Moment approach to the bootstrap current in nonaxisymmetrictoroidal plasmas using of Monte Carlo methods

摘要

To evaluate the bootstrap current in nonaxisymmetric toroidal plasmas quantitatively, a δfMonteCarlo method is incorporated into the moment approach. From the drift-kinetic equation with thepitch-angle scattering collision operator, the bootstrap current and neoclassical conductivitycoefficients are calculated. The neoclassical viscosity is evaluated from these two monoenergetictransport coefficients. Numerical results obtained by the δfMonte Carlo method for a modelheliotron are in reasonable agreement with asymptotic formulae and with the results obtained by thevariational principle.