3维并行全电磁粒子模拟软件UNIPIC-3D
Three-dimensional parallelized fully-electromagnetic particle simulation code UNIPIC-3D
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摘要: 介绍了自行研制的3维并行全电磁粒子模拟软件UNIPIC-3D。在该软件中，电磁场量用二阶精度的时域有限差分方法迭代，粒子用相对论牛顿-洛仑兹力方程推进。该软件拥有复杂器件的几何建模和网格自动剖分的功能，具有模拟相对论返波管、虚阴极振荡器、磁绝缘线振荡器等高功率微波器件的能力。且该软件具有强大的后处理功能，可以显示电场、磁场、电流、电压、功率、频谱、粒子相空间等。在高性能并行计算机上对软件的并行效率进行了测试。通过与2.5维UNIPIC软件的结果进行比较，验证了UNIPIC-3D软件的正确性。Abstract: This paper introduces a self-developed, three-dimensional parallelized fully-electromagnetic particle simulation code UNIPIC-3D. In the code, the electromagnetic fields are updated using the second-order, finite-difference time-domain (FDTD) method, and the particles are moved using the relativistic Newton-Lorentz force equation. The code can be used to simulate the high-power microwave (HPM) devices, such as the relativistic backward wave oscillator, coaxial vircator, and magnetically insulated line oscillator (MILO), etc. Users can use the graphical user’s interface to create complex geometric structures of the simulated HPM devices, which can be automatically meshed by UNIPIC-3D code. The code has a powerful post-processor which can display the electric field, magnetic field, current,
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