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 offer a robust alternative to manual CSG implementation by introducing a CAD-based (Computer Aided Design) workflow. The new approach supports CAE (Computer Aided Engineering) volumetric meshes and the direct import of meshes generated in Gmsh, Ansys, or Abaqus. This workflow is expected to accelerate model development, particularly for complex geometries. Benchmark comparisons will be presented between FLUKA conventional CSG geometries, FLUKA CAE-mesh geometries, and an independent development carried out in Geant4 to support 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.
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