GEANT4 Workshop, Helsinki 3031 November 2003

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GEANT4 Workshop, Helsinki 30-31 November 2003

• Welcome address
• V.Karimäki
• Helsinki Institute of Physics

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Outline

• Welcome everybody!
• Brief top-down information
• Finland
• Universities
• Kumpila Campus
• Helsinki Institute of Physics
• CMS Software and Physics project
• GEANT4 applications in CMS (Compact Muon
• Solenoid experiment at Large Hadron Collider)

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Facts about Finland

• Total area 338,000 sq km
• Population 5.2 million
• Capital Helsinki
• Languages Finnish and Swedish
• Member of the European Union since 1995
• Universities account for the bulk of basic
  research
• 20 universities, 31 polytechnics
• More than 1,200 doctoral graduates each year
• RD funding 3.5 of GDP
• Exports 21 high technology

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Universities and RD in Finland (2002)

• 20 universities and 31 polytechnics
• 1,224 doctoral graduates in 2002
• RD Employs nearly 70,000 people
• Universities 27
• Business enterprises 73 (Nokia etc.)
• Total input roughly 5 billion EUR
• RD input about 3.5 of GDP
• Finlands share of OECD countries RD input
  about 0.7

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Helsinki Univ. Kumpula Campus -2003

• Accelerator Laboratory
• 1982
• Botanic Garden
• 1988 - 2010
• Chemicum
• 1995
• Faculty Office
• 1996
• Physicum
• 2001

x
x
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Kumpula Campus 2004-2005

• Exactum 2004
• - Mathematics
• - Computer Science
• - Rolf Nevanlinna inst.
• - Seismology
• Meteorology Dept.
• 2005
• Oceanology Inst.
• 2005

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Helsinki Institute of Physics (HIP)

• Founded 1996 by act of Parliament as a Finnish
  national institute
• Basic and applied physics, plus technology
  development
• Host Universities Helsinki Univ., Technical
  Univ., Jyväskylä Univ.
• HIP is the official body in Finland for
  collaboration with CERN
• Research programmes
• Theory programme
• High energy physics programme
• Nuclear physics programme
• Technology programme
• CMS programme

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CMS programme

• Two projects
• Tracker project (TOB hardware and silicon RD)
• CMS Software and Physics Project
• CMS detector simulation (GEANT applications)
• GEANT4 development and maintenance
• Calibration algorithms, especially detector
  alignment
• Event reconstruction algorithms
• Physics simulation and analysis
• Computing, mass productions
• GRID activities Linux cluster design and
  management

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CMS Software and Physics Project at HIP

• Members (7 Helsinki based and 3 CERN based)
• A. Heikkinen, Hki
• V. Karimäki, Hki (Proj.Leader)
• R. Kinnunen, Hki
• T. Lampén, Hki
• K. Lassila-Perini, CERN
• S. Lehti, CERN
• T. Lindén, Hki
• J. Nysten, CERN
• L. Wendland, Hki
• M. Voutilainen, Hki

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GEANT4 in CMS experiment

• OSCAR Object-oriented Simulation for CMS
  Analysis and Reconstruction
• Detector description
• a big task, several 105 different elements
• several hundreds of different materials and media
• Particle tracking
• realistic, all relevant physics processes
• highly non-uniform magnetic field in outer
  regions
• Simulation of millions of events
• several minutes per event (on the average)
• typically 1000 CPU-years consumed each year
  (present day situation)

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Compact Muon Solenoid in GEANT4
GEANT4 simulated Higgs event in the CMS Tracker
CMS detector description Input data in XML file
10 m
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Example of OSCAR validation plotOSCAR (G4)
versus CMSIM (G3)
G3
G4
G4
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Linux cluster mill

• HIP design (Tomas Lindén)
• 66 CPUs in total
• 2,13 GHz Athlon MP2600
• 1 GB memory per node
• Part of NorduGrid (soon)
• GEANT4 will be the largest
• CPU consumer when starting
• CMS Monte Carlo productions

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And in summary

• GEANT widely used in particle experiments
• Moved from GEANT3 to GEANT4
• My presentation was just a glimps to the
  applications in a high energy collider experiment
• GEANT4 is becoming more and more popular in
  several other fields
• We will learn much about it in this workshop!
• I wish everybody an enjoyable getting together in
  terms of the GEANT4 framework!