Phys. Rev. Lett. 82, 1692–1695 (1999)Improved High-Confinement Mode with Neon Injection in the DIII-D TokamakReceived 19 December 1997; published in the issue dated 22 February 1999 The first observation of a high-confinement mode with reduced energy transport in both the center and the edge induced by the injection of neon impurities is reported in this paper. This improved high mode develops from an improved low-confinement mode. Linear growth rate calculations indicate that a new theoretical mechanism, the stabilization of high wave number drift waves by impurities, is at work, combined with E×B velocity shear suppression of low wave number instabilities. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.1692
DOI:
10.1103/PhysRevLett.82.1692
PACS:
52.55.Fa
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