Re: VMC open issues

Hi Andrei,

Thanks for this initiative.

I would add one more topic to open issues: The warning from Geant4 VMC when running with G4Root: No physical volume found at track vertex: (107635,-190901,-638802) ++++ TG4Warning: ++++

     TG4TrackingAction::UserProcessHits:
     Cannot locate track vertex.
+++++++++++++++++++++++

Next Monday, 10:00 is ok for me, I will participate via EVO.

Best regards,

Ivana

Andrei Gheata wrote:
> Hi everybody,
>
> It seems we have enough issues for a first meeting:
>
> A. Using GEANE in CBM track reconstruction algorithms - presentation by
> Andrey Lebedev
>
> B. Open issues to be discussed/followed. We will discuss at the first
> meeting who will be responsible for following-up each item
>
> 1 - Assemblies:
> In Geant4 they have no Id but in ROOT they have, this has consequences
> to the geometry tree, i.e: If one try to relay on the mother-daughter
> relation the code will differ between the different navigations (ROOT
> and G4Native) is it possible to have a unified concept? Why do they have
> an Id in ROOT? Sometimes they are even seen in the simulation, something
> which should never happened.
>
> 2. In TGeant3.cxx there is many particles and decay modes that are hard
> coded there! If one try to define his own particles and decay modes it
> could conflict, and I already runs into problems and get very strange
> results before finding out that some things are hard coded.
>
> 3. Cerenkov total reflection:
> it is not working properly with GeoManager, when comparing with
> G4Native, it is working as expected (the same geometry is converted to
> Native G4 via VGM)
>
> 4. Geane-VMC:
>
> Eustep.F has to be re-written in C++ to have more control on the
> stepping behavior of Geane
>
> 5. "Proposed step is 0" issue in FLUKA VMC - In some condition there are
> some slow electrons (P ~= 500 KeV) that try to do very short step (~
> 1.e-20 cm) so simulation code cannot go on. - reported by Vito in the
> context of ILCroot
>
> I would propose next Monday at 10:00 - room to be confirmed. Please let
> me know your proposal if this one clashes with your schedule. Let me
> know anyway your intended attendance. I will book a room with EVO so
> that people remote can participate.
>
> Best,
> Andrei
>

-- 
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e-mail:  Ivana.Hrivnacova_at_cern.ch
address: Institut Physique Nucleaire, 91406 Orsay, France
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