Key points are not available for this paper at this time.
The rapid collapse of a sawtooth oscillation in the JET tokamak has been observed in detail on a fast time scale. Tomographic reconstruction of data from two x-ray cameras and electron-cyclotron-emission temperature profiles show that during the sawtooth collapse the central hot region is rapidly (in approximately 100) displaced off axis with an m=1 component and is then redistributed around a surface of constant minor radius. The theoretical implications of the measurements are discussed.
Edwards et al. (1986) studied this question.