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(THP2/27) Self-Consistent Modelling of ICRH

T. Hellsten¹⁾, J. Hedin¹⁾, T. Johnson¹⁾, M. Laxåback¹⁾, E. Tennfors^1)
 
1) Division of Fusion Plasma Physics, Alfvén Laboratory, Royal Institute of Technology, SE-100 44 STOCKHOLM, Sweden, Association EURATOM/NFR

Abstract.  The performance of ICRH is often sensitive to the shape of the high energy part of the distribution functions of the resonating species. This requires self-consistent calculations of the distribution functions and the wave-field. In addition to the wave-particle inte ractions and Coulomb collisions the effects of the finite orbit width and the RF-induced spatial transport are found to be important. The inward drift dominates in general even for a symmetric toroidal wave spectrum in the centre of the plasma. An inward drift does not necessarily produce a more peaked heating profile. On the contrary, for low concentrations of hydrogen minority in deuterium plasmas it can even give rise to broader profiles.

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