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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Loss of geosynchronous relativistic electrons by EMIC wave scattering under quiet geomagnetic conditions
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Loss of geosynchronous relativistic electrons by EMIC wave scattering under quiet geomagnetic conditions

机译：同步相对论电子的损失位的地磁波散射下的安静条件

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We have examined relativistic electron flux losses at geosynchronous orbit under quiet geomagnetic conditions. One 3 day period, from 11 to 13 October 2007, was chosen for analysis because geomagnetic conditions were very quiet (3 day average of K_p 2 MeV electron flux at geosynchronous orbit shows typical diurnal variations with a maximum near noon and a minimum near midnight for each day. The flux level of the daily variation significantly decreased from first day to third day for the 3 day period by a factor of >10. The total magnetic field strength (B_T) of the daily variation on the third day, however, is comparable to that on the first day. Unlike electron flux decreases, the flux of protons with energies between 0.8 and 4 MeV adiabatically responses to the daily variation of BT. That is, there is no significant decrease of the proton flux when the electron flux decreases. During the interval of quiet geomagnetic conditions, well-defined electromagnetic ion cyclotron (EMIC) waves were detected at geosynchronous spacecraft. Low-altitude polar-orbiting spacecraft observed the precipitation of energetic protons and relativistic electrons in the interval of EMIC waves enhancement. From these observations, we suggest that the EMIC waves at geosynchronous orbit cause pitch angle scattering and relativistic electron losses to the atmosphere under quiet geomagnetic conditions.
机译：我们已经检查了相对论电子通量损失在地球同步轨道下安静的地磁条件。2007年10月,被选为分析原因(3天地磁环境非常安静平均K_p 10倍。(B_T)的日变化第三天,然而,就是第一天媲美。与电子通量减少,流量质子能量介于0.8和4兆电子伏绝热地的日变化的反应BT。也就是说,没有明显降低质子通量时电子通量减少。在安静的地磁的间隔条件,定义良好的电磁离子回旋加速器(位的)波被发现同步轨道飞船。极轨卫星观测到的高能质子和降水位的相对论电子的间隔波增强。表明位的波同步螺旋角散射和轨道的原因相对论性电子损失的气氛在安静的地磁的条件下。

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