Introduction to TOPAS¶
TOPAS wraps and extends the Geant4 Simulation Toolkit to provide an easier-to-use application for the medical physicist. TOPAS’s unique parameter control system lets you assemble and control a rich library of simulation objects (geometry components, particle sources, scorers, etc.) with no need to write C++ code.
Advanced users remain free to implement their own simulation objects in C++ code, and add them to TOPAS via an extension mechanism. While user-written objects benefit from underlying functionality of TOPAS base classes and the TOPAS parameter system, they can exploit the full flexibility of Geant4.
To discover the Geant4 version used by a specific version of TOPAS, please consult the History.