太阳风中动力论Alfven波湍流谱(b)二次激发

根据行星际Alfven湍流是由动力论Alfven波集合形成的模型理论。将行星际Alfven湍流分为三个区域:湍流耗散区、二次激发区和湍流惯性区。并对各区湍流谱的特性分别给出解释。由动力论Alfven波的二次激发和衰减,解释了太阳风高速流质子温度高于电子的事实。 

KINETIC ALFVEN WAVE RE-EXCITATION AND TURBULENCE SPECTRUM IN THE SOLAR WIND(b)

When the velocity of the solar wind is accelerated to Alfven speed vA, Landau damping of original kinetic Alfven waves subspends and the kinetic Alfven wave is excited second time. The velocity of propagation of newly excited Alfven waves with the wind is U+vA,the velocity of propagation against the wind is U-vA, the former suffers Landau damping and the latter gives Z+ mode and has no damping. The interplanetary Alfvenic turbulence is divided into three regions: dissipative region of turbulence(R<0.2AU), re-exciting region (0.2AU0.4AU), and an explanation of the turbulence spectrum features in different region is given. Based on the re-exciting and damping of the kinetic Alfven wave, the fact of higher temperature of proton in high speed stream of the solar wind is explained in this paper.