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Abstract

The observation of internal transport barriers (ITB) in which ion thermal diffusivity is reduced to its neo-classical level has been made for the first time in tokamak plasmas fuelled with deuterium and tritium (D-T) ions using a broad or hollow current density profile. The heating and the current profile required to obtain an ITB are similar in D-T and in D-D plasmas. Central ion temperatures close to 40 keV, ion temperature gradients of 150 keV/m and plasma pressure gradients of 1E6Pam{-1} were observed in D-T leading to a fusion triple product n(i)T(i)tau(E) = 1E21m{-3}keVs and 8.2 MW of fusion power. There is potential for further optimization which may prove to be an important step towards the development of efficient tokamak fusion reactors.

Additional information

Authors: GORMEZANO C ET AL, JET Joint Undertaking, Abingdon, Oxon (GB);EKEDAHL A C, Chalmers University, Gothenburg (SE);GREENFIELD C M ET AL, General Atomics, San Diego (US);LITAUDON X ET AL, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);RICE B W, Lawrence Livermore National Laboratory (US);WADE M R, Oak Ridge National Laboratory (US)
Bibliographic Reference: Report: JET-P(98)23 EN (1998) 6pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199811097 / Last updated on: 1998-09-28
Category: PUBLICATION
Original language: en
Available languages: en