离子加速用的Particle-In-Cell程序的比较：EPOCH、LSP和WarpX
A Particle-In-Cell Code Comparison for Ion Acceleration: EPOCH, LSP, and WarpX
摘要：
现在有比以往更多的粒子在细胞（PIC）的代码，研究人员用来模拟强烈的激光等离子体相互作用。迄今为止，在文献中，这些代码的直接比较相对较少，特别是对于相对论强度激光与薄过密目标的相互作用。为了解决这个问题，我们进行了代码比较的三个PIC代码：EPOCH，LSP，和WarpX的问题，激光驱动的离子加速在一个二维（3V）的几何形状为$10^{20}$ W cm $^{-2}$强度的激光。我们检查等离子体密度，离子能谱，和激光等离子体耦合的三个代码，并找到强协议。我们还使用不同的随机种子运行相同的模拟20次，以探索输出的统计波动。然后，我们比较了在一个节点上使用1到48个处理器的代码的执行时间和内存使用情况（没有“调优”以提高性能）。我们提供输入文件以鼓励在此领域进行更大和更频繁的代码比较。
英文摘要：
There are now more Particle-in-Cell (PIC) codes than ever before that researchers use to simulate intense laser-plasma interactions. To date, there have been relatively few direct comparisons of these codes in the literature, especially for relativistic intensity lasers interacting with thin overdense targets. To address this we perform a code comparison of three PIC codes: EPOCH, LSP, and WarpX for the problem of laser-driven ion acceleration in a 2D(3v) geometry for a $10^{20}$ W cm$^{-2}$ intensity laser. We examine the plasma density, ion energy spectra, and laser-plasma coupling of the three codes and find strong agreement. We also run the same simulation 20 times with different random seeds to explore statistical fluctuations of the outputs. We then compare the execution times and memory usage of the codes (without "tuning" to improve performance) using between 1 and 48 processors on one node. We provide input files to encourage larger and more frequent code comparisons in this field.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
