Search for Ion Heating Scenarios in Burning D-T Plasmas with ICRH.
Paper in proceedings, 2011

Various ICRH scenarios relevant for the D-T phase of the JET tokamak operation are studied. It is known that an enhancement of the heating efficiency in the mode conversion regime (when the concentrations of D and T species are comparable) is possible due to the constructive interference of the reflected fast waves. Such a heating enhancement in D-T plasma is investigated first for the JET-like conditions for both dipole and +π/2 ICRH antenna phasings, and for T concentration varied from 0 to 100%. It is shown that most of the considered scenarios suffer from the parasitic absorption caused by the presence of fusion-born alpha-particles and NBI-produced fast particles. It is found that thermal ion heating becomes dominant in tritium-rich plasmas with T concentration ~80%. This scenario is compared with the alternative 3He minority ICRH scenario in D:T=50:50 plasmas.


Yevgen Kazakov

Chalmers, Applied Physics, Nuclear Engineering

V.G. Kiptily

S.E. Sharapov

D. Van Eester

Proceedings of 12th Technical Meeting on Energetic Particles in Magnetic Confinement Systems, p. P1.14

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