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首页> 外文期刊>Computer physics communications >Ultrahigh-order Maxwell solver with extreme scalability for electromagnetic PIC simulations of plasmas
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Ultrahigh-order Maxwell solver with extreme scalability for electromagnetic PIC simulations of plasmas

机译：超高阶Maxwell求解器，具有极端可扩展性，用于等离子体的电磁照片模拟

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The advent of massively parallel supercomputers, with their distributed-memory technology using many processing units, has favored the development of highly-scalable local low-order solvers at the expense of harder-to-scale global very high-order spectral methods. Indeed, FFT-based methods, which were very popular on shared memory computers, have been largely replaced by finite-difference (FD) methods for the solution of many problems, including plasmas simulations with electromagnetic Particle-In-Cell methods. For some problems, such as the modeling of so-called "plasma mirrors" for the generation of high-energy particles and ultra-short radiations, we have shown that the inaccuracies of standard FD-based PIC methods prevent the modeling on present supercomputers at sufficient accuracy. We demonstrate here that a new method, based on the use of local FFTs, enables ultrahigh-order accuracy with unprecedented scalability, and thus for the first time the accurate modeling of plasma mirrors in 3D. (C) 2018 Elsevier B.V. All rights reserved.
机译：大型平行超级计算机的出现，使用许多处理单元的分布式记忆技术，有利于以较难的全球非常高级光谱方法为代价开发高度可扩展的本地低位载体。实际上，基于FFT的方法在共享存储器计算机上非常受欢迎，这一直受到有限差异（FD）方法的用于解决许多问题的方法，包括具有电磁粒子粒子的等离子体模拟。对于一些问题，例如所谓的“等离子体镜”的建模，用于产生高能粒子和超短辐射，我们已经表明，标准FD的PIC方法的不准确性防止了现有超级计算机的建模足够的准确性。我们展示了一种基于本地FFT的使用的新方法，使得超高阶精度具有前所未有的可扩展性，因此首次在3D中首次进行准确建模等离子体镜子。 （c）2018 Elsevier B.v.保留所有权利。

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