Summary of the 7th Geant4 Collaboration Workshop Some biased points Jürgen Knobloch CERN The workshop 7th Geant4 workshop - 68 participants Key topics: – Comparisons with test-beam data – Physics processes – Graphics, frameworks and interactivity – Use of Geant4 for background radiation – Software process and documentation – Plans and goals – Collaboration Agreement Comparisons with test-beam data HEC Pions Continuous progress e/π signal ratio QGS Good interaction How far do we need to go? Can the experiments express quantitative e/π signal ratio LHEP requirements? Test beam data are considered free from systematic errors!? Pion energy [GeV] Physics Physics lists – long standing request – now they are there thanks Hans-Peter! – to be tried and continued Many new processes become available – expect cascade model implementation New x-sections from experiments (like Harp) Radiation studies – Biasing available – Demonstrate it in LHC! Software structure Integration with Virtual MC frameworks – requires agreement on – many examples seen abstract interfaces – component concept – feedback is going on – “Pythonize” components Hits – people use their own – need for action? Relations with users Hypernews very popular Documentation progressing Web to follow Tutorials, simple & advanced examples – CDROM, web-portal to try Geant4 Resources – User support needs effort! – No magic – two ways: Draw from development Find (attract) new people Other issues seen Performance – serious issue – is (to be) addressed in a serious way – establish timing benchmarking suite – is memory consumption an issue? Software development support – Infrastructure – Inflation or deflation of platforms? MoU / Collaboration agreement Keep Geant4 collaboration intact! Some considerations – The CB is composed of very busy people (directors etc.): rather offload the CB from executive tasks! – Do not impose unnecessary/damaging restrictions (such as a global publication policy)! – Integrate the already agreed user requirement committees! – Keep the makers of Geant4 at the heart of the collaboration! – Keep a proper balance between the interests of the different user communities A possible arrangement … Collaboration Board Scientific Advisory Board TSB URB TSB URB WG1 WGn Hepurc xyzurc LCG-Resources LCG-RTAG More important than structure… … is appropriate communication – between all boards and committees – with the Geant4 developers – with the Geant4 user communities Decisions, conclusions, actions at committee meetings – … can be agreed upon either during the meeting or shortly afterwards by email – must be communicated (up and down) swiftly Thanks John, Günter, Gabriele, Jacek, Eric, Dominique Session leaders, speakers, discussion participants … …. everybody who came See you again next year at …?