Speakers
Description
Most PIC solvers used in accelerator physics rely on 2D field models, which can limit accuracy for high-intensity beams where space-charge effects dominate. A common approach to compute the self-consistent electric field in particle-based simulation codes is the use of a spectral Poisson solver based on FFT. In the MICROMAP library, a fully 3D fft-based Poisson solver has been implemented. At the China Spallation Neutron Source (CSNS), an alternative technique based on tensor decomposition has been developed to overcome limitations such as the treatment of image-charge effects and boundary conditions. In this proceeding, we present a benchmark comparing the traditional FFT-based solver implemented in MICROMAP and the tensor-decomposition method developed at CSNS for long-term tracking of high-intensity bunched beams in 3-dimensional space. We examine the differences in field accuracy and computational performance.
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