One-to-one direct modeling of experiments and astrophysical scenarios: pushing the envelope on kinetic plasma simulations
One-to-one direct modeling of experiments and astrophysical scenarios: pushing the envelope on kinetic plasma simulations
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DOI：
10.1088/0741-3335/50/12/124034
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发表时间：
2008-12-01
影响因子：
2.2
通讯作者：
Mori, W. B.
中科院分区：
文献类型：
--
作者：
Fonseca, R. A.;Martins, S. F.;Mori, W. B.
在许多天体物理和实验室场景中，动力学效应发挥着重要作用。这些范围从天体物理冲击和等离子体壳碰撞到高强度激光等离子体相互作用，并应用于快速点火和粒子加速。对这些场景的进一步理解需要详细的数值建模，但完全相对论动力学代码的计算量很大，对此类场景进行一对一直接建模并与实验结果直接比较的目标仍然难以实现。在本文中，我们讨论了对实验和天体物理场景进行动力学等离子体模拟所涉及的问题，重点关注一对一直接建模需要实现的目标以及所涉及的计算要求。我们专注于代码效率和新算法，特别是并行可扩展性问题，即动态负载平衡，以及高阶插值和增强帧模拟以优化模拟性能。我们还讨论了这些数值实验所需的新可视化和数据挖掘工具，并且还介绍了说明这些技术的最新模拟工作。
There are many astrophysical and laboratory scenarios where kinetic effects play an important role. These range from astrophysical shocks and plasma shell collisions to high intensity laser-plasma interactions, with applications to fast ignition and particle acceleration. Further understanding of these scenarios requires detailed numerical modeling, but fully relativistic kinetic codes are computationally intensive, and the goal of one-to-one direct modeling of such scenarios and direct comparison with experimental results is still difficult to achieve. In this paper we discuss the issues involved in performing kinetic plasma simulations of experiments and astrophysical scenarios, focusing on what needs to be achieved for one-to-one direct modeling and the computational requirements involved. We focus on code efficiency and new algorithms, specifically on parallel scalability issues, namely, on dynamic load balancing, and on high-order interpolation and boosted frame simulations to optimize simulation performance. We also discuss the new visualization and data mining tools required for these numerical experiments and recent simulation work illustrating these techniques is also presented.