An LHD Plasma with the Helical Doughnut Shape and Typical Ion Orbits in the LHD Plasma (IMAGE)

National Institutes of Natural Sciences

An LHD Plasma with the Helical Doughnut Shape and Typical Ion Orbits in the LHD Plasma

Caption

(Image 1) The passing ion (white sphere) moves in one direction. On the other hand, the trapped ion (yellow sphere) moves back-and-forth and the center of the back-and-forth motion also moves simultaneously in helical direction, which is a characteristic of the LHD. The plasma pressure is constant in each colored surface, and the plasma pressure is high in the central region.

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National Institute for Fusion Science

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