Free and forced oscillations of a flux tube
Free and forced oscillations of a flux tube
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通量管的自由振荡和受迫振荡
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
P. R. Wilson
中科院分区：
文献类型：
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作者：
P. R. Wilson
本文研究了有限维磁通量管在等离子体中的自由振荡，等离子体相对于磁通量管作匀速运动，模型中的能量可以横向传播离开磁通量管。虽然使用细管近似得到的解产生真实的和复频率，但有效厚壁管的数值解都显示出真实的频率和虚外部波数。因此，波以恒定的振幅平行于通量管传播，并且在横向方向上是渐逝的。
The free oscillations of a magnetic flux tube of finite dimension, embedded in a nonmagnetic plasma, which may be in uniform motion relative to the tube, are studied for models in which energy may propagate laterally away from the tube. Although solutions obtained using the thin tube approximation yield both real and complex frequencies, the numerical solutions for effectively thick tubes all exhibit real frequencies and imaginary external wavenumbers. Thus the waves propagate parallel to the flux tube with constant amplitude and are evanescent in the transverse direction.