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    EP R&D Software Working Group Meeting

    → Europe/Zurich
    32/1-A24 (CERN)

    32/1-A24

    CERN

    40
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    EP R&D Software Working Group Meeting
    Zoom Meeting ID
    62893115044
    Host
    Graeme A Stewart
    Alternative host
    Andre Sailer
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    Software R&D Working Meeting Minutes

    2022-11-09

    Apologies: Benedikt

    Room: Graeme, Andi, Piyush, Dalila, Jakob, Paul, Andre, Anna, Pere, Valentin

    Remote: Geri, François, Juraj, Marco, Vincenzo

    Introduction (Graeme)

    QUEST - it’s the intermediate fellow program. Open to people with MSc.

    We can also apply via research fellow. N.B. one cannot have a QUEST then an applied research fellowship, which makes QUEST less attractive to PhDs.

    Q. Can we support travel via the EP R&D? No, and not personal machines either.

    Hardware (Jakob)

    A64FX was very dissapointing when tested by Geant4 colleagues. Ampere would be more attractive.

    ACTS is preparing a demonstrator with ARM already (as used by ATLAS for validating simulation, running in the Google Cloud).

    Vincenzo - CMS can usually get access to machines via E4 (ssh access) - try before you buy. Power9 would be available via CINECA in Italy.

    We agree to go ahead with the 2nd analysis machine, to be able to test remote reading. For the other non-x86 architetures we will investigate other options first, before buying anything.

    Reconstruction Tracking (Paul)

    GSF is important for electron reconstruction.

    Global Chi^2 fitter, some development still to happen.

    Refactored geometry is inspired by detray, and allows easier conversion back and forth.

    Can see if EDM4hep backend could be transparent, in the best case - to be seen!

    Q. Geri - is ATLAS a user or an evaluator? A. For Run 3 ATLAS use the vertex fitter. Project to use ACTS for Run 4 is underway. There is a also a prototype for the event filter pipeline.

    Q. Geri - what work is still needed for Key4hep? A. We need EDM4hep (plugin is not in the Key4hep repo - it’s an ACTS componement); Gaudi demonstrator not yet merged, it needs a little polish.

    Q. Graeme - what EDMs are used in other experiment? EIC is EDM4hep; Faser is xAOD; sPHENIX have a custom wrapper; ALICE and LDMX it’s early days here. Open question, could one use RDataFrame? RNTuple swaps AoS for SoA.

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