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Radially peaked density profiles were observed in the stellarator W7-AS in discharges with small central particle sources. Particle balance analysis and density modulation experiments revealed the existence of a convective inward particle flux. The peaked density profiles appear only in the discharges with flat central electron temperature profiles. Indischarges with peaked temperature profiles the convective inward flux is cancelled by outward direction thermodiffusion.

Additional information

Authors: MAX-PLANCK-INSTITUT FUR PLASMAPHYSIK, Max-Planck-Institut fur Plasma physik, Garching bei Munchen (DE);GARCHING BEI MUNCHEN (DE), Max-Planck-Institut fur Plasma physik, Garching bei Munchen (DE)
Bibliographic Reference: Article: Physical Review Letters, 82(1999)5, 928-931
Record Number: 199911211 / Last updated on: 1999-08-27
Original language: en
Available languages: en