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A movable multi-element Langmuir probe was implemented in TEXTOR in order to study properties of the edge and scrape-off plasma. The investigations have been focussed on the variations of plasma boundary properties in plasmas with pure ohmic heating. Special attention has been paid to the change of transport properties during the transition to a detached plasma, which occurs if the plasma density exceeds a critical value. In particular, a substantial reduction of the poloidal rotation velocity at the limiter edge and a profound change of the edge turbulence spectra and amplitudes have been observed for detached plasmas.

Additional information

Authors: BORA D, Institute for Plasma Research, Bhat, Gandhinagar (IN);FUCHS G, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);SAMM U, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);IVANOV R S, Academy of Sciences, Institute for High Temperatures, Moscow (SU);VAN OOST G, Ecole Royale Militaire, Bruxelles (BE)
Bibliographic Reference: Article: 18th European Conference on Controlled Fusion and Plasma Physics, Vol. III (1991) pp. 121-124
Record Number: 199111406 / Last updated on: 1994-12-02
Original language: en
Available languages: en