1. FAIR Simulation & Analysis Framework FairRoot M. Al-Turany, D. Bertini, F. Uhlig GSI-IT

2. 12.07.2007IT-Palaver 2 Overview FairRoot FairRoot new features –Integrated Track follower (Geane) –Geant4 configuration classes –New reader (ROOT converted CAD Step Format ) –Fast Simulation –CMake/CTest FAIR experiments design studies –CBM –PANDA Summary

3. 12.07.2007IT-Palaver 3 FairRoot FairRoot (Former CbmRoot) has started end of 2003 First released in March 2004 Oct 04 release was used to produce data for the CBM technical report June 05 release ( Hades initialization scheme adapted ) Sept. 06 PANDA collaboration decided to use CbmRoot as simulation and analysis framework Oct. 06 CbmRoot was renamed to FairRoot

4. 12.07.2007IT-Palaver 4 Geane Integration in FairRoot The integration into the VMC (TGeant3) is done In FairRoot: –Geane can be used in the analysis or from macro –Propagation to –Length –Plane –Volume (Enter or Exit point) –CbmPoints and/or CbmTrackPar can be used as input for propagation

5. 12.07.2007IT-Palaver 5 What is GEANE? (1) Package to calculate the average trajectories of particles through dense materials and to calculate the transport matrix as well as the propagated errors covariance matrix in a given track representation. Geane is a tool to calculate extrapolated track parameters and propagated errors through dense materials. With VMC it is straight forward to use it.

6. 12.07.2007IT-Palaver 6 What is Geane? (2) It is a track follower: –it predicts the trajectory of a charged particle in terms of mean values and errors both in forward and in backward direction. Three effects are taken into account: energy loss (affects mean values and errors) Coulomb multiple scattering (affects errors only) magnetic field (affects mean values only) Geometry and magnetic fields are handled by Geant3 –(In VMC applications TGeoManager handles the geometry)

7. 12.07.2007IT-Palaver 7 Geane: Muon Absorber in CBM

8. 12.07.2007IT-Palaver 8 Geane : Panda detector

9. 12.07.2007IT-Palaver 9  =1.41  =1.13  =1.19  =0.96  =1.05 Pulls for the whole Panda detector

10. 12.07.2007IT-Palaver 10 Geane Extrapolation (Hades MDC): Module 1 layer 1(D1S1) To Module 4 layer 6 (D4S6) Propagate MC points (No input errors) Geane::PropagateToVolume is used: –Helix track representation Internal representation for Geane (can be transformed) –Pull distributions where not calculated : Error are in the volume frame (have to be transformed to lab)

11. 12.07.2007IT-Palaver 11 Geane: Hades example Hades Simulation Geometry: 28 02 2003 Field map Electrons: –0.05-0.7 GeV –Polar angle range (20., 85.) degree

12. 12.07.2007IT-Palaver 12 Hades Simulation in FairRoot

13. 12.07.2007IT-Palaver 13 Geane (Red) vs. MC (Black)

14. 12.07.2007IT-Palaver 14 Geane (Red) vs. MC (Black)

15. 12.07.2007IT-Palaver 15 New Geometry Reader A standalone STEP to ROOT geometry converter has been implemented by Tobias Stockmanns (PANDA collaboration) The output ROOT file has the geometry but not the full material properties needed by the simulation engines. A reader has been introduced to the framework that read this geometry and replace the media definition by a proper one.

16. 12.07.2007IT-Palaver 16 STEP to ROOT Geometry PANDA MVD detector 9345 volumes

17. 12.07.2007IT-Palaver 17 geant3->SetPAIR(1); geant3->SetCOMP(1); geant3->SetPHOT(1); geant3->SetPFIS(0); geant3->SetDRAY(1); geant3->SetANNI(1); geant3->SetBREM(1); geant3->SetHADR(3); geant3->SetMUNU(1); geant3->SetDCAY(1); geant3->SetLOSS(1); geant3->SetMULS(1); geant3->SetCKOV(1); geant3->SetRAYL(1); … geant3->SetCUTS(…) gconfig/g3Config.C geant4->SetProcess("PAIR",1); /** pair production*/ geant4->SetProcess("COMP",1); /**Compton scattering*/ geant4->SetProcess("PHOT",1); /** photo electric effect */ geant4->SetProcess("PFIS",0); /**photofission*/ geant4->SetProcess("DRAY",1); /**delta-ray*/ geant4->SetProcess("ANNI",1); /**annihilation*/ geant4->SetProcess("BREM",1); /**bremsstrahlung*/ geant4->SetProcess("HADR",1); /**hadronic process*/ geant4->SetProcess("MUNU",1); /**muon nuclear interaction*/ geant4->SetProcess("DCAY",0); /**decay*/ geant4->SetProcess("LOSS",1); /**energy loss*/ geant4->SetProcess("MULS",1); /**multiple scattering*/ geant4->SetProcess("CKOV",1); /**Cerenkov photon generation*/ geant4->SetProcess("RAYL",1); /**Rayleigh scattering*/... … geant4->SetCut("CUTGAM",cut1); /** gammas (GeV)*/ … gconfig/g4Config.C Geant4/Geant3 Configuration

18. 12.07.2007IT-Palaver 18 Full Simulation-Analysis Chain Event Generator Transport Digitizer Hit Finder Reconstruction Physics Analysis Simulation Analysis Determine particle properties at target vertex Transport particles through the detector material Determine detector response Determine physical space point parameters from detector hits Determine momentum vector and PID for all tracks Calculate physics observables Storage Levels SIM RAW

19. 12.07.2007IT-Palaver 19 Fast Simulation-Analysis Chain Event Generator Put the events on the Stack Parameterized detector Response Physics Analysis Determine particle properties at target vertex No Transport Calculate physics observables Storage Levels SIM

20. 12.07.2007IT-Palaver 20 Fast Simulation features All generators available in FairRoot can be used Events from different generators can be mixed Detector response is implemented in Tasks Give a unified output format for all different generators (CbmStack) Fast analysis can be done with TTree::Draw() The same code can be used to make fast simulation using the full simulation transport files (read only primary particles from stack) The same physics analysis code can be used for fast and full simulation Fast and full simulation results can be easily compared

21. 12.07.2007IT-Palaver 21 Fast Simulation: Macro // Load basic libraries gROOT->LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C"); basiclibs(); // Load this example libraries gSystem->Load("libGeoBase"); gSystem->Load("libParBase"); gSystem->Load("libBase"); gSystem->Load("libMCStack"); gSystem->Load("libGen"); gSystem->Load("libPassive"); gSystem->Load("libPGen"); CbmRunSim *fRun = new CbmRunSim(); fRun->SetOutputFile("sim_fast.root");

22. 12.07.2007IT-Palaver 22 Fast Simulation: Macro // Create and Set Event Generator // CbmPrimaryGenerator* primGen = new CbmPrimaryGenerator(); fRun->SetGenerator(primGen); PndDpmGenerator *PndDpm = new PndDpmGenerator("../../input/dpmevt_noelastic_36755.root"); primGen->AddGenerator(PndDpm); /**switch off the transport of particles*/ primGen->DoTracking(kFALSE); fRun->Init(); fRun->Run(1000);

23. 12.07.2007IT-Palaver 23 CMake & CTest Supports complex, large build environments. CMake has been proved in large projects. (KDE 4) Has powerful commands: –include the ability to locate include files, libraries, executables; –include external CMake files that encapsulate standard functionality; interfaces to testing systems; –supports recursive directory traversal with variable inheritance; –can run external programs; –supports conditional builds;....

24. 12.07.2007IT-Palaver 24 CMake & CTest Already in SVN (under testing) Can run in parallel to Automake/Autoconf Need to test: –Nightly Builds –E-mail to the user who has committed his code –Reports See for an example of the web interface: http://www.na-mic.org:8081/Insight/Dashboard/ http://lxg1417.gsi.de:8081

25. 12.07.2007IT-Palaver 25 CMake/CTest : Dashboard

26. 12.07.2007IT-Palaver 26 Dashboard : CBM

27. 12.07.2007IT-Palaver 27 The Panda experiment Multi purpose detector at FAIR  Charmonium (cc) spectroscopy  Open charm spectroscopy  Search for gluonic excitations (hybrids - glueballs)  Charmed hadrons in nuclei  Single and double Hypernuclei  Other options (EFF, GPD, …) Physics program pp, pA collisions 1.5  15 GeV/c (p momentum)

28. 12.07.2007IT-Palaver 28 PANDA Detector implementation: proposed geometry

29. 12.07.2007IT-Palaver 29 Detector implementation: state of art Micro Vertex TPC/STT EMC (barrel/Bkw EndCup) EMC (barrel/Bkw EndCup) Muon Detector EMC (Fwd EndCup) EMC (Fwd EndCup) DIRC (Cherenkov) DIRC (Cherenkov) COILS (dipole) COILS (dipole) COILS (solenoid) COILS (solenoid) view from geometry manager

30. 12.07.2007IT-Palaver 30 Reconstruction example:  c in EMC barrel Clusterization Jan Zhong Dima Melnichuk crystal clustertwo clusters cc  °°  c at rest in lab frame only barrel not yet full coverage cc

31. 12.07.2007IT-Palaver 31 Task example - EMC reconstruction Full reconstruction scheme Migrated from Babar-like framework for PandaRoot Dima Melnychuk (Warsaw)

32. 12.07.2007IT-Palaver 32 Ongoing work New Geane Interface is implemented and under testing Check of Geant4 VMC interface (Physics list) –New G4 physics list for PANDA is needed –Energy cuts can be used directly, but the processes has to be adapted to the new list Check of TFluka VMC interface Use more intensively the TGeoManager services for the reconstruction: –First tests in PANDA MVD and CBM TOF has been made, and they look very promising

33. 12.07.2007IT-Palaver 33 Availability The framework is available via SVN https://subversion.gsi.de/fairroot/ Tested on –Red Hat 9.0 (gcc 3.2.2) –Suse 9.0 (gcc 3.3.1) –Suse 10.1 (gcc 4.1.0) –Debian (gcc 3.2.3) –Fedora Core 2(gcc 3.3.3) –Fedora Core 4 (gcc 4.0.0 ) –Fedora Core 5 (gcc 4.1.0) –Gentoo (gcc 4.1.0) –SL 3 & 4 –64 bit architectures (Debian, Suse)