The change in the safety factor profile at a sawtooth collapseFunded under: FP2-FUSION 10C
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. A comparison of the rate of change of the axial safety factor between sawteeth with field diffusion calculations, assuming neo-classical resistivity, also suggests that complete reconnection does not take place.
Bibliographic Reference: Report: JET-P(90)43 EN (1990) 11 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199110100 / Last updated on: 1994-12-02
Original language: en
Available languages: en