Speaker
Description
Accurate geometric representation is essential in accelerator beam-matter interaction Monte-Carlo simulations, yet conventional Constructive Solid Geometry (CSG) modeling of beamline elements or tunnels remains time-consuming and error-prone. Recent FLUKA developments introduce a CAD-based workflow supporting CAE volumetric meshes, offering a robust alternative to manual CSG implementation. This new approach allows direct import of meshes generated in Gmsh, Ansys, or Abaqus, enabling seamless integration with the existing FLUKA geometry kernel while preserving continuity with existing functionality. This workflow considerably accelerates model creation, especially for complex geometries, shifting the effort from geometry description to mesh generation. Benchmark comparisons will be presented between classical CSG geometries, FLUKA CAE-mesh geometries, and Geant4 CAD surface meshes. The results demonstrate that while CAE meshes introduce a modest performance penalty, they provide substantial gains in accuracy, maintainability, and interoperability across design and simulation environments. This development establishes a fast, accurate, and modern route for accelerator modeling.
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