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Re-evaluation of ITER ion cyclotron operating scenarios

D. Van Eester, F. Louche, R. Koch2002年被引用 39Nuclear FusionIF 3出版社

Various ICRH scenarios for ITER-FEAT are evaluated. Awave propagation and damping study confirms the potential of thesecond harmonic tritium heating scenario for both heating and current drive purposes. The fundamental deuterium heating schemeis dominated by beryllium and alpha particle absorption. Owingto the reduced ITER size, the low frequency current drive windowis lost in practice. A 3He minority greatly enhances theperformance. In the early stage of the discharge, the powerabsorbed by the 3He is transferred to the background ions but,later on, the power of the fast particles (from both the 3Heand the tritium tails) is roughly equally distributed betweenelectrons and ions. Using the experimentally establishedexpression for the L to H mode threshold, it is found that the Hmode regime can always be reached using RF heating. To achieveQ = 10, high density operation is required. Minority currentdrive competes with heating and with electron current drive. Thescenarios foreseen for the non-activated ITER-FEAT phase arealso discussed.

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