同步辐射瑞利-金斯波场对高能电子加速

Acceleration of Energetic Electrons by the Synchrotron Radiation with Rayleigh-Jeans Spectrum

由分析可知,在光学厚的介质中麦氏分布的极端相对论电子在磁场中能产生同步加速辐射,其辐射谱为瑞利-金斯谱。基于Fokker-Planck方程,这种波场对快电子的加速将产生幂律分布的电子能谱。考虑到日冕活动区的物理条件,在太阳耀斑中观测到的10 Mev左右的电子能谱很可能就是由同步加速辐射加速快电子产生的。

On the basis of analyses, it is shown that the radiation with low frequency by relativistic electrons will form Rayleigh-Jeans spectrum in optically thick medium. Using Fokker-Planck equation, we can get that the acceleration of fast electrons by the spectrum will produce the power distribution electron energy spectrum. Considering the physical conditions of coronal active region, that observed electron energy spectrum of about 10 Mev in large flare may be produced by the acceleration of the synchrotron radiation.