Observation of an improved energy-confinement regime in neutral-beam–heated divertor discharges in the DIII-D tokamak
- 28 September 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 59 (13) , 1432-1435
- https://doi.org/10.1103/physrevlett.59.1432
Abstract
Tokamak discharges using the expanded boundary divertor in the DIII-D device exhibit H-mode confinement. With neutral-beam power up to 6 MW, energy confinement remains comparable to the Ohmic value at a plasma current of 1 MA. Confinement is also independent of plasma density and toroidal field. Confinement increases with plasma current, but the exact functional dependence is, as yet, uncertain. These results show that the H mode can be achieved in a reactor-compatible open divertor configuration.Keywords
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