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The influence of the rotating field and the driven current on confinement in the rotamak

G A Collins, G Durance, J Tendys1989年Plasma Physics and Controlled FusionIF 2.2出版社

A range of rotating field amplitudes, driven currents and filling pressures is explored in the ANSTO rotamak (vessel diameter 28 cm, Itor<2.5 kA, Pr.f<60 kW, ne=2-8*1012 cm-3, Te=10-15 eV). The relationships between the externally controlled variables and their effect on the plasma parameters are investigated. Although the rotating field is responsible for creating and maintaining the rotamak configuration, its amplitude is seen to have little effect on many of the plasma parameters. The temperature and density, near the magnetic axis, and the particle confinement time are observed to scale mainly with the driven current, even though the same current can be achieved with a range of rotating field amplitudes and r.f. input powers. However, the details of the equilibrium magnetic field configuration do depend on the rotating field. This dependence is reflected by the r.f. power which is sensitive to the position of the separatrix in relation to the vessel wall.

日本語訳

ANSTOロータマク(容器直径28 cm、Itor<2.5 kA、Pr.f<60 kW、ne=2-8×10¹² cm⁻³、Te=10-15 eV)において、回転磁界振幅、駆動電流、充填圧力の範囲が探求されている。外部制御変数とそれらがプラズマパラメータに及ぼす影響との関係が調査されている。回転磁界はロータマク配位の生成と維持に関与しているが、その振幅は多くのプラズマパラメータにほとんど影響を及ぼさないことが観察される。磁気軸近傍の温度と密度、および粒子閉じ込め時間は、主に駆動電流に応じてスケーリングすることが観察されるが、同じ電流は様々な回転磁界振幅と高周波入力電力で達成可能である。しかしながら、平衡磁界配位の詳細は回転磁界に依存する。この依存性は、容器壁に対するセパラトリックスの位置に敏感な高周波電力に反映される。

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