Profile optimization and high beta discharges, and stability of high elongation plasmas in the DIII-D Tokamak

T. S. Taylor, E. A. Lazarus, M. S. Chu, J. R. Ferron, F. J. Helton, W. Howi, G. L. Jackson, T. H. Jensen, Y. Kamada, A. G. Kellman, L. L. Lao, R. J. La Haye, J. A. Leuer, J. B. Lister, T. H. Osborne, R. Snider

Research output: Chapter in Book/Report/Conference proceedingConference contribution

25 Citations (Scopus)

Abstract

The maximum experimental volume averaged toroidal beta in DIII-D scales with the plasma current divided by the plasma minor radius and the toroidal field, βT ∝ I/aB. βT = 11% has been achieved at high normalized current by operating at high plasma elongation. κ = 2.3, and high triangularity, δ = 0.8, near the axisymmetric stability limit. In a limited range of I/aB, βT (%) = 5I/aB (MA/m/T) has been obtained. Stability calculations indicate that the high beta stability limit depends on the profiles of the current density and the pressure.

Original languageEnglish
Title of host publicationProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res
PublisherPubl by IAEA
Pages177-194
Number of pages18
ISBN (Print)9201300913
Publication statusPublished - 1991 Jan 1

Publication series

NameProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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