Nonlinearities in space and astrophysical plasmas generate a set of magnetic filaments or bundles that have an incompressible sense of fluctuations and propagate highly obliquely to the mean magnetic field. Those filaments are caused by wave–wave interactions in which a large-amplitude Alfvén wave (or pump Alfvén wave) is disturbed by thermal, density fluctuations and collapses into obliquely propagating Alfvén waves at shorter wavelengths than the pump. Hybrid simulations confirm the filament excitations in the three-dimensional low-beta plasma. Alfvén waves develop into magnetic filaments on a time scale of about 300 ion gyrations. The filaments grow in a multi-channel way at various azimuthal angles around the mean magnetic field.

中文翻译：

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阿尔文波在 3-D 空间等离子体中演化为磁丝

空间和天体物理等离子体中的非线性会产生一组磁丝或磁束，这些磁丝或磁束具有不可压缩的波动感，并与平均磁场高度倾斜地传播。这些细丝是由波-波相互作用引起的，其中大振幅阿尔文波（或泵浦阿尔文波）受到热、密度波动的干扰，并坍缩成比泵浦波长更短的倾斜传播的阿尔文波。混合模拟证实了三维低 β 等离子体中的灯丝激发。阿尔文波在大约 300 次离子旋转的时间尺度上发展成磁丝。细丝以围绕平均磁场的不同方位角以多通道方式生长。