Overview

This tutorial is designed to give the user a quick glimpse of some key aspects of the simulation assembled toolkit and is in no way near a full treatment. Rather, the aim of this tutorial is to provide starting point to quickly begin simulation work with the modern software tools. The key toolkit components were thoughtfully selected to (i) leverage externally supported and maintained projects, (ii) decouple framework as much as possible, (iii) allow for modern tools to be developed with the vision of using these tools for next decade. The key software components are:

• DD4hep (with Geant4 and ROOT)
• GAUDI
• ACTS
• podio

DD4hep

DD4hep introduces the concept of a DetElement which is related to the volumes (logical volumes) and placed volumes but not in a strict way. These elements build up a separate tree which describes the relationship between the volumes and the readout detectors. Through the unique BitField ID this allows position space information to be mapped to and from channel number/cell ID space.

EIC Data model

PODIO

The idea is to use plain-old-datatype IO. PODIO stamps out structs based on yaml files.

NPDet - Nuclear physics detector library

NPDet is a collection of generic detectors and geometry tools built around using DD4hep.

• dd_web_display
• npdet_info
• npdet_to_step
• npdet_to_teve
• npdet_fields

Reconstruction and Tracking Tools

The goal of having a robust detector library and data model is to aid in the use and development of new tools, techniques, and algorithms.

Many external tools exist that can be applied along the path to the ultimate physics analysis.

See the useful links for a list of tools.