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An equilibrium model for helicity injector operation in the helicity injected tokamak (HIT) experiment

A K Martin, T R Jarboe1996年Plasma Physics and Controlled FusionIF 2.2出版社

The helicity injected tokamak (HIT) experiment uses coaxial helicity injection to drive current in a low aspect-ratio tokamak. In order to accurately calculate the equilibria of such objects, a model which includes the essential physics of the injector and edge region must be included. Such a model is also crucial in determining the performance of future helicity injector designs. We present a model for the helicity injector that treats the open field lines as being in a force-free equilibrium determined by the field line length, the applied injector voltage, and an effective resistivity , which can have both resistive and dynamic components. This model agrees well with data for plasmas with little or no closed flux, using a uniform as the fitting parameter.

日本語訳

ヘリシティ入射トカマク(HIT)実験は、同軸ヘリシティ入射を用いて低アスペクト比トカマクに電流を駆動する。このような装置の平衡状態を正確に計算するためには、入射器および周辺領域の本質的な物理を含むモデルが必要である。このようなモデルはまた、将来のヘリシティ入射器設計の性能を決定する上でも重要である。我々は、開放磁力線が、磁力線長、印加入射器電圧、および実効抵抗率によって決定される力のない平衡状態にあるものとして扱う、ヘリシティ入射器のモデルを提示する。ここで実効抵抗率は、抵抗性成分と動的成分の両方を持ち得る。このモデルは、一様な抵抗率をフィッティングパラメータとして用いることで、閉じた磁束がほとんどないプラズマの実験データとよく一致する。

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