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Formation of closed flux surfaces in spheromaks sustained by steady inductive helicity injection

Kyle Morgan, Thomas Jarboe, Cihan Akcay2019年被引用 5Nuclear FusionIF 3出版社

The helicity injected torus with steady inductive helicity injection device is a simply-connected toroidal device that forms and sustains axisymmetric spheromak equilibria through the use of steady inductive helicity injection, which inject magnetic helicity through the inductive drive of non-axisymmetric currents on the edge of the plasma. Simulations of high-gain scenarios, using the NIMROD code and based on models validated with low gain experimental operations, indicate the formation of closed flux surfaces at current amplifications of six. Despite the helicity injection scheme adding magnetic perturbations of order , these closed flux equilibria are able to persist for as long as 20 injector periods (1.3 ms) before breaking apart due to other plasma generated instabilities.

日本語訳

ヘリシティ注入トーラスは、定常インダクティブヘリシティ注入装置を備えた単連結トーラス状の装置であり、非軸対称電流のインダクティブ駆動による定常インダクティブヘリシティ注入を用いて、軸対称スフェロマック平衡を形成・維持する。NIMRODコードを用いた高利得シナリオのシミュレーションは、低利得実験運転で検証されたモデルに基づいており、電流増幅率6において閉じた磁気面の形成を示している。ヘリシティ注入方式は次数の磁気摂動を付加するにもかかわらず、これらの閉じた磁気面平衡は、他のプラズマ生成不安定性によって破壊されるまで、20インジェクター周期(1.3 ms)もの間持続することができる。

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Helicity injection
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