LOCAL TEST OF PARALLEL ELECTRICAL-RESISTIVITY IN THE TOKAMAK-FUSION-TEST-REACTOR

Local, time-resolved measurements have been made of the response of th e internal magnetic-field distribution to large changes in the total p lasma current. Measurements were made by the motional Stark effect (MS E) polarimeter on the Tokamak Fusion Test Reactor (TFTR). [R. J. Hawry luk et al., Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Ag ency, Vienna, 1987) Vol. I, p. 51.] A direct test of the classical and neoclassical resistivity models was made by comparing the predicted f ield evolution using either model to that measured. It was found that the neoclassical resistivity model was a better predictor of the local magnetic-field temporal evolution than was the classical model. (C) 1 997 American Institute of Physics.