MRADSIM-Converter: A new software for STEP to GDML conversion

Radiation effects analysis of instruments operative in harsh radiation environment is crucial for performance and functionality of electronic devices and components. Engineering design of instruments is usually carried out in Computer Aided Design (CAD) engineering software. Geant4-based Monte Carlo codes are extensively used for particle transport simulation and analysis. However, Geant4 is not prepared to accept CAD Standard for The Exchange of Product data (STEP) format. MRADSIM-Converter is a new software for STEP to Geometry Description Markup Language (GDML) format conversion, readable by Geant4-based Monte Carlo codes. Its validation with two different converters confirms its higher speed for importing CAD geometries with arbitrary size and complexity having a user-friendly interface for modifying volumes properties.针对严苛辐射环境中运行的仪器开展的辐射效应分析，对于电子器件与组件的性能及功能至关重要。仪器的工程设计通常借助计算机辅助设计（Computer Aided Design，CAD）工程软件完成。基于Geant4的蒙特卡洛代码被广泛应用于粒子输运模拟与分析工作。然而，Geant4并不支持接收产品数据交换标准（Standard for The Exchange of Product data，STEP）格式的数据。MRADSIM-Converter是一款可将STEP格式转换为几何描述标记语言（Geometry Description Markup Language，GDML）格式的新型软件，该格式可被基于Geant4的蒙特卡洛代码读取。通过与两款不同转换器的验证对比，证实该软件在导入任意尺寸与复杂度的CAD几何模型时速度更优，同时配备了可修改体积属性的友好用户界面。