内部導体をもつヘリオトロン磁場によるプラズマ閉じ込めの提案

概要

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The plasma confinement by the Heliotron magnetic field with helical or poloidal inner conductors is proposed. This field forms a magnetic well of the potential, Ti =-∫dl/B, and the bottom of the potential well is in the region near the separatrix. When the plasma fills up the region inside maximum U surface, the plasma is stable for flute instability. The plasma inside separatrix is stable as far as the region just outside the separatrix is filled up by plasma. It is important that the plasma inside the separatrix is stable and it does not contact with the supporters of the inner conductors. The Plasaa outside the separatrix will be lost gradually due to the supporter loss. When the plasma density just outside the separatrix becomessufficiently low, the plasma inside the separatrix starts to leak out from the region inside the separatrix due to instability. Therefore, if we compensate the plasma loss due to the supporter by gun plasma injection or other means and keep the Plasma density just outside the separatrix constant, the plasma inside theseparatrix will be confined stably and theconfinement time will be extended considerably. The substitution of the old plasma by the newly injected plasma will take place only in the region outside, the separatrix. but not inside the separatrix.
社団法人プラズマ・核融合学会の論文