Improved plasma performance in TEXTOR with silicon coated surfaces

J. Winter, H. G. Esser, G. L. Jackson, L. Könen, A. Messiaen, J. Ongena, V. Philipps, A. Pospiesczcyk, U. Samm, B. Schweer, B. Unterberg

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)1549-1552
Number of pages4
JournalPhysical Review Letters
Volume71
Issue number10
DOIs
Publication statusPublished - 1993

Fingerprint

Dive into the research topics of 'Improved plasma performance in TEXTOR with silicon coated surfaces'. Together they form a unique fingerprint.

Cite this