1. CBM Simulation & Analysis Framework Cbmroot
Mohammad Al-Turany
Denis Bertini
Ilse König

2. CBM Framework: Features
The same framework can be used for Simulation and Analysis
Fully ROOT based:
VMC for simulation
Geometry Modeller (TGeoManager) : Overlaps checking, visualization and/or navigation system of G3
IO scheme (TChain, friend TTrees, TFolders ) for persistency
TTask to organize analysis data flow
Completely configurable via ROOT macros
Easy to maintain (only ROOT standard services are used)
Reuse of HADES Geometry Interface.
Reuse of HADES Parameter containers.
Event merging before and/or after transport
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3. CBM Collaboration Meeting
CBM Simulation (Old)
ROOT
Geant3
Geometry
Manager
Virtual MC
Geant4
Root files
MCPoints,
Configuration
Magnet
FLUKA
Target
IO Manager
GeoInterface
Run Manager
PIPE
Primary
Generator
Cave
Module
STS
Magnetic
Field
Detector
Tasks
Urqmd
EVGEN
TRD
Pluto
TOF
Particle
Generator
RICH
Delta
Tracking
Field Map
ASCII
ECAL
digitizers
CBM Collaboration Meeting

4. Configuration, Parameters,
CBM Simulation
ROOT
Geant3
Root files
MCPoints
Geometry
Manager
Virtual MC
Magnet
Geant4
Target
FLUKA
PIPE
Oracle
Configuration, Parameters,
Geometry
GeoInterface
Run Manager
IO Manager
Cave
RunTime
DataBase
Module
Primary
Generator
STS
Root files
Configuration,
Parameters,
Geometry
TRD
Magnetic
Field
Detector
Tasks
EVGEN
TOF
RICH
Field Map
Particle
Generator
ECAL
ASCII
Urqmd
Pluto
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5. CBM Collaboration Meeting
CBM Analysis (Old)
ROOT
ROOT FILES
Input: MC Points, Configuration
Output: Hits, Digits, Tracks
Geometry
Manager
Virtual MC
IO Manager
GeoInterface
Run Manager
Primary
Generator
Module
Magnetic
Field
Detector
Tasks
EVGEN
Delta
Tracking
digitizers
CBM Collaboration Meeting

6. Configuration, Parameters,
CBM Analysis
Root files
MCPoints, Hits,
Digits, Tracks
IO Manager
GeoInterface
Run Manager
Oracle
Configuration, Parameters,
Geometry
RunTime
DataBase
Module
Primary
Generator
Magnetic
Field
Detector
Tasks
EVGEN
Root files
Configuration,
Parameters,
Geometry
Delta
digitizers
Tracking
CBM Collaboration Meeting

7. CBM Geometry Interface
Use the copy mechanism
reduce the size of ASCII files
Reduce the number of Volumes in Geant
Improve Geant tracking performance
Oracle interface
Hades geometry table design reusable
Advantage:
more flexibility : different inputs can be used.
closer to technical drawings and analysis coordinate systems
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8. Material & Geometry Interface
Oracle DB
TGeo Geometry/Material
TGeoVolume
TGeoNode
TGeoMaterial
CbmGeoInterface
ASCII
G3 Geometry/Material
G3Builder
RootBuilder
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9. Simulation Macro – loading Libs
// Load basic libraries
gROOT->LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C");
basiclibs();
// Load Cbmroot libraries
gSystem->Load("libGeoBase");
gSystem->Load("libCbm");
gSystem->Load("libPassive");
gSystem->Load("libGen");
gSystem->Load("libSts");
gSystem->Load("libTrd");
gSystem->Load("libTof");
gSystem->Load("libRich");
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10. CBM Collaboration Meeting
Simulation Macro
//create the Simulation Run Class
CbmRunSim *fRun = new CbmRunSim();
// set the MC version used
fRun->SetName("TGeant3"); //for G4 use "TGeant4"
fRun->SetGeoModel("G3Native"); //use G3 native geometry
// chose an output file name
fRun->SetOutputFile("test.root");
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11. Simulation Macro- Create Modules
CbmModule *Cave= new CbmCave("WORLD");
Cave->SetGeometryFileName("PASSIVE/CAVE", "v03a");
fRun->AddModule(Cave);
CbmModule *Target= new CbmTarget("Target");
Target->SetGeometryFileName("PASSIVE/TARGET", "v03a");
fRun->AddModule(Target);
CbmModule *Pipe= new CbmPIPE("PIPE");
Pipe->SetGeometryFileName("PASSIVE/PIPE", "v03a");
fRun->AddModule(Pipe);
CbmModule *Magnet= new CbmMagnet("MAGNET");
Magnet->SetGeometryFileName("PASSIVE/MAGNET", "v03a");
fRun->AddModule(Magnet);
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12. Simulation Macro- Create Detectors
CbmDetector *STS= new CbmSts("STS", kTRUE);
STS->SetGeometryFileName("STS/STS", "v03c");
fRun->AddModule(STS);
CbmDetector *TOF= new CbmTof("TOF", kTRUE );
TOF->SetGeometryFileName("TOF/TOF", "v03_v10");
fRun->AddModule(TOF);
CbmDetector *TRD= new CbmTRD("TRD",kFALSE );
TRD->SetGeometryFileName("TRD/TRD", "v04b_9" );
fRun->AddModule(TRD);
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13. Simulation Macro-Event Generators
CbmPrimaryGenerator *priGen= new CbmPrimaryGenerator();
fRun->SetGenerator(priGen);
CbmUrqmdGenerator *fGen1= new CbmUrqmdGenerator("00-03fm.100ev.f14");
CbmPlutoGenerator *fGen2= new CbmPlutoGenerator("jpsi.root");
CbmParticleGenerator *fGen3= new CbmParticleGenerator();
fRun->AddGenerator(fGen1);
fRun->AddGenerator(fGen2);
fRun->AddGenerator(fGen3);
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14. Simulation Macro-Magnetic Field
// setting a field map
CbmFieldMap *fMagField= new CbmFieldMap("FIELD.v03b.map");
// setting a constant field
CbmConstField *fMagField=new CbmConstField();
fMagField->SetFieldXYZ(0, 30 ,0 ); // values are in kG
// MinX=-75, MinY=-40,MinZ=-12 ,MaxX=75, MaxY=40 ,MaxZ=124 );
fMagField->SetFieldRegions(-74, -39 ,-22 , 74, 39 , 160 ); // values are in cm
fRun->SetField(fMagField);
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15. Simulation Macro- Run Simulation
fRun->Init(); // Initialize the simulation
Simulation:
1. Initialize the VMC (Simulation)
2. Initialize Tasks (if they are used in Simulation)
fRun->Run(NoOfEvent); //Run the Simulation
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16. Saving Parameters: ROOT Files
//Fill the Parameter containers for this run */
CbmRuntimeDb *rtdb=fRun->GetRuntimeDb();
rtdb->addRun(1); //add run with run Id
CbmParRootFileIo* output=new CbmParRootFileIo();
output->open("SimPar.root","RECREATE");
rtdb->setOutput(output);
CbmBaseParSet* par=(CbmBaseParSet*)(rtdb->getContainer("CbmBaseParSet"));
par->SetField(fMagField);
par->SetGen(primGen);
par->setChanged();
par->setInputVersion(1,1);
rtdb->saveOutput();
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17. Saving Parameters: Oracle
gSystem->Load ( "libOra" );
CbmRuntimeDb* rtdb=fRun->GetRuntimeDb();
CbmParOraIo* ora=new CbmParOraIo;
ora->open("cbm_sts_oper");
rtdb->setOutput(ora);
CbmParTest* par=(CbmParTest*)(rtdb->getContainer("CbmParTest"));
par->setAuthor("M. Al-Turany");
par->setDescription("Analysis interface test");
par->write(ora);
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18. CBM Collaboration Meeting
Analysis Macro {
gROOT->LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C");
basiclibs();
gSystem->Load("libCbm");
gSystem->Load("libTrack");
CbmRunAna *fRun= new CbmRunAna();
fRun->SetInputFile(“/d/STS_AuAu25Gev_Urqmd.root");
fRun->SetOutputFile(“trackOutput.root");
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19. Analysis Macro: Reading Parameters
CbmTrack *tr= new CbmTrack("Tracking Algorithm");
fRun->AddTask(tr);
CbmRuntimeDb* rtdb=fRun->GetRuntimeDb();
CbmParRootFileIo* input=new CbmParRootFileIo();
input->open("test.root");
rtdb->setFirstInput(input);
CbmBaseParSet* par =
(CbmBaseParSet*)(rtdb->getContainer ("CbmBaseParSet") );
rtdb->initContainers(1); // runId = 1
par->print();
fRun->Init();
fRun->Run();
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20. Reading Parameters: Oracle
gSystem->Load ( "libOra" );
CbmRunAna * fRun = new CbmRunAna();
CbmRuntimeDb* rtdb=fRun->GetRuntimeDb();
CbmParOraIo* ora=new CbmParOraIo();
ora->open();
rtdb->setFirstInput(ora);
CbmGenericParOraIo* genio=
(CbmGenericParOraIo*)(ora->getDetParIo("CbmGenericParIo"));
CbmParTest* par=(CbmParTest*)(rtdb->getContainer("CbmParTest"));
genio->readFromLoadingTable(par,1); // runId =1
par->print();
par->printParams();
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21. CBM Collaboration Meeting
Chaining root files
Chaining mechanism supported in the Analysis:
{ // …
CbmRunAna *fRun = new CbmRunAna();
fRun->SetInputFile(“myfile1.root”);
fRun->AddFile(“myfile2.root”);
fRun->AddFile(“myfile3.root”);
// loop over all entries
fRun->Run(); }
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22. CBM Collaboration Meeting
Summary
The G3 Native geometry builder is implemented, the validation of the modified G3 is being performed. (TGeo as a navigation system for G3)
Inconsistency in the Cerenkov effect has been found and a report has been send to the VMC group.
Hades spectrometer has been fully integrated
Gives us the opportunity to tune Geant4 (cuts/physics list …) and compare with real Data !
Validate TGeo and G3 with data
Realistic test of the framework.
HADES Parameter containers are implemented and ready to use
The Hades Oracle interface is integrated within the framework
CBM Collaboration Meeting