X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ITS%2FAliITSsimulationSSD.cxx;h=b28c28803109989f5f936ffa553b04f95ed25b7d;hb=2faa263bda3578f5f6a40aadd02019e0b5671216;hp=2ec2e3bdbd21d66e4c01ec6ea098e92a866e503c;hpb=9e8d6423491af6c5dee355e7ef7c9fb2f1916d80;p=u%2Fmrichter%2FAliRoot.git diff --git a/ITS/AliITSsimulationSSD.cxx b/ITS/AliITSsimulationSSD.cxx index 2ec2e3bdbd2..b28c2880310 100644 --- a/ITS/AliITSsimulationSSD.cxx +++ b/ITS/AliITSsimulationSSD.cxx @@ -1,440 +1,847 @@ +/************************************************************************** + * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * + * * + * Author: The ALICE Off-line Project. * + * Contributors are mentioned in the code where appropriate. * + * * + * Permission to use, copy, modify and distribute this software and its * + * documentation strictly for non-commercial purposes is hereby granted * + * without fee, provided that the above copyright notice appears in all * + * copies and that both the copyright notice and this permission notice * + * appear in the supporting documentation. The authors make no claims * + * about the suitability of this software for any purpose. It is * + * provided "as is" without express or implied warranty. * + **************************************************************************/ + +/* $Id$ */ #include +#include +#include #include +#include +#include +#include "AliITSmodule.h" +#include "AliITSMapA2.h" +#include "AliITSpList.h" +#include "AliITSCalibrationSSD.h" #include "AliITSsegmentationSSD.h" -#include "AliITSresponseSSD.h" -#include "AliITSsimulationSSD.h" -#include "AliITSdictSSD.h" -#include "AliITSdcsSSD.h" +//#include "AliITSdcsSSD.h" #include "AliITS.h" #include "AliITShit.h" -#include "AliITSdigit.h" -#include "AliITSmodule.h" +#include "AliITSdigitSSD.h" #include "AliRun.h" +#include "AliMagF.h" +#include "AliITSgeom.h" +#include "AliITSsimulationSSD.h" +#include "AliITSTableSSD.h" +#include +#include "AliMathBase.h" + +using std::endl; +using std::cout; +ClassImp(AliITSsimulationSSD) +//////////////////////////////////////////////////////////////////////// +// // +// Author: Enrico Fragiacomo // +// enrico.fragiacomo@ts.infn.it // +// Last revised: june 2008 // +// // +// AliITSsimulationSSD is the simulation of SSD. // +//////////////////////////////////////////////////////////////////////// + +//---------------------------------------------------------------------- +AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(), + //fDCS(0), +fMapA2(0), +fIonE(0.0), +fDifConst(), +fDriftVel(), +fTimeResponse(NULL), +fLorentz(kFALSE), +fTanLorAngP(0), +fTanLorAngN(0) +{ + //default Constructor + //Inputs: + // none. + // Outputs: + // none. + // Return: + // A default construction AliITSsimulationSSD class +} +//---------------------------------------------------------------------- +AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp): +AliITSsimulation(dettyp), +//fDCS(0), +fMapA2(0), +fIonE(0.0), +fDifConst(), +fDriftVel(), +fTimeResponse(NULL), +fLorentz(kFALSE), +fTanLorAngP(0), +fTanLorAngN(0) +{ + // Constructor + // Input: + // AliITSDetTypeSim Pointer to the SSD dettype to be used + // Outputs: + // none. + // Return + // A standard constructed AliITSsimulationSSD class + + fTimeResponse = new TF1("ftimeresponse",".5*x*exp(1.-.5*x)"); + Init(); +} +//---------------------------------------------------------------------- +void AliITSsimulationSSD::Init(){ + // Inilizer, Inilizes all of the variable as needed in a standard place. + // Input: + // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used + // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used + // Outputs: + // none. + // Return + // none. + AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); + AliITSSimuParam* simpar = fDetType->GetSimuParam(); + + SetDriftVelocity(); // use default values in .h file + SetIonizeE(); // use default values in .h file + SetDiffConst(); // use default values in .h file + fpList = new AliITSpList(2,GetNStrips()); + fMapA2 = new AliITSMapA2(seg); + SetLorentzDrift(simpar->GetSSDLorentzDrift()); + if (fLorentz) SetTanLorAngle(); +} +//______________________________________________________________________ +Bool_t AliITSsimulationSSD::SetTanLorAngle() { + // This function set the Tangent of the Lorentz angles. + // output: Bool_t : kTRUE in case of success + // -ClassImp(AliITSsimulationSSD); -//------------------------------------------------------------ -AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg, - AliITSresponse *resp){ - // Constructor - + if(!fDetType) { + AliError("AliITSsimulationSPD::SetTanLorAngle: AliITSDetTypeSim* fDetType not set "); + return kFALSE;} - fSegmentation = seg; - fResponse = resp; - fDCS = new AliITSdcsSSD(seg,resp); + AliITSSimuParam* simpar = fDetType->GetSimuParam(); + AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); + if (!fld) AliFatal("The field is not initialized"); + Double_t bz = fld->SolenoidField(); - fNstrips = fSegmentation->Npx(); - fPitch = fSegmentation->Dpx(0); - - fP = new TArrayF(fNstrips+1); - fN = new TArrayF(fNstrips+1); - - fTracksP = new AliITSdictSSD[fNstrips+1]; - fTracksN = new AliITSdictSSD[fNstrips+1]; + fTanLorAngN = TMath::Tan( simpar->LorentzAngleElectron(bz) ); + fTanLorAngP = TMath::Tan( simpar->LorentzAngleHole(bz) ); - - fSteps = 10; // still hard-wired - set in SetDetParam and get it via - // fDCS together with the others eventually + return kTRUE; +} +//______________________________________________________________________ +AliITSsimulationSSD& AliITSsimulationSSD::operator=( + const AliITSsimulationSSD &s){ + // Operator = + + if(this==&s) return *this; + + // this->fDCS = new AliITSdcsSSD(*(s.fDCS)); + this->fMapA2 = s.fMapA2; + this->fIonE = s.fIonE; + this->fDifConst[0] = s.fDifConst[0]; + this->fDifConst[1] = s.fDifConst[1]; + this->fDriftVel[0] = s.fDriftVel[0]; + this->fDriftVel[1] = s.fDriftVel[1]; + this->fTimeResponse = s.fTimeResponse; + this->fLorentz = s.fLorentz; + this->fTanLorAngP = s.fTanLorAngP; + this->fTanLorAngN = s.fTanLorAngN; + return *this; } -//___________________________________________________________________________ -AliITSsimulationSSD& AliITSsimulationSSD::operator=(AliITSsimulationSSD - &source){ -// Operator = - if(this==&source) return *this; - - this->fDCS = new AliITSdcsSSD(*(source.fDCS)); - this->fN = new TArrayF(*(source.fN)); - this->fP = new TArrayF(*(source.fP)); - this->fTracksP = new AliITSdictSSD(*(source.fTracksP)); - this->fTracksN = new AliITSdictSSD(*(source.fTracksN)); - this->fNstrips = source.fNstrips; - this->fPitch = source.fPitch; - this->fSteps = source.fSteps; - return *this; +/* +//______________________________________________________________________ +AliITSsimulation& AliITSsimulationSSD::operator=( + const AliITSsimulation &s){ + // Operator = + + if(this==&s) return *this; + Error("AliITSsimulationSSD","Not allowed to make a = with " + "AliITSsimulationSSD Using default creater instead"); + + return *this; } -//_____________________________________________________________ -AliITSsimulationSSD::AliITSsimulationSSD(AliITSsimulationSSD &source){ +*/ +//______________________________________________________________________ +AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source): + AliITSsimulation(source), +fMapA2(source.fMapA2), +fIonE(source.fIonE), +fDifConst(), +fDriftVel(), +fTimeResponse(source.fTimeResponse), +fLorentz(source.fLorentz), +fTanLorAngP(source.fTanLorAngP), +fTanLorAngN(source.fTanLorAngN) +{ // copy constructor - *this = source; + fDifConst[0] = source.fDifConst[0]; + fDifConst[1] = source.fDifConst[1]; + fDriftVel[0] = source.fDriftVel[0]; + fDriftVel[1] = source.fDriftVel[1]; } -//____________________________________________________________________________ +//______________________________________________________________________ AliITSsimulationSSD::~AliITSsimulationSSD() { - // anihilator - - - if(fP) delete fP; - if(fN) delete fN; - - if(fTracksP) delete [] fTracksP; - if(fTracksN) delete [] fTracksN; + // destructor + delete fMapA2; + delete fTimeResponse; + //delete fDCS; +} +//______________________________________________________________________ +void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){ + // Creates maps to build the list of tracks for each sumable digit + // Inputs: + // Int_t module // Module number to be simulated + // Int_t event // Event number to be simulated + // Outputs: + // none. + // Return + // none. + + SetModuleNumber(module); + SetEventNumber(event); + fMapA2->ClearMap(); + fpList->ClearMap(); +} +//______________________________________________________________________ +void AliITSsimulationSSD::FinishSDigitiseModule(){ + // Does the Sdigits to Digits work + // Inputs: + // none. + // Outputs: + // none. + // Return: + // none. + + FillMapFrompList(fpList); // need to check if needed here or not???? + SDigitToDigit(fModule,fpList); + fpList->ClearMap(); + fMapA2->ClearMap(); +} +//______________________________________________________________________ +void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) { + // Digitizes hits for one SSD module + SetModuleNumber(mod->GetIndex()); + + HitsToAnalogDigits(mod,fpList); + SDigitToDigit(GetModuleNumber(),fpList); + + fpList->ClearMap(); + fMapA2->ClearMap(); +} +//______________________________________________________________________ +void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) { + // Produces Summable/Analog digits and writes them to the SDigit tree. - delete fDCS; + HitsToAnalogDigits(mod,fpList); -} -//_______________________________________________________________ -// -// Hit to digit -//_______________________________________________________________ -// -void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module, - Int_t dummy) { - // Digitizes one SSD module of hits. + WriteSDigits(fpList); - TObjArray *hits = mod->GetHits(); - Int_t nhits = hits->GetEntriesFast(); - if (!nhits) return; - - //printf("simSSD: module nhits %d %d\n",module,nhits); - - Int_t i; - for(i=0; iClearMap(); + fMapA2->ClearMap(); +} +//______________________________________________________________________ +void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){ + // Takes the pList and finishes the digitization. + + ApplyNoise(pList,module); + ApplyCoupling(pList,module); + ApplyDeadChannels(module); + + ChargeToSignal(module,pList); +} +//______________________________________________________________________ +void AliITSsimulationSSD::HitsToAnalogDigits(AliITSmodule *mod, + AliITSpList *pList){ + // Loops over all hits to produce Analog/floating point digits. This + // is also the first task in producing standard digits. + Int_t lasttrack = -2; + Int_t idtrack = -2; + Double_t x0=0.0, y0=0.0, z0=0.0; + Double_t x1=0.0, y1=0.0, z1=0.0; + Double_t de=0.0; + Int_t module = mod->GetIndex(); + Double_t tof = 0.; + + + AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); + + TObjArray *hits = mod->GetHits(); + Int_t nhits = hits->GetEntriesFast(); + if (nhits<=0) return; + AliITSTableSSD * tav = new AliITSTableSSD(GetNStrips()); + module = mod->GetIndex(); + if ( mod->GetLayer() == 6 ) seg->SetLayer(6); + if ( mod->GetLayer() == 5 ) seg->SetLayer(5); + + for(Int_t i=0; iGetHit(i)->GetXL() << " "<GetHit(i)->GetYL(); + cout << " " << mod->GetHit(i)->GetZL(); + cout << endl; + } // end if + if (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) { + + // Scale down dE/dx according to the hit's TOF wrt to the trigger + // Necessary for pileup simulation + // EF - 21/04/09 + tof = mod->GetHit(i)->GetTOF(); + tof *= 1.E+6; // convert time in microsecond + if(tof<2.) de = de * fTimeResponse->Eval(-1.*tof+2.); + else de = 0.; + // + + HitToDigit(module, x0, y0, z0, x1, y1, z1, de,tav); + if (lasttrack != idtrack || i==(nhits-1)) { + GetList(idtrack,i,module,pList,tav); + } // end if + lasttrack=idtrack; + } // end if + } // end loop over hits + delete tav; tav=0; + return; +} +//---------------------------------------------------------------------- +void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0, + Double_t z0, Double_t x1, Double_t y1, + Double_t z1, Double_t de, + AliITSTableSSD *tav) { + + // hit to digit conversion + + AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); + // Turns hits in SSD module into one or more digits. + //Float_t tang[2] = {0.0,0.0}; + //seg->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo + Double_t x, y, z; + Double_t dex=0.0, dey=0.0, dez=0.0; + Double_t pairs; // pair generation energy per step. + Double_t sigma[2] = {0.,0.};// standard deviation of the diffusion gaussian + Double_t tdrift[2] = {0.,0.}; // time of drift + Double_t w; + Double_t inf[2], sup[2], par0[2]; + + // Set up corrections for Lorentz drift (ExB) + Double_t tanLorAngP = fTanLorAngP; + Double_t tanLorAngN = fTanLorAngN; + if(seg->GetLayer()==6) { + tanLorAngP = -1.*fTanLorAngP; + tanLorAngN = -1.*fTanLorAngN; + } + + // Steps in the module are determined "manually" (i.e. No Geant) + // NumOfSteps divide path between entering and exiting hits in steps + Int_t numOfSteps = NumOfSteps(x1, y1, z1, dex, dey, dez); + // Enery loss is equally distributed among steps + de = de/numOfSteps; + pairs = de/GetIonizeE(); // e-h pairs generated + + //----------------------------------------------------- + // stepping + //----------------------------------------------------- + for(Int_t j=0; j (seg->Dy()/2+10)*1.0E-4 ) { + // check if particle is within the detector + Warning("HitToDigit", + "hit out of detector y0=%e,y=%e,dey=%e,j =%d module=%d, exceed=%e", + y0,y,dey,j,module, y-(seg->Dy()/2+10)*1.0E-4); + return; + } // end if + z = z0 + (j+0.5)*dez; + + if(GetDebug(4)) cout <<"HitToDigit "<GetLayer()==6) { + y=-y; // Lay6 module has sensor up-side-down!!! } - for(i=0; iGetHitTrackIndex(i); - HitToDigit(i,idtrack,nhits,hits); + Int_t k; + //--------------------------------------------------------- + // Pside + //------------------------------------------------------------ + k=0; + + // w is the coord. perpendicular to the strips + // Float_t xp=x*1.e+4,zp=z*1.e+4; // microns + Float_t xp=x,zp=z; + + // correction for the Lorentz's angle + if(fLorentz) { + Float_t deltaxp = (y+(seg->Dy()*1.0E-4)/2)*tanLorAngP; + xp+=deltaxp; } - - - - ApplyNoise(); - ApplyCoupling(); - ApplyThreshold(); - ApplyDAQ(); - - -} -//--------------------------------------------------------------- - -void AliITSsimulationSSD::HitToDigit(Int_t & hitNo,Int_t idtrack, - Int_t nhits,TObjArray *hits) { - // Turns one or more hits in an SSD module into one or more digits. - - Int_t stripP, stripN, i; - Float_t dsP, dsN; - Float_t sP, sN; - Float_t eP, eN; - Float_t arrayEP[10]; // hard-wired number of steps - Float_t arrayEN[10]; - Int_t track = -3; - - Float_t ionization = 0; - Float_t signal; + seg->GetPadTxz(xp,zp); - AliITSdictSSD *dict; + // calculate drift time + // y is the minimum path + tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0); - - // check if this is the right order !!!!! - - AliITShit *hitI = (AliITShit*)hits->At(hitNo++); - AliITShit *hitE = (AliITShit*)hits->At(hitNo); - - - while (!((hitE->StatusExiting()) || - (hitE->StatusDisappeared()) || - (hitE->StatusStop()))) { - - if (++hitNoGetIonization(); - hitE = (AliITShit*)hits->At(hitNo); - } - } + w = xp; // P side strip number + + if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { + // this check rejects hits in regions not covered by strips + // 0.5 takes into account boundaries + if(GetDebug(4)) cout << "Dead SSD region, x,z="<GetTrack() == hitE->GetTrack()) - //track = idtrack; - track = hitI->GetTrack(); - else - printf("!!! Emergency !!!\n"); - - - ionization += hitE->GetIonization(); - - const Float_t kconvm=10000.; // cm -> microns - - Float_t xI, yI, zI; - hitI->GetPositionL(xI, yI, zI); + if(sigma[k]==0.0) { + Error("HitToDigit"," sigma[%d]=0",k); + exit(0); + } // end if - xI *= kconvm; - yI *= kconvm; - zI *= kconvm; + par0[k] = pairs; + // we integrate the diffusion gaussian from -3sigma to 3sigma + inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average + sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average + // IntegrateGaussian does the actual + // integration of diffusion gaussian + IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav); - Float_t xE, yE, zE; - hitE->GetPositionL(xE, yE, zE); + //------------------------------------------------------ + // end Pside + //------------------------------------------------------- - xE *= kconvm; - yE *= kconvm; - zE *= kconvm; + //------------------------------------------------------ + // Nside + //------------------------------------------------------- + k=1; - Float_t dx = (xE - xI); - Float_t dz = (zE - zI); - + xp=x; zp=z; + + // correction for the Lorentz's angle + if(fLorentz) { + Float_t deltaxn = ((seg->Dy()*1.0E-4)/2-y)*tanLorAngN; + xp+=deltaxn; + } - // Debuging - /* - fSegmentation->GetPadIxz(xI,zI,stripP,stripN); - - printf("%5d %8.3f %8.3f %8.3f %8.3f %d %d %d\n", - hitNo, xI, zI, dx, dz, - stripP, stripN, track); - printf("%10.5f %10d \n", ionization, hitI->fTrack); - */ + + seg->GetPadTxz(xp,zp); + + tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1); - // end of debuging + //tang[k]=TMath::Tan(tang[k]); + w = zp; // N side strip number - eP=0; - eN=0; + if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { + // this check rejects hits in regions not covered by strips + // 0.5 takes into account boundaries + if(GetDebug(4)) cout << "Dead SSD region, x,z="<Landau(ionization/fSteps, ionization/(4*fSteps)); - // arrayEN[i] = gRandom->Landau(ionization/fSteps, ionization/(4*fSteps)); - arrayEP[i] = ionization/fSteps; - arrayEN[i] = ionization/fSteps; - - eP += arrayEP[i]; - eN += arrayEN[i]; - } - - const Float_t kconv = 1.0e9 / 3.6; // GeV -> e-hole pairs - - for(i=0; iSigmaSpread(sigmaP,sigmaN); - - //printf("SigmaP SigmaN %f %f\n",sigmaP, sigmaN); - - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); - - //printf("NoiseP NoiseN %f %f\n",noiseP, noiseN); - - for(i=0; iGetPadIxz(xI,zI,stripP,stripN); - //printf("hitNo %d i xI zI stripP stripN %d %f %f %d %d\n",hitNo,i,xI, zI, stripP, stripN); - dsP = Get2Strip(1,stripP,xI, zI); // Between 0-1 - dsN = Get2Strip(0,stripN,xI, zI); // Between 0-1 - - //sP = sigmaP * sqrt(300. * i / (fSteps)); - //sN = sigmaN * sqrt(300. * i /(fSteps-i)); - - sP = sigmaP * sqrt(300. * (i+1) / (fSteps)); - sN = sigmaN * sqrt(300. * (i+1) /(fSteps-i)); - - - sP = (i<2 && dsP>0.3 && dsP<0.7)? 20. : sP; // square of (microns) - sN = (i>fSteps-2 && dsN>0.3 && dsN<0.7)? 20. : sN; // square of (microns) - - sP = (i==2 && dsP>0.4 && dsP<0.6)? 15. : sP; // square of (microns) - sN = (i==8 && dsN>0.4 && dsN<0.6)? 15. : sN; // square of (microns) - - - //printf("i=%d SigmaP SigmaN sP sN %f %f %e %e\n",i,sigmaP, sigmaN,sP,sN); - - for (j=-1; j<2; j++) { - if (stripP+j<0 || stripP+j>fNstrips) continue; - signal = arrayEP[i] * TMath::Abs( (F(j+0.5-dsP,sP)-F(j-0.5-dsP,sP)) ); - //printf("SimSSD::HitsToDigits:%d arrayEP[%d]=%e signal=%e\n",j,i,arrayEP[i],signal); - if (signal > noiseP/fSteps) { - (*fP)[stripP+j] += signal; - dict = (fTracksP+stripP+j); - (*dict).AddTrack(track); - } - } // end for j loop over neighboring strips - - for (j=-1; j<2; j++) { - if (stripN+j<0 || stripN+j>fNstrips) continue; - signal = arrayEN[i] * TMath::Abs( (F(j+0.5-dsN,sN)-F(j-0.5-dsN,sN)) ); - //printf("SimSSD::HitsToDigits:%d arrayEN[%d]=%e signal=%e\n",j,i,arrayEN[i],signal); - if (signal > noiseN/fSteps) { - (*fN)[stripN+j] += signal; - dict = (fTracksN+stripN+j); //co to jest - (*dict).AddTrack(track); - } - } // end for j loop over neighboring strips - - xI += dx; - zI += dz; - } + sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]); + sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch + + if(sigma[k]==0.0) { + Error("HitToDigit"," sigma[%d]=0",k); + exit(0); + } // end if + + par0[k] = pairs; + // we integrate the diffusion gaussian from -3sigma to 3sigma + inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average + sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average + // IntegrateGaussian does the actual + // integration of diffusion gaussian + IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav); + + //------------------------------------------------- + // end Nside + //------------------------------------------------- + } // end stepping } - -//____________________________________________________________________ -// -// Private Methods for Simulation //______________________________________________________________________ -// - -void AliITSsimulationSSD::ApplyNoise() { +void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){ // Apply Noise. - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); - - Int_t i; - for(i = 0; iGaus(0,noiseP); - (*fN)[i] += gRandom->Gaus(0,noiseN); - } + Int_t ix; + Double_t signal,noise; + AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); + + // Pside + for(ix=0;ixGaus(0,res->GetNoiseP(ix)); + + // need to calibrate noise + // NOTE. noise from the calibration database comes uncalibrated, + // it needs to be calibrated in order to be added + // to the signal. It will be decalibrated later on together with the noise + noise *= (Double_t) res->GetGainP(ix); + + // noise comes in ADC channels from the calibration database + // It needs to be converted back to electronVolts + noise /= res->GetSSDDEvToADC(1.); + + // Finally, noise is added to the signal + signal = noise + fMapA2->GetSignal(0,ix);//get signal from map + fMapA2->SetHit(0,ix,signal); // give back signal to map + if(signal>0.0) pList->AddNoise(0,ix,module,noise); + } // loop over strip + + // Nside + for(ix=0;ixGaus(0,res->GetNoiseN(ix));// give noise to signal + noise *= (Double_t) res->GetGainN(ix); + noise /= res->GetSSDDEvToADC(1.); + signal = noise + fMapA2->GetSignal(1,ix);//get signal from map + fMapA2->SetHit(1,ix,signal); // give back signal to map + if(signal>0.0) pList->AddNoise(1,ix,module,noise); + } // loop over strip + } - -//_________________________________________________________________________ - -void AliITSsimulationSSD::ApplyCoupling() { - // Apply the effecto of electronic coupling between channels - Int_t i; - for(i = 1; iGetCouplingPL() + (*fP)[i+1]*fDCS->GetCouplingPR(); - (*fN)[i] += (*fN)[i-1]*fDCS->GetCouplingNL() + (*fN)[i+1]*fDCS->GetCouplingNR(); - } +//______________________________________________________________________ +void AliITSsimulationSSD::ApplyCoupling(AliITSpList *pList,Int_t module) { + // Apply the effect of electronic coupling between channels + Int_t ix; + Double_t signal=0; + //AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); + AliITSSimuParam* res = fDetType->GetSimuParam(); + + Double_t *contrLeft = new Double_t[GetNStrips()]; + Double_t *contrRight = new Double_t[GetNStrips()]; + + // P side coupling + for(ix=0;ix0) contrLeft[ix] = fMapA2->GetSignal(0,ix-1)*res->GetSSDCouplingPL(); + else contrLeft[ix] = 0.0; + if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(0,ix+1)*res->GetSSDCouplingPR(); + else contrRight[ix] = 0.0; + } // loop over strips + + for(ix=0;ixGetSSDCouplingPL() * fMapA2->GetSignal(0,ix) + - res->GetSSDCouplingPR() * fMapA2->GetSignal(0,ix); + fMapA2->AddSignal(0,ix,signal); + if(signal>0.0) pList->AddNoise(0,ix,module,signal); + } // loop over strips + + // N side coupling + for(ix=0;ix0) contrLeft[ix] = fMapA2->GetSignal(1,ix-1)*res->GetSSDCouplingNL(); + else contrLeft[ix] = 0.0; + if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(1,ix+1)*res->GetSSDCouplingNR(); + else contrRight[ix] = 0.0; + } // loop over strips + + for(ix=0;ixGetSSDCouplingNL() * fMapA2->GetSignal(0,ix) + - res->GetSSDCouplingNR() * fMapA2->GetSignal(0,ix); + fMapA2->AddSignal(1,ix,signal); + if(signal>0.0) pList->AddNoise(1,ix,module,signal); + } // loop over strips + + + delete [] contrLeft; + delete [] contrRight; } -//__________________________________________________________________________ - -void AliITSsimulationSSD::ApplyThreshold() { - // Applies the effect of a threshold on the signals for digitization. - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); - - // or introduce the SetThresholds in fResponse +//______________________________________________________________________ +void AliITSsimulationSSD::ApplyDeadChannels(Int_t module) { + // Kill dead channels setting gain to zero - Int_t i; - for(i=0; i noiseP*4) ? (*fP)[i] : 0; - (*fN)[i] = ((*fN)[i] > noiseN*4) ? (*fN)[i] : 0; - } - -} + AliITSCalibrationSSD* res = (AliITSCalibrationSSD*)GetCalibrationModel(module); -//__________________________________________________________________________ + for(Int_t i=0;iGetModule("ITS"); + if(res->IsPChannelBad(i)) res->SetGainP(i,0.0); + if(res->IsNChannelBad(i)) res->SetGainN(i,0.0); - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); + } // loop over strips - char opt[30],dummy[20]; - fResponse->ParamOptions(opt,dummy); +} - Int_t i,j; - if (strstr(opt,"SetInvalid")) { - printf("invalid option %s\n",opt); - // Set signal = 0 if invalid strip - for(i=0; iIsValidP(i))) (*fP)[i] = 0; - if (!(fDCS->IsValidN(i))) (*fN)[i] = 0; - } - } - - Int_t digits[3], tracks[3], hits[3]; - Float_t charges[3]; - Float_t phys=0; - for(i=0;i<3;i++) tracks[i]=-3; - for(i=0; iGetNTracks(); j++) { - if(j>2) continue; - if((fTracksP+i)->GetNTracks()) tracks[j]=(fTracksP+i)->GetTrack(j); - else tracks[j]=-2; - //printf("P side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]); - charges[j] = 0; - hits[j] = -1; - } - its->AddSimDigit(2,phys,digits,tracks,hits,charges); - - //cout << (fTracksP+i)->GetNTracks(); - // - //if ((fTracksP+i)->GetNTracks() == 0) { - // cout << d.fCoord2 << " " << d.fSignal << "\n"; - //} - } - - - for(i=0; iGetNTracks(); j++) { - if(j>2) continue; - if((fTracksN+i)->GetNTracks()) tracks[j]=(fTracksN+i)->GetTrack(j); - else tracks[j]=-2; - //printf("N side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]); - charges[j] = 0; - hits[j] = -1; - } - its->AddSimDigit(2,phys,digits,tracks,hits,charges); - - //cout << (fTracksN+i)->GetNTracks(); - //if ((fTracksN+i)->GetNTracks() == 0) { - // cout << d.fCoord2 << " " << d.fSignal << "\n"; - //} - } +//______________________________________________________________________ +Float_t AliITSsimulationSSD::F(Float_t av, Float_t x, Float_t s) { + // Computes the integral of a gaussian using Error Function + Float_t sqrt2 = TMath::Sqrt(2.0); + Float_t sigm2 = sqrt2*s; + Float_t integral; + + integral = 0.5 * AliMathBase::ErfFast( (x - av) / sigm2); + return integral; +} +//______________________________________________________________________ +void AliITSsimulationSSD::IntegrateGaussian(Int_t k,Double_t par, Double_t w, + Double_t sigma, + Double_t inf, Double_t sup, + AliITSTableSSD *tav) { + // integrate the diffusion gaussian + // remind: inf and sup are w-3sigma and w+3sigma + // we could define them here instead of passing them + // this way we are free to introduce asimmetry + + Double_t a=0.0, b=0.0; + Double_t dXCharge1 = 0.0, dXCharge2 = 0.0; + // dXCharge1 and 2 are the charge to two neighbouring strips + // Watch that we only involve at least two strips + // Numbers greater than 2 of strips in a cluster depend on + // geometry of the track and delta rays, not charge diffusion! + + Double_t strip = TMath::Floor(w); // closest strip on the left + + if ( TMath::Abs((strip - w)) < 0.5) { + // gaussian mean is closer to strip on the left + a = inf; // integration starting point + if((strip+0.5)<=sup) { + // this means that the tail of the gaussian goes beyond + // the middle point between strips ---> part of the signal + // is given to the strip on the right + b = strip + 0.5; // integration stopping point + dXCharge1 = F( w, b, sigma) - F(w, a, sigma); + dXCharge2 = F( w, sup, sigma) - F(w ,b, sigma); + }else { + // this means that all the charge is given to the strip on the left + b = sup; + dXCharge1 = 0.9973; // gaussian integral at 3 sigmas + dXCharge2 = 0.0; + } // end if + dXCharge1 = par * dXCharge1;// normalize by mean of number of carriers + dXCharge2 = par * dXCharge2; + + // for the time being, signal is the charge + // in ChargeToSignal signal is converted in ADC channel + fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); + tav->Add(k,(Int_t)strip); + if(((Int_t) strip) < (GetNStrips()-1)) { + // strip doesn't have to be the last (remind: last=GetNStrips()-1) + // otherwise part of the charge is lost + fMapA2->AddSignal(k,((Int_t)strip+1),dXCharge2); + tav->Add(k,((Int_t)(strip+1))); + } // end if + }else{ + // gaussian mean is closer to strip on the right + strip++; // move to strip on the rigth + b = sup; // now you know where to stop integrating + if((strip-0.5)>=inf) { + // tail of diffusion gaussian on the left goes left of + // middle point between strips + a = strip - 0.5; // integration starting point + dXCharge1 = F(w, b, sigma) - F(w, a, sigma); + dXCharge2 = F(w, a, sigma) - F(w, inf, sigma); + }else { + a = inf; + dXCharge1 = 0.9973; // gaussian integral at 3 sigmas + dXCharge2 = 0.0; + } // end if + dXCharge1 = par * dXCharge1; // normalize by means of carriers + dXCharge2 = par * dXCharge2; + // for the time being, signal is the charge + // in ChargeToSignal signal is converted in ADC channel + fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); + tav->Add(k,(Int_t)strip); + if(((Int_t) strip) > 0) { + // strip doesn't have to be the first + // otherwise part of the charge is lost + fMapA2->AddSignal(k,((Int_t)strip-1),dXCharge2); + tav->Add(k,((Int_t)(strip-1))); + } // end if + } // end if +} +//______________________________________________________________________ +Int_t AliITSsimulationSSD::NumOfSteps(Double_t x, Double_t y, Double_t z, + Double_t &dex,Double_t &dey, + Double_t &dez){ + // number of steps + // it also returns steps for each coord + //AliITSsegmentationSSD *seg = new AliITSsegmentationSSD(); + + Double_t step = 25E-4; + //step = (Double_t) seg->GetStepSize(); // step size (cm) + Int_t numOfSteps = (Int_t) (TMath::Sqrt(x*x+y*y+z*z)/step); + + if (numOfSteps < 1) numOfSteps = 1; // one step, at least + //numOfSteps=1; + + // we could condition the stepping depending on the incident angle + // of the track + dex = x/numOfSteps; + dey = y/numOfSteps; + dez = z/numOfSteps; + return numOfSteps; } +//---------------------------------------------------------------------- +void AliITSsimulationSSD::GetList(Int_t label,Int_t hit,Int_t mod, + AliITSpList *pList,AliITSTableSSD *tav) { + // loop over nonzero digits + Int_t ix,i; + Double_t signal=0.; + + for(Int_t k=0; k<2; k++) { + ix=tav->Use(k); + while(ix>-1){ + signal = fMapA2->GetSignal(k,ix); + if(signal==0.0) { + ix=tav->Use(k); + continue; + } // end if signal==0.0 + // check the signal magnitude + for(i=0;iGetNSignals(k,ix);i++){ + signal -= pList->GetTSignal(k,ix,i); + } // end for i + // compare the new signal with already existing list + if(signal>0)pList->AddSignal(k,ix,label,hit,mod,signal); + ix=tav->Use(k); + } // end of loop on strips + } // end of loop on P/N side + tav->Clear(); +} +//---------------------------------------------------------------------- +void AliITSsimulationSSD::ChargeToSignal(Int_t module,const AliITSpList *pList) { + // charge to signal + static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); + Float_t threshold = 0.; + Int_t size = AliITSdigitSSD::GetNTracks(); + Int_t * digits = new Int_t[size]; + Int_t * tracks = new Int_t[size]; + Int_t * hits = new Int_t[size]; + Int_t j1; + Float_t charges[3] = {0.0,0.0,0.0}; + Float_t signal; + AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); + AliITSSimuParam* simpar = fDetType->GetSimuParam(); + + for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) + for(Int_t ix=0;ix gain=0 + if( ((k==0)&&(res->GetGainP(ix)==0)) || ((k==1)&&(res->GetGainN(ix)==0))) continue; + + signal = fMapA2->GetSignal(k,ix); + // signal has to be uncalibrated + // In real life, gains are supposed to be calculated from calibration runs, + // stored in the calibration DB and used in the reconstruction + // (see AliITSClusterFinderSSD.cxx) + if(k==0) signal /= res->GetGainP(ix); + else signal /= res->GetGainN(ix); + + // signal is converted in unit of ADC + signal = res->GetSSDDEvToADC(signal); + if(signal>4095.) signal = 4095.;//if exceeding, accumulate last one + + // threshold for zero suppression is set on the basis of the noise + // A good value is 3*sigma_noise + if(k==0) threshold = res->GetNoiseP(ix); + else threshold = res->GetNoiseN(ix); + + threshold *= simpar->GetSSDZSThreshold(); // threshold at 3 sigma noise + + if(signal < threshold) continue; + //cout<GetNEntries()){ + // only three in digit. + tracks[j1] = pList->GetTrack(k,ix,j1); + hits[j1] = pList->GetHit(k,ix,j1); + }else{ + tracks[j1] = -3; + hits[j1] = -1; + } // end for j1 + // finally add digit + aliITS->AddSimDigit(2,0,digits,tracks,hits,charges); + } // end for ix + } // end for k + delete [] digits; + delete [] tracks; + delete [] hits; +} +//______________________________________________________________________ +void AliITSsimulationSSD::WriteSDigits(AliITSpList *pList){ + // Fills the Summable digits Tree + Int_t i,ni,j,nj; + static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); + + pList->GetMaxMapIndex(ni,nj); + for(i=0;iGetSignalOnly(i,j)>0.0){ + aliITS->AddSumDigit(*(pList->GetpListItem(i,j))); + if(GetDebug(4)) cout << "pListSSD: "<<*(pList->GetpListItem(i,j)) + << endl; + } // end if + } // end for i,j + return; +} +//______________________________________________________________________ +void AliITSsimulationSSD::FillMapFrompList(AliITSpList *pList){ + // Fills fMap2A from the pList of Summable digits + Int_t k,ix; - -//____________________________________________________________________________ - -Float_t AliITSsimulationSSD::F(Float_t x, Float_t s) { - // Computes the integral of a gaussian at the mean valuse x with sigma s. - //printf("SDD:F(%e,%e)\n",x,s); - - Float_t fval=0; - if(s) fval=0.5*TMath::Erf(x * fPitch / s) ; - else { - Error("SSD simulation: F","sigma is zero!!!",s); - } - return fval; -} - + for(k=0;k<2;k++)for(ix=0;ixAddSignal(k,ix,pList->GetSignal(k,ix)); + return; +} +//______________________________________________________________________ +void AliITSsimulationSSD::Print(ostream *os){ + //Standard output format for this class + + //AliITSsimulation::Print(os); + *os << fIonE <<","; + *os << fDifConst[0] <<","<< fDifConst[1] <<","; + *os << fDriftVel[0] <<","<< fDriftVel[1]; + //*os <<","; fDCS->Print(os); + //*os <<","; fMapA2->Print(os); +} //______________________________________________________________________ +void AliITSsimulationSSD::Read(istream *is){ + // Standard output streaming function. + + //AliITSsimulation::Read(is); + *is >> fIonE; + *is >> fDifConst[0] >> fDifConst[1]; + *is >> fDriftVel[0] >> fDriftVel[1]; + //fDCS->Read(is); + //fMapA2->Read(is); +} +//______________________________________________________________________ +ostream &operator<<(ostream &os,AliITSsimulationSSD &source){ + // Standard output streaming function. -Float_t AliITSsimulationSSD::Get2Strip(Int_t flag, Int_t iStrip, Float_t x, Float_t z){ - // Returns the relative space between two strips. + source.Print(&os); + return os; +} +//______________________________________________________________________ +istream &operator>>(istream &os,AliITSsimulationSSD &source){ + // Standard output streaming function. - // flag==1 for Pside, 0 for Nside + source.Read(&os); + return os; +} +//______________________________________________________________________ - Float_t stereoP, stereoN; - fSegmentation->Angles(stereoP,stereoN); - - Float_t tanP=TMath::Tan(stereoP); - Float_t tanN=TMath::Tan(stereoN); - - Float_t dx = fSegmentation->Dx(); - Float_t dz = fSegmentation->Dz(); - x += dx/2; - z += dz/2; - - if (flag) return (x - z*tanP) / fPitch - iStrip; // from 0 to 1 - else return (x - tanN*(dz - z)) / fPitch - iStrip; -} -//____________________________________________________________________________