Toroidal Microinstability Studies of High Temperature Tokamaks.

摘要

Results from comprehensive kinetic microinstability calculations are presented showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter (eta)(sub i) (equivalent to) (dlnT(sub i)/dr)/(dlnn(sub i)/dr), the characteristic features of the dominant mode are those of the (eta)(sub i)-type instability when (eta)(sub i) > (eta)(sub ic) (approximately)1.2 to 1.4 and of the trapped-electron mode when (eta)(sub i) < (eta)(sub ic). 16 refs., 7 figs.