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ORIGINAL RESEARCH article

Front. Nucl. Eng.
Sec. Fission and Reactor Design
Volume 3 - 2024 | doi: 10.3389/fnuen.2024.1400482
This article is part of the Research Topic CAD-to-MC Geometry Modelling Approaches for Advanced Nuclear Systems View all 3 articles

New CAD modeling approach in Geant4 with half-space CSG

Provisionally accepted
Yuefeng Qiu Yuefeng Qiu *
  • Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

The final, formatted version of the article will be published soon.

    for modeling detector geometries, while representing intricate Computer Aided Design (CAD) structures can be cumbersome. This paper presents a novel approach that overcomes this limitation. A new CSG solid type called "half-space solid" has been developed, enabling the equivalent representation of complex CAD solids within Geant4. An automatic program utilizes optimized decomposition algorithms to convert CAD solids into half-space solids. The Geometry Description Markup Language (GDML) has been extended to accommodate the half-space solid type, alongside the development of interfaces for exporting converted geometries and their subsequent import into Geant4. These advancements establish a fully automated workflow for converting CAD geometries into CSG-based representations suitable for Geant4 simulations. The reliability of the half-space solid-based modeling approach has been verified through comparisons with established Geant4 solids for both simple shapes and a complex fusion reactor model. The excellent agreement obtained from these comparisons demonstrates the efficiency of this new approach.

    Keywords: CAD, CSG, GDML, GEANT4, Half-space, McCad

    Received: 13 Mar 2024; Accepted: 26 Jul 2024.

    Copyright: © 2024 Qiu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yuefeng Qiu, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.