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The first encouraging experiments demonstrating direct, explicit 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, injected in a short gas puff from the outside of the plasma, is observed to reach the plasma core, and then is readily removed from the plasma. An exhaust efficiency of about 8% is obtained. 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 a diffusive-convective transport code.

Additional information

Authors: HILLIS D L ET AL., Oak Ridge National Laboratory, Oak Ridge (US);FINKEN K H ET AL., Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);MOYER R A ET AL., University of California, Institute of Plasma and Fusion Research, Los Angeles (US);AKAISHI K, National Institute for Fusion Science, Nagoya (JP);MIYAHARA A, National Institute for Fusion Science, Nagoya (JP);HULSE R A, Princeton University, Plasma Physics Laboratory, Princeton (US)
Bibliographic Reference: Article: Physical Review Letters, Vol. 65 (1990) No. 19, pp. 2382-2385
Record Number: 199110167 / Last updated on: 1994-12-02
Original language: en
Available languages: en