Peter Loch

1

• Simulation Status Plans for 7.0.0 (for
  Misha)

• Important Integration Milestone
• March 26th Andrea Dell'Acqua created a
  prototype of building the entire Atlas geometry
  in Geant4 where the LArG4 package included
  without changes. Now Andrea's "glue" code is
  stored in new subpackage offline/LArCalorimete
  r/LArG4/LArG4Sim
• This integration method can be used also for
  combined EMB-Tile testbeam simulations.
• Bill Seligman (Nevis Labs) is updating LArG4
  package to simplify
• this "glue" code
• the task of using LArG4 as the basis of the
  testbeam simulation
• This update should be finished before April 15.
  The detailed plan for G4 ATLAS integration will
  depend on results of the special meeting during
  ATLAS Software Week in May but the major steps
  have been done.

2

• The structure for G4 test-beam codes in
  repository
• There is strong interest in using LArG4 as the
  basis of the testbeam simulation to
• validate Geant4 and LArG4 in comparison with
  testbeam data
• get feedback from users
• The parts which are common for a testbeam and
  the whole ATLAS will be in existing package
  LArCalorimeter/LArG4
• But the specific testbeam parts will be in
  another tree structure, LArCalorimeter/LArG4TB,
  at the same level as LArCalorimeter/LArG4.
  Obviously there will be a dependency of LArG4TB
  on LArG4, and it will reflect our desire to use
  the same (as much as possible) code for testbeams
  and the whole ATLAS
• In March the package LArCalorimeter/LArG4TB/
  has been created with subpackages
  (subdirectories)
• LArG4TBBarrel
• LArG4TBEC
• LArgG4TBHEC
• LArG4TBEmecHec
• LArG4TBFCAL
• LArG4TBdbORB

3

• Plans for testbeam simulations (to be reviewed
  with Rob)
• The EMB G4 testbeam code was used by Gaston
  Parrour and Kostas Kordas for G4 validation.
  Guillaume Unal will work with updated by Gaston
  code for combined EMB-Tile testbeam. Milestone
  the first version of combined EMB-Tile G4 code in
  Release 7 (if Guillaume Unal and Vakhtang Tsulaia
  agree)
• The EMEC G4 code is used by Maarten Boonekamp to
  study the response drop at very high incoming
  energy flux. The simulation will be compared with
  data taken with a focused very narrow beam in
  2002. See the talk "Ion build up analysis status"
  on EM general meeting on April 9th
• The EMEC G4 code of testbeam module prepared by
  Andrei Soukharev was integrated with HEC G4
  testbeam code by Pavol Strizenec for combined
  2002 EMEC-HEC testbeam
• 2003 FCal calibration run can be simulated in G4
  (Peter Loch may need manpower). PL interest in
  Ottawa (M. Khakzad et al.)

4

• Release 8
• Evaluation of GeoModel for LAr G4 detector
• First version of combined EC2 testbeam code
• Pile-Up simulations in G4