Internal Transport Barriers in JET Deuterium-Tritium Plasmas

C. Gormezano; Y. F. Baranov; C. D. Challis; I. Coffey; G. A. Cottrell; A. C. Ekedahl; C. M. Greenfield; A. C. Howman; G. T. A. Huysmans; M. Keilhacker; X. Litaudon; T. C. Luce; B. W. Rice; F. Rochard; G. J. Sadler; P. A. J. Schild; A. C. C. Sips; F. X. Söldner; E. J. Strait; B. J. D. Tubbing; M. R. Wade; D. J. Ward

doi:10.1103/PhysRevLett.80.5544

Internal Transport Barriers in JET Deuterium-Tritium Plasmas

C. Gormezano, Y. F. Baranov, C. D. Challis, I. Coffey, G. A. Cottrell, A. C. Ekedahl, C. M. Greenfield, A. C. Howman, G. T. A. Huysmans, M. Keilhacker, X. Litaudon, T. C. Luce, B. W. Rice, F. Rochard, G. J. Sadler, P. A. J. Schild, A. C. C. Sips, F. X. Söldner, E. J. Strait, B. J. D. Tubbing, M. R. Wade, and D. J. Ward

Phys. Rev. Lett. 80, 5544 – Published 22 June 1998

Abstract

The observation of internal transport barriers (ITBs) in which ion thermal diffusivity is reduced to a neoclassical level has been made for the first time in tokamak plasmas fueled with deuterium and tritium ions using a broad current density profile. The heating and current profiles required to obtain an ITB are similar in D-T and D-D plasmas. Central ion temperatures of 40 keV and plasma pressure gradients of $10^{6} Pa / m$ were observed in a D-T plasma, leading to a fusion triple product $n_{i} T_{i} τ_{E} {= 1.10}^{21} m^{- 3} keV s$ and 8.2 MW of fusion power. There is potential for further optimization as a step towards the development of efficient tokamak fusion reactors.

Received 21 January 1998

DOI:https://doi.org/10.1103/PhysRevLett.80.5544

Authors & Affiliations

C. Gormezano, Y. F. Baranov, C. D. Challis, I. Coffey, G. A. Cottrell, A. C. Ekedahl^*, C. M. Greenfield^†, A. C. Howman, G. T. A. Huysmans, M. Keilhacker, X. Litaudon^‡, T. C. Luce^§, B. W. Rice^∥, F. Rochard^¶, G. J. Sadler, P. A. J. Schild, A. C. C. Sips, F. X. Söldner, E. J. Strait^**, B. J. D. Tubbing, M. R. Wade^††, and D. J. Ward

JET Joint Undertaking, Abingdon, Oxfordshire, OX14 3EA, United Kingdom

^*Permanent address: Chalmers University, Gothenburg Sweden.
^†Permanent address: General Atomics, San Diego, CA 92186.
^‡Permanent address: CEA, Cadarache, France.
^§
^∥Permanent address: Lawrence Livermore National Laboratory, Livermore, CA 94551.
^¶
^**
^††Permanent address: Oak Ridge National Laboratory, Oak Ridge, TN 37831.