Chronology of 'killer' electrons: Solar cycles 22 and 23
Chronology of 'killer' electrons: Solar cycles 22 and 23
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“杀手”电子的年表：太阳周期 22 和 23
DOI：
10.1016/j.jastp.2008.08.002
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发表时间：
2009
影响因子：
1.9
通讯作者：
G. Wrenn
中科院分区：
文献类型：
--
作者：
G. Wrenn
从1986年到2007年对GOES卫星上2 MeV电子的测量被用来建立外辐射带增强的图形年表。用卡林顿旋转对L=6.6当量通量的逐日值进行颜色编码和排序，以说明两个太阳活动周期中发生频率和强度的模式，并对比重现和非重现事件的形式。重点是与高太阳风速和向南的行星际磁场有关，这显然是充电过程的关键，在生长阶段诱导高水平的地磁活动。该年表作为具体事件案例研究的简单背景参考，这些案例研究对于了解导致这些相对论电子的产生和动力学以及由此产生的内部静电放电对航天器系统的威胁的物理过程是必要的。现在可以改进这种威胁的太阳周期变化的经验模型。
Measurements of >2MeV electrons on GOES satellites from 1986 to 2007 are used to build a graphic chronology of outer radiation belt enhancements. Daily values of L=6.6 equivalent flux are colour coded and ordered by Carrington rotation to illustrate the pattern of occurrence frequency and intensity through the two solar cycles, and to contrast the form of recurrent and non-recurrent events. Highlighted are associations with high solar wind speed and southward interplanetary magnetic field that are clearly key to the energisation process, inducing high levels of geomagnetic activity during the growth phase. The chronology is offered as a simple background reference for the specific event case studies that are needed to understand the physical processes responsible for the production and dynamics of these relativistic electrons and their consequent internal electrostatic discharge threat to spacecraft systems. It is now possible to refine an empirical model for the solar cycle variation of this threat.