(FT/P2-30) Focused Neutral Beams with Low Chaotic Divergence for Plasma Heating and Diagnostics in Magnetic Fusion Devices

A.A. Ivanov1), V.I. Davydenko1), P.P. Deichuli1), V.P. Belov1), V.V. Kobets1), V.V. Mishagin1), I.V. Shikhovtsev1), A.V. Sorokin1), A.V. Stupishin1), B. Schweer2), R. Uhlemann2)
1) Budker Institute of Nuclear Physics, Novosibirsk, Russian Federation
2) Trilateral Euregio Cluster, Institut fur Plasmaphysik, Forschungszentrum Juelich GmbH, Association EURATOM-KFA, Juelich, Germany

Abstract.  A series of neutral beam injectors has been developed in the Budker Institute of Nuclear Physics for plasma heating and diagnostics in modern fusion devices. Ion optical system of these injectors is optimized to produce ion beams with low angular divergence. In order to provide beam focusing, the grids are formed to be spherical segments. Such geometrically focused neutral beams are particularly advantageous for plasma diagnostics when high spatial resolution is required. Another application of these beams is plasma heating in the machines with narrow ports through which only small size, high power density beams can be transported.

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