Fueling of magnetic confinement devices

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Abstract
A general overview of the fueling of magnetic confinementdevices is presented, with particular emphasis on recent experimental results. Various practical fueling mechanisms are considered, such as cold gas inlet (or plasma edge fueling), neutral beam injection, and injection of high speed cryogenic hydrogen pellets. The central role played by charged particle transport and recycle of plasma particles from material surfaces in contact with the plasma is discussed briefly. The various aspects of hydrogen pellet injection are treated in detail, including applications to the production of high purity start‐up plasmas for stellarators and other devices, refueling of tokamakplasmas, pellet ablation theory, and the technology and performance characteristics of low and high speed pellet injectors.

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