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Nonlinear evolution of multi-helicity neoclassical tearing modes in the HL-2A low rotation plasmas

机译:HL-2A低旋转等离子体中多螺旋新古典撕裂模式的非线性演化

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In HL-2A, Simultaneous onset and phase locking of multi-helicity tearing modes 2/1 and 3/2 NTMs seeding by the non-axisymmetric error field are always triggered in low density (line averaged density n_e < 2×10~(19)m~(-3)) and low rotation discharges. The NTMs induced by error field penetration can be triggered in relatively low β plasmas. As the increase of plasma rotation arising from injected momentum, 2/1 island suppressed, and 3/2 island amplitude decrease. The results provide important evidence for NTMs stability predictions and their nonlinear dynamic in the low flow plasmas, such as ITER.
机译:在HL-2A中,通过非轴对称误差场的多螺旋撕裂模式2/1和3/2 NTMS播种的同时发作和相位锁定在低密度(线平均密度N_E <2×10〜(19 )M〜(-3))和低旋转放电。误差场穿透诱导的NTM可以在相对低的β等离子体中触发。随着从注入的动量产生的等离子体旋转的增加,2/1岛被抑制,3/2岛幅度降低。结果为NTMS稳定性预测及其在低流量等离子体中的非线性动态提供了重要证据,例如迭代。

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