Improved plasma performance in TEXTOR with silicon coated surfaces
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/a greater than or equal to 0.75 and decreases with increasing plasma density. Density limits are enhanced by 30 % as compared with boronised conditions; large density gradients and low electron temperatures at the edge (less than 10 eV) are obtained. The improved confinement regimes observed previously at low densities (1.7 x ITER L 89-P scaling) were extended to significantly higher densities in spite of a high radiative power fraction.
Bibliographic Reference: Article: Physical Review Letters, Vol. 71 (1993) No. 10, pp. 1549-1552
Record Number: 199311258 / Last updated on: 1994-11-29
Original language: en
Available languages: en