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An important goal of the Tore Supra programme is long pulse operation and associated physics issues. Discharges up to 67 s at a current of 1 MA and a central density of 3.5 x 1.0 E19/m3 were achieved using lower hybrid current drive at a level of 2.5 MW during 62 s with the plasma leaning on the inner wall. Another scenario of plasma-wall interaction which allows active particle control is in progress based on the use of pump limiters. These components were tested with power fluxes up to 10 MW/m2 and a single limiter allowed pumping of 5% of the recycled flux. In parallel, the ergodic divertor behaviour was extensively studied in ohmic conditions and showed interesting potentialities for particle control, impurity screening and disruption avoidance. Plasma heating and confinement were also investigated using lower hybrid and ion cyclotron waves. A series of experiments showed that current profile control (with LHCD in this case) leads to improvement of the energy confinement.

Additional information

Authors: EQUIPE TORE SUPRA, Equipe Tore Supra
Bibliographic Reference: Paper presented: 14th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Würzburg (DE), September 30 - October 7, 1992
Availability: Available from (1) as Paper EN 37036 ORA
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