Abstract
Coating of the walls of TEXTOR with silicon has led to improved tokamak plasma performance. Very low concentrations of C, B, and O are measured. Radiation from silicon is located at the plasma periphery at r/a0.75 and decreases with increasing plasma density. Density limits are enhanced by 30% as compared to boronized conditions; large density gradients and low electron temperatures at the edge (<10 eV) are obtained. The improved confinement regimes observed earlier at low densities [τE=1.7×ITER L 89-P International Thermonuclear Experimental Reactor)] were extended to significantly higher densities in spite of a high radiative power fraction.
Original language | English |
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Pages (from-to) | 1549-1552 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 71 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1993 |