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GPU-accelerated 3D large-signal device simulation using the particle-in-cell code ‘Neptune’

We present large-signal, 3D simulations of vacuum electronic slow-wave amplifier operation using the GPU-accelerated FDTD-PIC simulation code, `Neptune'. Neptune implements a self-consistent, charge-conserving, electromagnetic, particle-in-cell algorithm optimized for parallel execution in both multi-core CPU and GPU processors. Significant performance gains achieved using a 512-core Nvidia GTX-580 graphics card are demonstrated.