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Data-validated, Self-consistent Modelling of Turbulence and Particle Transport in the Heliosphere

经过数据验证、自洽的日光层湍流和粒子输运建模

基本信息

批准号：
221245396
负责人：
Privatdozent Dr. Horst Fichtner
金额：
--
依托单位：
Institut für Theoretische Physik IV: Weltraum- und Astrophysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/221245396?language=en
关键词：
Data validated Self consistent Modelling

项目摘要

With the proposed 3-year research project we intend to continue the successful collaboration between the research groups of the two applicants H. Fichtner (Ruhr-Universitaet Bochum) and B. Heber (Christian-Albrechts-Universitaet zu Kiel) with M.S. Potgieter (North-West University, Campus Potchefstroom, South Africa) on the topic of `particle transport in heliospheric magnetic field structures'. The research is still very timely in view of the upcoming space missions Solar Orbiter, Solar Probe Plus (to be launched in 2018), and THOR (2026) that will observe energetic particles and the solar wind plasma. A key for a comprehensive understanding of the expected measurements will be the simultaneous modelling of turbulence in the dynamic plasma and of energetic particle transport. In improvement of previous approaches we will, for the first time, apply a model suite being self-consistent as far as possible and featuring the novel aspects of detailed comparisons with three-dimensional multi-point spacecraft data, realistic inner (solar) boundary conditions, and an explicit consideration of the slab and quasi-two-dimensional components of the fluctuations of the heliospheric magnetic field. This will enable us to address the following central science question: can current combined state-of-the-art kinetic transport, magnetohydrodynamic, and turbulence evolution models be used to explain time-dependent, three-dimensional multi-point spacecraft data? In order to answer this question we will, on the one hand, model the energetic particle transport simultaneously with the solar wind dynamics and the turbulence evolution in transient as well as recurrent structures using high-resolution magnetic field and plasma measurements as input. On the other hand, we will investigate particular periods of spacecraft measurements of transient and recurrent structures as well as solar energetic particle events during different phases of the solar activity cycle in order to validate the suite of combined models and to constrain model parameters. This way, we will determine the transport models and their parameters that allow to explain energetic particle data from different spacecraft and define criteria for their plausibility.

通过拟议的3年研究项目，我们打算继续两个申请人H的研究小组之间的成功合作。Fichtner（Ruhr-Universitaet波鸿）和B. Heber（Christian-Albrechts-Universitaet zu基尔），理学硕士Potgieter（南非西北大学波切夫斯特鲁姆校区），题目是“日光层磁场结构中的粒子输运”。考虑到即将到来的太阳轨道器，太阳探测器+（将于2018年发射）和雷神（2026年）的太空任务，这项研究仍然非常及时，这些任务将观测高能粒子和太阳风等离子体。一个关键的全面了解预期的测量将是在动态等离子体和高能粒子运输的湍流的同时建模。在改进以前的方法，我们将首次应用一个模型套件是自洽的，尽可能具有详细的比较与三维多点航天器数据，现实的内（太阳）边界条件，并明确考虑板和准二维分量的日光层磁场的波动的新方面。这将使我们能够解决以下核心科学问题：目前结合国家的最先进的动力学运输，磁流体动力学和湍流演化模型可以用来解释时间依赖性，三维多点航天器数据？为了回答这个问题，我们将，一方面，模型的高能粒子运输同时与太阳风动力学和湍流演变的瞬态和经常性的结构，使用高分辨率的磁场和等离子体测量作为输入。另一方面，我们将调查特定时期的航天器测量的瞬态和经常性的结构，以及太阳高能粒子事件在不同阶段的太阳活动周期，以验证该套件的组合模型和约束模型参数。通过这种方式，我们将确定传输模型及其参数，以解释来自不同航天器的高能粒子数据，并定义其可解释性的标准。