Abstract
DD4hep is an open-source software toolkit that provides comprehensive and complete generic detector descriptions for high energy physics (HEP) detectors. The Compact Muon Solenoid collaboration (CMS) has recently evaluated and adopted DD4hep to replace its custom detector description software. CMS has demanding software requirements as a very large, longrunning experiment that must support legacy geometries and study many possible upgraded detector designs of a constantly evolving detector that will be taking data for many years to come. CMS has chosen DD4hep since it is a high-quality, community-supported solution that will benefit from continuing modernization and maintenance. This presentation will discuss the issues of DD4hep adoption, the advantages and disadvantages of the various design choices, performance results, and the integration of the plugin systems from CMS and Gaudi, another open-source software framework. Recommendations about DD4hep based upon the CMS use cases will also be presented.
Highlights
The design and simulation of a complex particle detector requires advanced software
Its detector geometry implementation is based upon ROOT [3], another toolkit widely used in high energy physics (HEP)
The evaluation was completed in December 2018 with the conclusion that DD4hep would meet all of the requirements of Compact Muon Solenoid (CMS)
Summary
The design and simulation of a complex particle detector requires advanced software. Each upgrade design must be simulated and assessed, which means the detector description software must support not just one complete description of the complex CMS detector, but many different versions of it. The CMS experiment and the software to support it is expected to continue for the twenty years or so, and the software must keep up with advances in technology over this long period. The CMS collaboration developed its own custom detector description (DD) software, but this code has fallen behind other advances in CMSSW, the CMS software system. Its detector geometry implementation is based upon ROOT [3], another toolkit widely used in HEP It has been used by the Compact Linear Collider, Future Circular Collider, and the International Large Detector collaborations for studies of proposed particle detectors. The evaluation was completed in December 2018 with the conclusion that DD4hep would meet all of the requirements of CMS
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