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An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria

D.W. Swain, G.H. Neilson1982年被引用 166Nuclear FusionIF 3出版社

A method for determining plasma shape and global properties of high-beta non-circular tokamak equilibria (βp, β, q and ℓi) from magnetic sensor data is described. The technique uses a least-squares fitting procedure to find the plasma boundary and a global force balance analysis (as opposed to a complete solution of the MHD equilibrium equation) to determine plasma pressure. Estimates of the uncertainties in the computed quantities are also obtained, and the method is fast enough that it can be used to provide a complete time history (up to 100 time points) of ISX-B high-beta discharges within two to three minutes of each shot. Values obtained using this method are in excellent agreement with more detailed measurements and with free-boundary MHD equilibrium computations.

日本語訳

高ベータ非円形トカマク平衡(βp、β、qおよびℓi)のプラズマ形状と全体特性を磁気センサーデータから決定する方法について述べる。この手法は、最小二乗フィッティング手順を用いてプラズマ境界を求め、プラズマ圧力を決定するために(MHD平衡方程式の完全な解法ではなく)全体の力のバランス解析を用いる。計算された量の不確かさの推定値も得られ、この方法は各ショットから2〜3分以内にISX-B高ベータ放電の完全な時間履歴(最大100の時間点)を提供するのに十分な速さである。この方法を用いて得られた値は、より詳細な測定および自由境界MHD平衡計算と非常によく一致する。

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Tokamak equilibria
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