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Pellet injection as a possible tool for plasma performance improvement

Polevoi, A. R.*; Sugihara, Masayoshi; Takenaga, Hidenobu; Isayama, Akihiko; Oyama, Naoyuki; Loarte, A.*; Saibene, G.*; Pereverzev, G. V.*

ITER operational scenarios with the high field side pellet fuelling are considered. The possibility of reducing the energy losses per edge localised mode (ELM) to an acceptable level is discussed. Requirements on the pellet fuelling system for desirable ELM energy reduction are obtained. Self-consistent transport simulations of pellet fuelled scenarios reveal the possibility of the operation with moderate ELM losses, plasma density below Greenwald density, high energy multiplication factor Q$$sim$$20 and power across the separatrix above the L-H mode power threshold.

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Category:Physics, Fluids & Plasmas

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