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Particle tracking acceleration via signed distance fields in direct-accelerated geometry Monte Carlo
Patrick C. Shriwise,Andrew Davis,Lucas J. Jacobson,Paul P.H. Wilson 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.6
Computer-aided design (CAD)-based Monte Carlo radiation transport is of value to the nuclear engineering community for its ability to conduct transport on high-fidelity models of nuclear systems, but it is more computationally expensive than native geometry representations. This work describes the adaptation of a rendering data structure, the signed distance field, as a geometric query tool for accelerating CAD-based transport in the direct-accelerated geometry Monte Carlo toolkit. Demonstrations of its effectiveness are shown for several problems. The beginnings of a predictive model for the data structure's utilization based on various problem parameters is also introduced.