difference scheme, accurate to second order both in time step and mesh size, is presented to solve nonlinear Fokkerâ€“Planck (FP) equations in nonuniform grids. Weighting coefficients are introduced for proper equilibration, and the conditions under which the...

- An asymptotic approximation of the Fokker—Planck model of evolution of superthermal ultrarelativistic particles in the presence of interaction scaling. Ignat’ev, Yu.; Ziatdinov, P. // Russian Physics Journal;Feb2009, Vol. 52 Issue 2, p210
The evolution of a superthermal relict plasma component is studied using a nonequilibrium model of the Universe [] and a kinetic equation of the Fokkerâ€“Planck type []. Given is the evidence of two maxima in the distribution of superthermal particles. The first maximum can further evolve...

- Covariant formulation of the Fokker-Planck equation for moderately coupled relativistic magnetoplasma. Baral, K. C.; Mohanty, J. N. // Physics of Plasmas;Apr2000, Vol. 7 Issue 4
The covariant approach of using the Fokker-Planck equation to treat large angle as well as small angle ion-electron collisions in a magnetoplasma is formulated. It includes third term velocity differential coefficients relevant for moderately coupled plasma valid for large Coulomb logarithm...

- A one-dimensional model for lower-hybrid current drive including perpendicular dynamics. Fuchs, V.; Cairns, R. A.; Shoucri, M. M.; Hizanidis, K.; Bers, A. // Physics of Fluids (00319171);Dec85, Vol. 28 Issue 12, p3619
The two-dimensional (velocity space) Fokkerâ€“Planck equation for lower-hybrid current drive is approximated by its perpendicular moments hierarchy closed in the second moment equation. The closure is derived on the basis of a distribution function composed of a central thermal Maxwellian...

- A new solution method for the gyrokinetic Fokker-Planck equation. Tessarotto, M.; Gregoratto, D.; Zheng, L.-J. // Physics of Plasmas;Oct95, Vol. 2 Issue 10, p3614
Proposes a non-perturbative and non-variational solution method for the gyrokinetic equation, based on a suitable approximation for the linearized Fokker-Planck collision operator. Evaluation of arbitrary moments of the distribution function for a weakly collisional magnetoplasma with toroidal...

- Slowing down of an ion beam in a background plasma. Newsham, D.; Ross, T.J.; Rynn, N. // Physics of Plasmas;Jul96, Vol. 3 Issue 7, p2824
Reports on the measurement of the slowing down of a barium ion into two different plasma backgrounds using laser-induced fluorescence. Maintenance of ion beam density to treat it as a class of test particles; Measured changes in the velocity profile of the ion beam that agrees well with...

- A Fokkerâ€“Planck operator for the emission and absorption of electron plasma waves in a magnetized plasma. Ware, Alan A. // Physics of Fluids B: Plasma Physics;Aug93, Vol. 5 Issue 8, p2769
For slab geometry the perturbation of the electrostatic wake of a superthermal test electron in a magnetized plasma (Ï‰ce > Ï‰pe) due to moderate magnetic shear is determined. Allowing for the spherical symmetry of the surfaces of constant phase to the rear of the test electron, the...