Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, 35127 Padova, Italy.
Phys Rev Lett. 2013 Aug 23;111(8):085002. doi: 10.1103/PhysRevLett.111.085002. Epub 2013 Aug 21.
We report the first nonlinear three-dimensional magnetohydrodynamic (MHD) numerical simulations of the reversed-field pinch (RFP) that exhibit a systematic repetition of quasisingle helicity states with the same dominant mode in between reconnection events. This distinctive feature of experimental self-organized helical RFP plasmas is reproduced in MHD simulations at low dissipation by allowing a helical modulation of the plasma magnetic boundary similar to the experimental one. Realistic mode amplitudes and magnetic topology are also found.
我们报告了首例非线性三维磁流体力学（MHD）反转场箍缩（RFP）数值模拟，其中在重联事件之间存在具有相同主导模式的准单螺旋度状态的系统重复。通过允许等离子体磁边界的螺旋调制类似于实验中的情况，在低耗散的 MHD 模拟中再现了实验自组织螺旋 RFP 等离子体的这一独特特征。还发现了实际的模式幅度和磁拓扑。
