The change in the safety factor profile at a sawtooth collapse
- 1 April 1991
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 33 (4) , 289-296
- https://doi.org/10.1088/0741-3335/33/4/002
Abstract
Perturbations of the electron density and the poloidal magnetic field induced by sawtooth instabilities are studied using interferometric and polarimetric data. The change in the safety factor profile at a sawtooth collapse is deduced. It is found that sawteeth do not lead to complete reconnection of the poloidal flux since ( Delta q0)collapse0. A comparison of the rate of change of q0 between sawteeth with field diffusion calculations assuming neo-classical resistivity also suggests that complete reconnection does not take place.Keywords
This publication has 3 references indexed in Scilit:
- Measurement of current-density changes during sawtooth activity in a tokamak by far-infrared polarimetry (invited)Review of Scientific Instruments, 1988
- X-ray tomography on JETNuclear Fusion, 1988
- Sawtooth oscillationsPlasma Physics and Controlled Fusion, 1986