ALPHA-PARTICLE CLASSICAL TRANSPORT IN TOKAMAKS

Alpha particle classical transport for both axisymmetric and non-axisy mmetric cases is comprehensively considered. A two dimensional (one di mension for configuration space and one dimension for velocity space) time-dependent linear Fokker Planck equation is computed to evaluate t he steady state alpha particle loss fraction and the heating efficienc y. The calculation results show that: the effect of ripple on the glob al particle confinement time is more apparent than its effect on the h eating efficiency; the ripple has little effect on the alpha particle heating profile; the larger the ripple amplitude is, the harder the lo st alpha particle energy spectrum is.