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Propagation of Chorus Waves Generated in Minimum-B Pockets
Geophysical Research Letters ( IF 5.2 ) Pub Date : 2021-12-03 , DOI: 10.1029/2021gl096478
Ning Kang 1 , Jacob Bortnik 1 , Xin An 2 , Seth G. Claudepierre 1
Affiliation  

We present the first ray tracing results of chorus waves generated in minimum-B pockets. A new ray tracer is developed to accommodate an arbitrary magnetic field model, which enables us to construct minimum-B pocket geometries using the Tsyganenko (1989) model. Rays with different frequencies and initial wave normal angles are launched from minimum-B pockets and traced under different geomagnetic activity and hot electron density conditions. Our results indicate that chorus waves generated from minimum-B pockets are usually highly localized and thus are unlikely to be detected unless the spacecraft is very close to the source region. These waves are also very unlikely to propagate into the plasmasphere. The propagation distances generally decrease with increasing geomagnetic activity.

中文翻译:

在最小 B 口袋中产生的合唱波的传播

我们展示了在最小 B 口袋中产生的合唱波的第一个光线追踪结果。开发了一种新的射线追踪器以适应任意磁场模型,这使我们能够使用 Tsyganenko (1989) 模型构建最小 B 口袋几何形状。具有不同频率和初始波法向角的射线从最小 B 口袋发射,并在不同的地磁活动和热电子密度条件下进行追踪。我们的结果表明,从最小 B 口袋产生的合唱波通常是高度局部化的,因此除非航天器非常靠近源区域,否则不太可能被检测到。这些波也不太可能传播到等离子体层中。传播距离通常随着地磁活动的增加而减少。
更新日期:2021-12-14
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