Alfven波对日冕的随机湍动加热

TURBULENCE STOCHASTIC HEATING OF CORONA BY ALFVEN WAVES

来自太阳光球层的Alfven波沿着日冕环的拱形磁感线两足向上传播，在冕环的顶部两反向传播的波相遇，强烈的不稳定性可能激发起等离子体湍动．Alfven波的能量可能转移给快磁声波并衰减和耗散，在一定条件下可以形成无碰撞波；当粒子的热速度接近于无碰撞波的相速度时，可以通过朗道阻尼引起的无碰撞随机湍动加热，使日冕等离子体湍动区的温度迅速上升，对日冕平均温度的增加有一定的贡献，是日冕快速加热的重要机制．

Alfven waves propagate to go to a top of coronal loop by the photoshere along both feet of arch magnetic line of force. Alfven waves by opposite direction run into the top of coronal loop and a plasma turbulence can be exed for a strong instability reason. Alfven wave energy can be transfered into megnetosonic waves and can be attenuted and dissipated.Under certain conditions may create collisiouless waves, when the thermal velocity of particles is close to the phase velocity of collisionless waves, the tempereture in turbulence region will sharply be increased by the collisionless turbulence stochastic heating caused by Landau damping. It has a certain contribution for coronal mean tempetature. It is an important mechanism for corona in rapidly heating.