Observation of an improved energy-confinement regime in neutral-beam–heated divertor discharges in the DIII-D tokamak
Physical Review Letters1987Vol. 59(13), pp. 1432–1435
Citations Over TimeTop 1% of 1987 papers
K.H. Burrell, S. Ejima, D. P. Schissel, N. H. Brooks, R.W. Callis, T. N. Carlstrom, A.P. Colleraine, J. C. DeBoo, Hiroaki Fukumoto, R. J. Groebner, D. N. Hill, R.‐M. Hong, N. Hosogane, G.L. Jackson, G.L. Jahns, G. Janeschitz, A.G. Kellman, Jayhyun Kim, L. L. Lao, P. Lee, J. Lohr, J.L. Luxon, M. A. Mahdavi, C.P. Moeller, N. Ohyabu, T.H. Osborne, D. Overskei, P.I. Petersen, T.W. Pétrie, J. C. Phillips, R. Prater, J. T. Scoville, R. Seraydarian, M. Shimada, B. Sleaford, R. T. Snider, R.D. Stambaugh, R. D. Stav, H.E. St. John, R. E. Stockdale, E. J. Strait, T. S. Taylor, J.F. Tooker, Soichiro Yamaguchi
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.
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