ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Neoclassical theory with the impurity rotational velocity is used to evaluate the radial electric field, Er, in a tokamak. The result of using the complete matrix method for the deuterium–carbon plasma is compared with a reduced analytic formula for determining Er [Ernst et al., Phys. Plasmas 5, 665 (1998)]. The analytic formula is shown to overestimate the Er magnitude and its gradient. Two transport measures of the effect of the Er shear are compared for the reversed shear and enhanced reversed shear discharges in Tokamak Fusion Test Reactor [Mazzucato et al., Phys. Rev. Lett. 77, 3145 (1996)]. It is shown that the combined Er and magnetic shear measure, Υs, from linear stability theory gives a higher correlation with the observed transition between the two discharges than the vorticity measure ωs from Er shear alone. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.873522
