Heating and flow drive by low frequency waves in high beta plasmas

在磁约束等离子体并合过程中，磁场重联在高β区激发出低频波。这些波部分地有助于从磁能到离子热能的转换。当重联中包含垂直于重联磁场的有效引导磁场时，将激发出单调的大振幅运动Alven波。然而，这些波不是提供所观察到的离子加热的主导因素。另一方面，当不存在导场时，则在全局范围内激发出极低频波。这些剪切阿尔芬波直接驱动离子流，并最终提供从磁场到离子热能的转换。结果表明，这些极低频波适用于高β等离子体的加热方法。

Low frequency waves are excited in the high beta region of magnetically confined plasmas by magnetic reconnection during plasma merging process. These waves partly contribute to the conversion from magnetic energy to ion thermal energy. When the reconnection includes significant guide magnetic field perpendicular to the reconnection magnetic field, monotonic large-amplitude waves are excited as kinetic Alven waves. However, these waves are not dominant factors providing the observed ion heating. On the other hand, when there is no guide field, very low fewquency waves are globally excited. These shear Alfven waves directly drive ion flows and eventually provide conversion from magnetic to ion thermal energy. It is concluded that these very low frequency waves work for the heating method for high beta plasmas.