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ACTS Developers Meeting (Early Timeslot)

→ Europe/Zurich
ZOOM ONLY

ZOOM ONLY
Alexander J Pfleger (University of Graz (AT)), Andreas Salzburger (CERN), Joana Niermann (Georg August Universitaet Goettingen (DE))
Description

General discussion on developments in Acts.

Zoom passcode is visible for logged in users, if you don't have an account and want to join, let us know at acts-developers@cern.ch

Acts Developers Meeting
Zoom Meeting ID
98843051283
Host
Paul Gessinger
Alternative hosts
Alexander J Pfleger, Joana Niermann
Useful links
Join via phone
Zoom URL
    • 09:00 → 09:25
      Implementating the ATLAS TRT Geometry into ACTS 25m
      Speaker: Zhiliang Chen (University of Science and Technology of China (CN))
      ACTS-Dev-240109.pdf

      Discussion

      Q: Which Fitter was used (p.15)? (Alex)

      A: (Xiaocong) KF

      Q: Can we find the 'sub sectors' in the TGeo? (Andreas)

      In a refitting setup, we don't always need all straws available, since given by pattern recognition.
      More important is that the material is available.
      Not necessary for this, but could be a lot faster, for using a different navigation.
      Then we can describe them as boxes in our new geometry.

      C: Endcaps (Andreas)

      The endcaps are a smaller problem.
      Should be enough to have simple discs.
      No need to check for misassignment.
      So, pack the endcap straws and pack them into discs.
      A: (Xiaocong) Currently problems in the geometry translation.

      C: Geometry translation (Andreas)

      Make a geo model-plugin, that doesn't use gdml.
      There will be a detector description workshop at the end of the month.
      Maybe we can learn how to write a translation.

      Q: 51 layers is maximum of hits to find? (Christian)

      Shouldn't be a problem, because we usually stay below (sharp drop after 45).
      Still we maybe need to tune this number.

      Q: Material budget: Not bin in multiples of 32? (Christian)

      A: (Andreas) Ganularity is not trivial and they won't line up.
      Majority is in the frame structure.
      Straws we could maybe even manage in one description.
      Let's have this project follow up as a reimplimentation.
      Then in a second step (after the QP) have a faster description of the track fitting.

    • 09:25 → 09:50
      The Implementation of an Open Drift Chamber in ACTS 25m
      Speaker: Dr Tao Lin (IHEP, CAS)
      lintao-202401-DriftChamberODD.pdf

      Discussion

      Q: Do we see thta we need to model a shape like this in ACTS? (Andreas)

      Should we deal with it in a smart enough navigation or just navigate to the surface?
      Xiaocong: Depends on how larg the stereo angle is.
      If it is large enough we should put it into ACTS.

      The description of the surface can be created easily, but the intersection is more problematic.
      But when we can intersect efficiently, it is not a problem.
      So for Runge-Cutta we need to add the straiht line intersect.
      Xiaocong: That is the really long term approach.

      It is nice that we have a source like this around.
      Could be useful to have it very clear, even with unit tests.

    • 09:50 → 10:00
      Round table 10m
      • Documentation builds sometimes fail -> Just fix, it's probably not your fault
      • Finish documentation started with last docathon
      • Next major release (32) in about 2 weeks
      • Next early morning meeting will be announced about 2 weeks prior. Xiaocong is in contact with Alex