Studies of energization of magnetospheric particles by substorm dipolarizations

亚暴偶极化对磁层粒子供能的研究

• 批准号: RGPIN-2018-03988
• 负责人: Kabin, Konstantin
• 金额: $ 2.04万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=682820
• 关键词: Studies; energization; magnetospheric; particles; substorm

The goal of the proposed research is to model the fluxes of energetic particles (mostly electrons and protons) generated during substorm events. Enhanced fluxes of these particles are often observed by satellites at geostationary orbit in association with substorm dipolarizations. These particles often possess energies of hundreds of keVs and are capable of damaging satellite electronics resulting in significant economic losses for the industry. Despite many years of active research many questions regarding the energization process remain unanswered. We consider two scenarios of substrom dipolarizations: the tailward propagating edge of the transition from dipole to stretched magnetic field lines and earthward propagating electromagnetic pulse. Both scenarios lead to significant energization of the tail populations of electrons and protons and both have observational support. The first scenario is well supported by the ground-based observations, such as photometer observations of auroras and riometer observations of the ionospheric transmissivity, the second by in-situ satellite observations. Our modeling efforts will help to improve our understanding of the energization process of the charged particles and quantify their effects in the magnetosphere and ionosphere. Ultimately, we hope to be able to quantify the manifestations of the two energization scenarios both in space and in the ionosphere. This will allow us to distinguish the two and to reconcile the apparent disagreement between the ground-based and satellite observations.

拟议的研究的目的是建模在化体事件期间产生的能量颗粒（主要是电子和质子）的通量。这些颗粒的通量增强，通常是通过与替代偶极化相关的地静止轨道上的卫星观察到的。这些颗粒通常具有数百个KEV的能量，并且能够破坏卫星电子产品，从而造成该行业的巨大经济损失。尽管有多年的积极研究，许多有关通电过程的问题仍未得到解答。我们考虑了两个偶极性的两种情况：从偶极子到拉伸磁场线的过渡边缘，并向大地传播电磁脉冲。两种情况都导致电子和质子的尾部种群的显着能量，并且都具有观察性支持。第一种情况得到了基于地面的观测值，例如对电离层透射率的光度计观测值和ri仪观测值，第二个是由原位卫星观测值。我们的建模工作将有助于提高我们对带电颗粒的能量过程的理解，并量化它们在磁层和电离层中的影响。最终，我们希望能够量化太空和电离层中两个能量场景的表现。这将使我们能够区分两者并调和地面观测和卫星观测之间的明显分歧。