Cooling and transport of energetic ions due to the global geodesic acoustic mode |
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Authors: | YaI Kolesnichenko VV LutsenkoBS Lepiavko |
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Institution: | Institute for Nuclear Research, Prospekt Nauky 47, Kyiv 03680, Ukraine |
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Abstract: | It is shown that (i) the destabilization of global Geodesic Acoustic modes (GAM or E-GAM) by passing energetic ions in tokamaks can be accompanied with a considerable energy transfer from these ions to the mode; (ii) the mode-induced slowing down of the energetic ions leads to a radial shift outwards/inwards of the ions moving in the direction counter to/of the plasma current, in spite of the fact that the canonical angular momentum of the particles is conserved during GAMs. Some practical consequences of these phenomena are discussed. |
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Keywords: | Tokamaks Particle orbits Energetic ions Geodesic acoustic mode |
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