Asymmetry of radial heat pulse propagation at TEXTOR
Previous analyses of the heat pulse propagation following the sawtooth collapse have been based on observations along one radial direction only. The present paper reports on the simultaneous observation of heat pulse propagation along two radial directions in the equatorial plane, that is along both the high field side (HFS) and the low field side (LFS). For a given flux surface, the arrival of the heat pulse at the HFS is delayed by up to 1 ms compared with the arrival at the LFS. The observed delay agrees with an estimate of the time required for parallel electron heat transport along the magnetic field lines connecting the corresponding LFS and HFS isobars. This suggests that the primary radial heat transport occurs on the LFS, whereas the HFS is fed subsequently from the LFS by temperature equilibration along the connecting magnetic field lines.
Bibliographic Reference: Article: Nuclear Fusion, Vol. 33 (1993) No. 6, pp. 921-928
Record Number: 199311252 / Last updated on: 1994-11-29
Original language: en
Available languages: en