JefiPIC：基于Jefimenko方程的GPU三维全电磁粒子-in-cell模拟器
JefiPIC: A 3-D Full Electromagnetic Particle-in-Cell Simulator Based on Jefimenko's Equations on GPU
AI总结：
本文提出基于Jefimenko方程和GPU的3D全电磁PIC模拟器JefiPIC，通过全空间积分法简化非中性等离子体模拟，无需泊松求解和复杂边界，验证了其准确性与高效性。
摘要：
本文介绍了一种新颖的三维全电磁粒子-in-cell（PIC）代码，名为JefiPIC，它利用Jefimenko方程作为电磁（EM）场求解器，通过全空间积分方法实现。借助最先进的图形处理单元（GPU）的计算能力，我们使得PIC模拟中具有挑战性的积分任务变得可行。通过采用积分方法，我们提出的代码具有多项优势。首先，它为模拟非中性等离子体提供了自然的解决方案，无需进行诸如求解泊松方程之类的预处理。其次，它消除了设计复杂边界层以吸收场和粒子的需求。第三，无论选择何种时间步长，它都能保持等离子体模拟的稳定性。最后，它不需要严格的电荷守恒粒子到网格分配技术或电场散度修正算法，而这些在基于有限差分时域（FDTD）的PIC模拟中常用。为了验证我们代码的准确性和优势，我们将其与另外三种代码在不同等离子体系统中的粒子和场演化进行了比较。结果表明，Jefimenko方程与PIC方法的结合能够在开放边界等离子体系统中产生准确的粒子分布和电磁场。此外，我们的代码能够在可接受的执行时间内完成这些计算。本研究强调了JefiPIC的有效性和效率，展示了其在推进等离子体模拟方面的潜力。
英文摘要：
This paper presents a novel 3-D full electromagnetic particle-in-cell (PIC) code called JefiPIC, which uses Jefimenko's equations as the electromagnetic (EM) field solver through a full-space integration method. Leveraging the power of state-of-the-art graphic processing units (GPUs), we have made the challenging integral task of PIC simulations achievable. Our proposed code offers several advantages by utilizing the integral method. Firstly, it offers a natural solution for modeling non-neutral plasmas without the need for pre-processing such as solving Poisson's equation. Secondly, it eliminates the requirement for designing elaborate boundary layers to absorb fields and particles. Thirdly, it maintains the stability of the plasma simulation regardless of the time step chosen. Lastly, it does not require strict charge-conservation particle-to-grid apportionment techniques or electric field divergence amendment algorithms, which are commonly used in finite-difference time-domain (FDTD)-based PIC simulations. To validate the accuracy and advantages of our code, we compared the evolutions of particles and fields in different plasma systems simulated by three other codes. Our results demonstrate that the combination of Jefimenko's equations and the PIC method can produce accurate particle distributions and EM fields in open-boundary plasma systems. Additionally, our code is able to accomplish these computations within an acceptable execution time. This study highlights the effectiveness and efficiency of JefiPIC, showing its potential for advancing plasma simulations.
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。
