(CMS GEANT4 simulation)

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Presentation transcript:

(CMS GEANT4 simulation) Status of OSCAR (CMS GEANT4 simulation) Vicente Lara (CERN) Pedro Arce (CERN/IFCA-Santander) GEANT4 Workshop 5 july 2001 GEANT4 Workshop 2001 Status of OSCAR Vicente Lara(CERN)

Status of OSCAR Vicente Lara(CERN) Geometry: All geometry up-to-date Hunting overlaps More detailed checking in progress Magnetic field: Up-to-date 2D field map 3D TOSCA field map Integrators SimpleRunge RKG4 GEANT4 Workshop 2001 Status of OSCAR Vicente Lara(CERN)

Status of OSCAR Vicente Lara(CERN) Status (II) Primary generator: CMS particle gun: Scan in , , energy Random in , , energy Interface with HEPEVT ASCII files Interface with PYTHIA ntuples Hits: Transient hits implemented Persistent (Objectivity) hits Almost done for muon system To be done for the rest Physics list: Basic electromagnetic and hadronic processes Default cut 2 mm GEANT4 Workshop 2001 Status of OSCAR Vicente Lara(CERN)

Status of OSCAR Vicente Lara(CERN) Production O(103) events produced Problems in magnetic field Volume overlaps? Too many particles produced in some volumes ( > 106 particles/event)  cuts per volume needed Tracking in vacuum  user limit GEANT4 Workshop 2001 Status of OSCAR Vicente Lara(CERN)

Status of OSCAR Vicente Lara(CERN) Plans Tuning of cuts for performance First OSCAR milestone: “Reproduce the physics results of the GEANT3 simulation with the same performance” Hits being produced to be read by reconstruction software GEANT3 must soon be replaced by GEANT4  cuts per volume needed Milestone: Physics TDR (december 03) must be produced with GEANT4 events GEANT4 Workshop 2001 Status of OSCAR Vicente Lara(CERN)