AI 中文总结
该研究通过双流体模拟发现，反场箍缩（RFP）等离子体的双流体效应会引发独特锯齿振荡，霍尔介导的能量重分配导致稳态通量泵浦向准周期锯齿弛豫的动力学分岔。
AI 中文摘要
本研究探究反场箍缩（RFP）等离子体磁弛豫过程中双流体效应的作用。在多螺旋度（MH） regime 下，双流体模拟产生独特的锯齿振荡，而单流体模拟则得到无锯齿状态。对法拉第定律沿磁场投影的分析显示，撕裂模共同产生维持磁弛豫的发电机电场，该过程与托卡马克中的通量泵浦类似。尽管线性撕裂模增长率降低，但在考虑的参数范围内，更强的双流体效应会产生更显著的锯齿活动。模态能量分析表明，霍尔介导的非线性能量重分配破坏了维持稳态通量泵浦所需的相干撕裂模动力学，从而促进间歇性重联，该转变被解释为霍尔介导的稳态通量泵浦与准周期锯齿弛豫之间的动力学分岔。
英文摘要
This study investigates the role of two-fluid effects during magnetic relaxation in reversed-field pinch (RFP) plasmas. Within the multiple-helicity (MH) regime, two-fluid simulations produce distinct sawtooth oscillations, in contrast to the sawtooth-free state obtained in single-fluid simulations. Analysis of the magnetic field aligned projection of Faraday's law reveals that, tearing modes collectively generate a dynamo electric field that sustains the magnetic relaxation, a process analogous to the flux-pumping in tokamaks. Despite the reduced linear tearing-mode growth rates, stronger two-fluid effects produce more pronounced sawtooth activity over the parameter range considered. Modal energy analysis shows that Hall-mediated nonlinear energy redistribution disrupts the coherent tearing-mode dynamics required to sustain steady flux-pumping, thereby facilitating intermittent reconnection. This transition is interpreted as a Hall-mediated dynamical bifurcation between steady flux-pumping and quasi-periodic sawtooth relaxation.
