Reports from the previous day:


New IO: We  keep the implementation and continue with lite
AliRun object.  We store only detectors in the file, so we are able to
retrieve  them using  an  AliLoader object.   
Federico  asked for  the opinion  of  different detector.   

Yves said the  structure  was not  very
different, but the  implementation was really not the  same. He had the
impression that  it is  not very mature.  Probably one can  start more
easily from zero. Yves proposed  to continue with one detector, namely
TPC, and cover  as much use cases as possible. Then we could return to
the subject. The development would prevent us from using the code, so 
one has to be very careful. 

Bjorn supported the same point of view as Yves. He is worried about the 
reconstruction, namely the incremental one. All the detectors are able 
to reconstruct its data, but nobody tried a global.

Federico proposed to do the development in parallel. The effort needed is
a problem for detectors. Federico made an update of the situation with 
the CVS branches. He proposed to release v3-08 at the and of the week and then
merge the virtual MC branch with the standard CVS development branch. The 
result is supposed to be backward compatible, but this has to be carefully 
tested. The branch NewIO than has to be merged with the standard branch, 
which requires substantial help from the detectors. The proposal is to
start with ITS and TOF, because the people are here only until the end 
of the week.

Yves: One missing point in the design of NewIO is the possibility to have
several reconstructions as branches in one tree.

Agenda for the first meetings with the different detectors:

  TOF:  12/06/2002 14:00 in 13-R-012
  ITS:  12/06/2002 16:00 in 13-R-012
  PHOS: 12/06/2002 20:00 in 13-R-012

Virtual MC: The Geant4 part has been tested successfully. The Geant3 package is
rearranged and prepared for CVS, some additional scripts are to be prepared. 
The structure of Alice packages becomes the following:

  AliRoot: Everything without GEANT321, MINICERN, TGeant3, TGeant4
  Root: external distribution
  geant3: geant321, geant3mc (former TGeant3), minicern (will be reduced in
          the future)
  geant4_mc: geant4mc (former TGeant4)
  Geant4: external distribution
  Fluka: external distribution
  code checker: binary distribution
  fluka_mc: will appear in the future

Bjorn: Question about the technical issues. We do 
hits->digits->sdigits->rec_points->tracks. Could we use TTask in order to 
reorganize the code?

Federico: The lack of the appropriate IO structure prevented us from doing
it earlier. When the new solution is ready, we could go on with the TTasks. 
The algorithms have to be repackaged plus some more work on the cleaning, etc.

Bjorn: We can start with the fast MC.

Jiri: The standard macros for TPC tests and tracking do not support multi-
events. We have to put this possibility in. It should work for the old IO.

Yota: The question of slow and fast point has also to be solved. The change
of the efficiencies has to be understood.

Bjorn: The efficiencies are well understood now. The effort should be done 
on the SSD slow simulation.