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Special versions of the 1.5-D BALDUR predictive transport code are used to explore the confinement in the ignited ITER EDA by self-consistent calculations. The code computes 2-D equilibria and solves 1-D transport equations in the bulk and scrape-off layer with empirical transport coefficients for the ohmic, L and ELMy H mode regimes. The emphasis is on scenarios with flat density profiles and high, fixed radiative power in the main chamber due to the seeded impurities argon and neon. It is shown that self-sustained steady state thermonuclear burn is achieved for 370 s and is compatible with the flat density profiles and strong radiative cooling. The advantage of neon originates from its smaller radiative loss within the separatrix of 37 % of the total radiation in the main chamber, compared with 60 % in the case of argon. In the steady state, a helium fraction of 5 % is computed. The fractions of helium, argon and neon and the resulting fuel dilution are considerably lower than with peaked density profiles.

Additional information

Authors: BECKER G, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Nuclear Fusion, Vol. 35 (1995) No. 8, pp. 969-980
Record Number: 199511204 / Last updated on: 1995-10-10
Original language: en
Available languages: en