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Simulation tools for Upgrades

Simulation tools for Upgrades. Counts per 2.5 GeV bin in 50B AuAu Events. NLO pQCD (W. Vogelsang) CTEQ6M5, DSS FF pp @ 200 GeV | h |<1.0 q,g jets Direct g Fragmentation g p 0 (assume R AA = 0.2). p 0. Photons. Jets. Congratulations it’s a …. simulation. Colorado. Super Phenix.

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Simulation tools for Upgrades

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  1. Simulation tools for Upgrades Counts per 2.5 GeV bin in 50B AuAu Events NLO pQCD (W. Vogelsang) CTEQ6M5, DSS FF pp @ 200 GeV |h|<1.0 q,g jets Direct g Fragmentation g p0(assume RAA = 0.2) p0 Photons Jets

  2. Congratulations it’s a …. simulation Colorado Super Phenix March 13, 2010 Boulder Colorado Boulder Alex, Alan, Chris, Dave, Hugo, Martin. Matt Geant 2010

  3. Phool Node tree It’s a real chain: Status can be saved on a file at any point Detectors under study implemented as active volumes – granularity is applied later in response. Run Geant once, and then play with detector layout noise, resolution, etc. Geant Hits Detector Hits We can overlay multiple events at input or geant hits level Root File Babies first X-ray (Simulation flow) PHPythia/PHHijing Input Particles Geant 4 Nice plan, but ran into problems when dealing with showers Response Reconstruction

  4. Babies first drawing (B=1T or so we thought) Rendering bug Si EmCal Single pion Pythia Pythia (Geant4 default physics processes)

  5. GEANT4: Q-Pythia Dijet Event One month old @ Columbia Nine months, Geant4 + patch01/02 Single p+ Basically Super Phenix is still in its infancy

  6. Atlas sims @CHEP 2010

  7. Reconstructed secondary vertices due to hadronic interactions in minimum-bias events in the first layer of the Pixel detector (sensitive to interaction length λ complementary to γ conversion studies) C-fiber shell Data Simulation φ φ Cables Already very good, but can be improved ! Bin size: 250 μm Cooling pipe Pixel module • Vertex mass veto applied against γ  ee, KS0 and Λ • Vertex (R, Z) resolution ~ 250 μm (R <10 cm) to ~1 mm Atlas@ICEP2010 7

  8. Hadronic showers http://lcgapp.cern.ch/project/simu/: Report at LHCC comprehensive review , Feb 2010 E. Garutti: LCG Phy. Val. meet. 10 June 2009 CALICE Preliminary LCG Simulation Project

  9. What do we have now • The same as we had in April (with newest G4 patch from Sept 2010) • Implement your own – no problem as long as it’s a perfect cylinder or a rectangular box and made of standard materials • At least it’s modular and integrated into our software framework, so you can easily include/drop detectors on a macro level

  10. Todo • Make it a model for next • generation phenix code • Use only a subset of PHENIX code • 64 bit from the beginning • Database for material/geometry • New root version • Tap into all the work which has been • done for LHC (e.g. interface to event • Generators, geometry for embedding) • Investigate grid computing • basically avoid all mistakes we made • with our previous sims Geant4 is not your old so-so whatever simulation tool anymore which can be ignored because you know better. It will help us to make informed decisions about our detector design

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