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The phenomenology of reconnection events in the reversed field pinch

B. Momo, H. Isliker, R. Cavazzana, M. Zuin, L. Cordaro, D. Lopez-Bruna, E. Martines, I. Predebon, C. Rea, M. Spolaore2020年被引用 7Nuclear FusionIF 3出版社

The phenomenology of reconnection events, associated to relaxations in high-current (∼1.5 MA) plasmas of the reversed-field pinch device RFX–mod, is shown. Each relaxation event can be described as a series of stages starting in the core and propagating towards the plasma edge. In an initial stage (trigger), the evolution of the q profile brings resonant layers closer together, allowing for an interaction of the current sheets associated to tearing modes at the respective rational values of q. The phase locking of the resonant modes then initiates the reconnection process that, once started, changes the magnetic topology bringing the initially helical state to a more chaotic configuration.

日本語訳

逆転磁場ピンチ装置RFX-modの高電流(∼1.5 MA)プラズマにおける緩和現象に伴うリコネクション事象の現象論を示す。各緩和現象は、コアから始まりプラズマ端へと伝播する一連の段階として記述できる。初期段階(トリガー)では、qプロファイルの時間発展により共鳴層が互いに接近し、それぞれの有理q値におけるテアリングモードに付随する電流シートの相互作用が可能となる。その後、共鳴モードの位相ロックがリコネクション過程を開始し、ひとたび開始されると磁気トポロジーが変化し、初期のヘリカル状態からよりカオス的な配位へと遷移する。

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Reversed field pinchMagnetic reconnection
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