Strongly radiating type-III ELMy H-mode in JET – an integrated scenario for ITER

As solution to the problems of transient and steady state energy exhaust the type-III ELMy H-mode is proposed. In recent experiments at JET it has been demonstrated that with seeding of nitrogen a radiative power fraction of 95% can be achieved, reducing the steady state and transient heat flux to acceptable values. Though the confinement of these discharges is reduced as well. Nevertheless, the ITER operational domain for Q = 10 does foresee operation at confinement enhancement factors Of H-98(y2) approximate to 0.78 at higher plasma currents (I-p = 17 MA). It has been demonstrated at JET that an integrated scenario with type-III ELMs is feasible. (c) 2004 Elsevier B.V. All rights reserved.