Overview

The Athena Detector at IP6 for Electron-Ion Collider experiment.

Detector geometry viewer:

• Central detector geometry
• Full Detector geometry (including beamline)

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Detector views

Getting Started

Adding/changing detector geometry

Hint: Use the CI/CD pipelines.

To avoid dealing with setting up all the software, we recommend using the CI/CD to make changes. Any feedback to help this process is appreciated.

Here is how to begin:

1. Look at existing detector constructions and reuse if possible. Note that "compact detector descriptions" -> xml files, and "detector construction" -> cpp file.
2. Modify xml file or detector construction.
3. Create a WIP (or draft) merge request and look at the CI output for debugging. Then go to back to 2 if changes are needed.
4. Remove the WIP/Draft part of the merge request if you would like to see your changes merged into the master.

See:

• Talk at computing round table

Compiling (avoid it)

First, see if the use case above is best for you. It most likely is and can save a lot of time for newcomers. To run the simulation locally, we suggest using the singularity image. More details can be found at the links below:

• https://dd4hep.web.cern.ch/dd4hep/page/beginners-guide/
• https://eic.phy.anl.gov/tutorials/eic_tutorial/
• https://eicweb.phy.anl.gov/containers/eic_container/

Related useful links

• [Athena_Detector_doc] (https://escalate.readthedocs.io/projects/g4e/en/latest/detector_naming.html)
• [g4e] (https://gitlab.com/eic/escalate/g4e)
• [eic_tutorial] (https://argonne_eic.gitlab.io/tutorial/eic_tutorial/part2/adding_detectors/)
• [DD4hep] (https://github.com/AIDAsoft/DD4hep)
• [DD4hep_manual] (https://dd4hep.web.cern.ch/dd4hep/usermanuals/DD4hepManual/DD4hepManual.pdf)