Ideal MHD Stability of ITER Steady State Scenarios with ITBs
Authors: F.M. Poli, C.E. Kessel, S. Jardin, J. Manickam, M. Chance, J. Chen
Abstract:
One of ITER goals is to demonstrate feasibility of continuous operations using non-inductive
current drive. Two main candidates have been identified for advanced operations: the long duration,
high neutron fluency hybrid scenario and the steady state scenario, both operating at a
plasma current lower than the reference ELMy scenario [1][2] to minimize the required current
drive. The steady state scenario targets plasmas with current 7-10 MA in the flat-top, 50%
of which will be provided by the self-generated, pressure-driven bootstrap current. It has been
estimated that, in order to obtain a fusion gain Q > 5 at a current of 9 MA, it should be ΒN > 2.5
and H > 1.5 [3]. This implies the presence of an Internal Transport Barrier (ITB). This work
discusses how the stability of steady state scenarios with ITBs is affected by the external heating
sources and by perturbations of the equilibrium profiles.
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Presented at: 38th European Physical Society Conferene on Plasma Physics, Strasbourg, France (June 2011)
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Download PPPL-4650 (pdf 353 KB 4 pp)
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