CAREER: Studies of 3D Dynamics in the Global Magnetosphere Using High-performance Heterogeneous Computing Architectures

这是一个跨学科的项目，目的是开发新版本的OpenGGCM(开放地球空间环流模型)磁流体动力学(MHD)代码，该代码将在各种计算环境中高效运行。MHD程序将包括广义欧姆定律和霍尔项，以使其能够准确地模拟磁重联以及薄电流片中的等离子体不稳定性。该程序将被用来研究霍尔物理和二次不稳定对3D重联和白天通量传输事件(FTE)的产生以及对夜间亚暴爆发的影响。该项目还将研究地球附近不断膨胀的不稳定性和尾部中部磁场重联之间的相互作用。该项目将开发和利用一种自动计算机代码生成工具，使用户能够创建适合特定计算机体系结构的源代码。除了使用这一代码检查磁层物理外，该项目还将使代码生成工具成为一个开放源码工具包，它将广泛适用于以模板计算为基础的科学应用。薄电流片的磁重联和二次不稳定对于了解地球全球磁层和空间天气的动力学至关重要。将现实物理学纳入全球磁层编码并加以理解，是模拟和预报空间天气的重要一步。将开发的计算方法适用于科学和工程中涉及求解偏微分方程组的广泛应用。该提案还包含广泛的教育内容。它包括课程改进和创建夏季研讨会系列，以在UNH形成一个针对研究生、博士后和教职员工的计算社区。还将开发一个基于PlayStation-3的空间气象演示设备，并用于向学生进行宣传。这一推广计划将开发不同版本的演示，适用于从高中到研究生的广泛的学生。

This is a cross-disciplinary project to develop a new version of the OpenGGCM (Open geospace general circulation model) magnetohydrodynamic (MHD) code that will run efficiently on a variety of computing environments. The MHD code will include a generalized Ohm's law and the Hall term to enable it to accurately model magnetic reconnection as well as plasma instabilities in thin current sheets. The code will be used to investigate the impact of Hall physics and secondary instabilities on 3D reconnection and generation of Flux Transfer Events (FTEs) at the dayside, as well as on substorm onset at the night side. The project will also investigate the interplay between the ballooning instability near Earth and magnetic reconnection in the mid-tail. The project will develop and utilize an automatic computer code generation tool that allows the user to create source code appropriate to a specific computer architecture. In addition to examining the physics of the magnetosphere using this code, the project will also make the code generating tool into an open source toolkit that will have broad applicability to science applications that are based on what are known as stencil computations.Magnetic reconnection and secondary instabilities of thin current sheets are of crucial importance to understanding the dynamics of Earth's global magnetosphere and space weather. Incorporating and understanding realistic physics into global magnetospheric codes is an important step in modeling and forecasting space weather. The computational methods that will be developed are applicable to a large range of applications in science and engineering that involve solving partial differential equations. The proposal also has an extensive educational component. It includes curriculum enhancement and creation of a summer seminar series to form a computational community at UNH, targeting graduate students, postdocs and faculty. A space weather demonstration device based on the PlayStation-3 with also be developed and used for outreach to students. This outreach program will develop different versions of the demonstration applicable to a wide range of students, from high school all the way through to graduate school.