Abstract
Neoclassical equilibrium and transport have been calculated with analytic solutions of a drift-kinetic equation in which the effect of collisions is included. The necessary introduction of approximations precluded the full description of the distribution function in all regimes and over all particle energies. C. O. Beasley, H. K. Meier, W. I. van Rij, and J. E. McCune have used the techniques inherent to the collisional plasma model (CPM) to develop a computer simulation for the dynamics of toroidally confined plasmas in the drift-kinetic, Fokker-Planck description. The CPM permits study of the neoclassical equilibrium without approximation in the drift-kinetic ordering. The neoclassical electron distribution function derived by M. N. Rosenbluth, R. D. Hazeltine, and F. L. Hinton is compared with the CPM for the banana regime. Good general agreement is obtained; discrepancies are attributed to a poor modeling of the collisional (low energy) particles in the model of Rosenbluth et al. The CPM is also compared with calculations by K. T. Tsang and J. D. Callen in the Pfirsch-Schlueter regime. When approximations made in these calculations are taken into consideration, good agreement is observed.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call