FCC Software Meeting

Friday 26 Apr 2019, 10:00 → 12:00 Europe/Zurich

40/R-B10 (CERN)

FCC Software bi-weekly meeting 26.04.2019

 
Present/Contributors: Patricia Azzi, Coralie Neubuser Pere Mato, Graeme Stewart,  Lorenzo Pezzoti, Javier Cervantes Valentin Volkl

Apologies: Clement Helsens

Report from the CEPC workshop (see [slides](https://indico.cern.ch/event/815692/contributions/3404655/attachments/1834861/3005788/19-04-29-cepc-summary.pdf)

* cepc framework "sniper" developed in context of juno
* common Framework would be beneficial to everyone
  - gaudi still a strong candidate
* at the workshop there was quite some interest in Podio/LCIO datamodel implementations
* PLCIO: LCIO implemented in Podio, developments by Frank Gaede
* Discussion will continue in Future Collider Software Workshop in June

 

 Build system

* Reminder that lxplus changed to centos7, to use old releases it is necessary to connect to lxplus6
* externals 94.2 installed for centos7 and slc6
* FCCSW v0.10 [released](https://github.com/HEP-FCC/FCCSW/releases/tag/v0.10)

 DD4HEP for AIDA++

* Agreement that we should take advantage of the "Call to dd4hep users about future extensions and
  satisfaction" to give some some feedback to dd4hep developers and highlight needs of FCC
* Clement will kindly compile issues in an email
* No specific major extension required but several areas where we could benefit from more developments:

* Optical Properties: One of the major issues for some of the detector performance studies, but developments for that are already ongoing/finished
  - need installations of new versions
* VolumeManager: Current implementation could be more user-friendly (currently need to create many
  tools such as
  https://github.com/HEP-FCC/FCCSW/blob/master/Reconstruction/RecFCChhCalorimeter/src/components/CellPositionsECalBarrelTool.h)
  and flexible (for some simple models the position can easily be calculated with a formula instead
  of a lookup of the transformation matrices).
* Fast Simulation: we already have the mixing in Geant4 so this is no a huge concern.
* ConditionsDB: not needed at the current state of FCC studies, but could be critical for precision
  at FCC-ee, so we welcome developments on this
* Reconstruction geometries: reconstruction is maybe one of the most urgent areas for FCC software
  right now, so any development there are also very beneficial.
* Visualization: maybe not a core functionality of DD4hep, but more functionality is very much
  needed, not only for communication/outreach/talks but also for debugging of detector models

 

1 Summary of the CEPC WS

Speaker: Valentin Volkl (University of Innsbruck (AT))

19-04-29-cepc-summary.pdf

2 Status of FCCSW build system

Speaker: Javier Cervantes Villanueva (CERN)

FCC-build-system-update-26_04_2019.pdf

3 Call to dd4hep users about future extensions and satisfaction

Dear colleagues, dear DD4hep users,

you are receiving this mail because you are registered as a DD4hep user.
We, the authors, are currently discussing possible improvements and extensions
to dd4hep.

Among the improvements we are aiming to incorporate in DD4hep we though about the
following extensions and features:
- Fast simulation in DDG4
- Visual overlap detection for geometry debugging
- Gateway to a git based database (developed by LHCb) for dd4hep conditions and alignments
as a possible persistency mechanism.

We are however aware that we may not have a clear overview about the needs and
wishes of our users outside the linear collider community.
Hence, the scope of this email is thus to encourage you to contact us regarding
additional features that you believe are important for your community and should
be incorporated in DD4hep.

Please send a - ideally prioritized - list of proposals to the DD4hep Authors mailing list
(dd4hep-authors@cern.ch) before May 5th. We will then compile a comprehensive list of
possible future developments. This compilation will as well serve as a basis for an
evaluation of a possible application for the follow-up project of AIDA2020 of the
European Union, while also examining the possibilities of what can be done within
the existing man-power budget.

If you believe the existing functionality is sufficient, we would nevertheless appreciate
feedback, to get an idea of the "mood" of our users.

We hope to hear from you soon!

Best regards,

The DD4hep Authors
Markus Frank, Frank Gaede, Marko Petric, Andre Sailer

4 Review of ongoing PRs

Release v0.10

5 Round table