Helium removal and transport studies in TEXTOR
Experiments demonstrating direct control of the He(2+) density in a tokamak plasma have been performed in the TEXTOR tokamak with the Advanced Limiter Test-II pump limiter. Helium is injected in a short gas puff from the outside of the plasma, is observed to reach the plasma core, and is then readily removed from the plasma (90 % of the He is removed in approximately 1 s). Active He pumping is found to be a valuable technique for discriminating the actual He confinement time from tau*(He). Active charge exchange spectroscopy is used to study the exhaust and transport of He(2+) within the plasma, and the density evolution is modelled with the diffusive/convective transport code, MIST.
Bibliographic Reference: Article: 13th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Proceedings, Vol. 3 (1991) pp. 597-604
Record Number: 199310129 / Last updated on: 1994-11-29
Original language: en
Available languages: en