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mplementation of the Kinetic Plasma Code with Locally Recursive non-Locally Asynchronous Algorithms

机译:具有本地递归非本地异步算法的动态等离子体代码的实现

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Numerical simulation is presently considered impractical for several relevant plasma kinetics problems due to limitations of computer hardware even with the use of supercomputers. To overcome the existing limitations it is suggested to develop algorithms which would effectively utilize the computer memory subsystem hierarchy to optimize the dependency graph traversal rules. The ideas for general cases of numerical simulation and implementation of such algorithms to particle-in-cell code is discussed in the paper. This approach enables the simulation of previously unaccessible for modeling problems and the execution of series of numerical experiments in reasonable time. The latter is demonstrated on a multiscale problem of the development of filamentation instability in laser interaction with overdense plasma. One variant of the simulation with parameters typical for simulations on supercomputers is performed with the use of one cluster node. The series of such experiments revealed the dependency of energy loss on incoming laser pulse amplitude to be nonmonotonic and reach over 4%, an interesting result for research of fast ignition concept.
机译:目前,数值模拟对于几种相关的等离子体动力学问题,即使是使用超级计算机的局限性,若干相关的等离子体动力学问题也是不切实际的。为了克服现有的限制,建议开发算法,该算法可以有效地利用计算机存储器子系统层次结构来优化依赖图遍历规则。纸张讨论了对粒子内码代码的数值模拟和实施算法的一般例外情况的思路。这种方法使得在合理的时间内模拟建模问题和执行一系列数值实验的仿真。在激光相互作用与过阵等离子体的激光相互作用中发展的多尺度问题上证明了后者。使用一个群集节点执行对超级计算机上的模拟典型的参数的一个变体。该系列这样的实验揭示了能量损失对传入激光脉冲幅度的依赖性,以非调指向,达到超过4%,这是对快速点火概念的研究的有趣结果。

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