Rapid global response of the electron temperature during pellet injection on Tore Supra
During pellet injection in the Tore Supra tokamak, a very fast electron temperature drop in the whole plasma column has been observed by means of a fast acquisition ECE Fabry-Perot interferometer system. The time delay of the temperature drop between plasma edge and centre is less than 20 micro-s, corresponding to a propagation velocity of the order of 25 km/s, much larger than both the pellet velocity and the ordinary diffusion velocity. A model of neutral atom diffusion, in which the charge-exchange process plays a key role, is proposed to explain such phenomena.
Bibliographic Reference: Report: EUR-CEA-FC-1489 EN (1993) 17 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199310990 / Last updated on: 1994-11-29
Original language: en
Available languages: en