X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ITS%2FAliITSsimulationSSD.cxx;h=8904fc0a3a43d318502860d92a7c71cb82bee395;hb=3d45e923dc724fea4e5ba0380aba4a2021c22bd8;hp=b86e5bdc513d62ce3176c570b27742dabd4825ba;hpb=1c67ee115d7f08ed3b3df786e4808eaa1dbf760f;p=u%2Fmrichter%2FAliRoot.git diff --git a/ITS/AliITSsimulationSSD.cxx b/ITS/AliITSsimulationSSD.cxx index b86e5bdc513..8904fc0a3a4 100644 --- a/ITS/AliITSsimulationSSD.cxx +++ b/ITS/AliITSsimulationSSD.cxx @@ -12,91 +12,90 @@ * 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 #include -#include -#include #include "AliITSmodule.h" #include "AliITSMapA2.h" #include "AliITSpList.h" -#include "AliITSresponseSSD.h" +#include "AliITSCalibrationSSD.h" #include "AliITSsegmentationSSD.h" -#include "AliITSdcsSSD.h" +//#include "AliITSdcsSSD.h" #include "AliITS.h" #include "AliITShit.h" +#include "AliITSdigitSSD.h" #include "AliRun.h" #include "AliITSgeom.h" #include "AliITSsimulationSSD.h" #include "AliITSTableSSD.h" +//#include "AliITSresponseSSD.h" -ClassImp(AliITSsimulationSSD); +ClassImp(AliITSsimulationSSD) +//////////////////////////////////////////////////////////////////////// +// // +// Author: Enrico Fragiacomo // +// enrico.fragiacomo@ts.infn.it // +// Last revised: march 2006 // +// // +// AliITSsimulationSSD is the simulation of SSD. // //////////////////////////////////////////////////////////////////////// -// Version: 0 -// Written by Enrico Fragiacomo -// July 2000 -// -// AliITSsimulationSSD is the simulation of SSDs. //---------------------------------------------------------------------- -AliITSsimulationSSD::AliITSsimulationSSD(){ - //default Constructor - - fDCS = 0; - fDifConst[0] = fDifConst[1] = 0.0; - fDriftVel[0] = fDriftVel[1] = 0.0; - fMapA2 = 0; -// fpList = 0; +AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(), + //fDCS(0), +fMapA2(0), +fIonE(0.0), +fDifConst(), +fDriftVel(){ + //default Constructor + //Inputs: + // none. + // Outputs: + // none. + // Return: + // A default construction AliITSsimulationSSD class } //---------------------------------------------------------------------- -AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg, - AliITSresponse *resp){ +AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp): +AliITSsimulation(dettyp), +//fDCS(0), +fMapA2(0), +fIonE(0.0), +fDifConst(), +fDriftVel(){ // Constructor // Input: - // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used - // AliITSresponseSSD *resp Pointer to the SSD responce class to be used + // AliITSDetTypeSim Pointer to the SSD dettype to be used // Outputs: // none. // Return - // none. + // A standard constructed AliITSsimulationSSD class - fDCS = 0; - fDifConst[0] = fDifConst[1] = 0.0; - fDriftVel[0] = fDriftVel[1] = 0.0; - fMapA2 = 0; -// fpList = 0; - Init((AliITSsegmentationSSD*)seg,(AliITSresponseSSD*)resp); + Init(); } //---------------------------------------------------------------------- -void AliITSsimulationSSD::Init(AliITSsegmentationSSD *seg, - AliITSresponseSSD *resp){ - // Inilizer, Inilizes all of the variable as needed in a standard place. - // Input: - // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used - // AliITSresponseSSD *resp Pointer to the SSD responce class to be used - // Outputs: - // none. - // Return - // none. - - fSegmentation = seg; - fResponse = resp; - Float_t noise[2] = {0.,0.}; - fResponse->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters - fDCS = new AliITSdcsSSD(seg,resp); - - 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(fSegmentation); +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); + + 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); } //______________________________________________________________________ AliITSsimulationSSD& AliITSsimulationSSD::operator=( @@ -105,7 +104,7 @@ AliITSsimulationSSD& AliITSsimulationSSD::operator=( if(this==&s) return *this; - this->fDCS = new AliITSdcsSSD(*(s.fDCS)); + // this->fDCS = new AliITSdcsSSD(*(s.fDCS)); this->fMapA2 = s.fMapA2; this->fIonE = s.fIonE; this->fDifConst[0] = s.fDifConst[0]; @@ -115,16 +114,34 @@ AliITSsimulationSSD& AliITSsimulationSSD::operator=( return *this; } //______________________________________________________________________ -AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source){ - // copy constructor +AliITSsimulation& AliITSsimulationSSD::operator=( + const AliITSsimulation &s){ + // Operator = - *this = source; + if(this==&s) return *this; + Error("AliITSsimulationSSD","Not allowed to make a = with " + "AliITSsimulationSSD Using default creater instead"); + + return *this; +} +//______________________________________________________________________ +AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source): + AliITSsimulation(source), +fMapA2(source.fMapA2), +fIonE(source.fIonE), +fDifConst(), +fDriftVel(){ + // copy constructor + fDifConst[0] = source.fDifConst[0]; + fDifConst[1] = source.fDifConst[1]; + fDriftVel[0] = source.fDriftVel[0]; + fDriftVel[1] = source.fDriftVel[1]; } //______________________________________________________________________ AliITSsimulationSSD::~AliITSsimulationSSD() { // destructor delete fMapA2; - delete fDCS; + //delete fDCS; } //______________________________________________________________________ void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){ @@ -137,8 +154,8 @@ void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){ // Return // none. - fModule = module; - fEvent = event; + SetModuleNumber(module); + SetEventNumber(event); fMapA2->ClearMap(); fpList->ClearMap(); } @@ -152,81 +169,81 @@ void AliITSsimulationSSD::FinishSDigitiseModule(){ // Return: // none. - FillMapFrompList(fpList); // need to check if needed here or not???? - SDigitToDigit(fModule,fpList); - fpList->ClearMap(); - fMapA2->ClearMap(); + FillMapFrompList(fpList); // need to check if needed here or not???? + SDigitToDigit(fModule,fpList); + fpList->ClearMap(); + fMapA2->ClearMap(); } //______________________________________________________________________ -void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod, - Int_t dummy0,Int_t dummy1) { +void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) { // Digitizes hits for one SSD module - Int_t module = mod->GetIndex(); - + SetModuleNumber(mod->GetIndex()); + HitsToAnalogDigits(mod,fpList); - SDigitToDigit(module,fpList); - + SDigitToDigit(GetModuleNumber(),fpList); + fpList->ClearMap(); fMapA2->ClearMap(); } //______________________________________________________________________ -void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t dummy0, - Int_t dummy1) { +void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) { // Produces Summable/Analog digits and writes them to the SDigit tree. - HitsToAnalogDigits(mod,fpList); + HitsToAnalogDigits(mod,fpList); - WriteSDigits(fpList); - - fpList->ClearMap(); - fMapA2->ClearMap(); + WriteSDigits(fpList); + + fpList->ClearMap(); + fMapA2->ClearMap(); } //______________________________________________________________________ void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){ // Takes the pList and finishes the digitization. - - // FillMapFrompList(pList); //commented out to avoid double counting of the - //charge - + ApplyNoise(pList,module); ApplyCoupling(pList,module); - - ChargeToSignal(pList); + 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(); - + 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(); + + 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 ) GetSegmentation()->SetLayer(6); - if ( mod->GetLayer() == 5 ) GetSegmentation()->SetLayer(5); + 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; - if (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) { - 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; + // LineSegmentL returns 0 if the hit is entering + // If hits is exiting returns positions of entering and exiting hits + // Returns also energy loss + if(GetDebug(4)){ + cout << i << " "; + cout << mod->GetHit(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)) { + 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; @@ -236,365 +253,443 @@ 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) { - // Turns hits in SSD module into one or more digits. - Float_t tang[2] = {0.0,0.0}; - GetSegmentation()->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]; - - // 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 - for(Int_t j=0; j (GetSegmentation()->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 =%e", - y0,y,dey,j); - return; - } // end if - z = z0 + (j+0.5)*dez; -// cout <<"HitToDigit "<Dy()*1.0E-4)/2)/GetDriftVelocity(0); - tdrift[1] = ((GetSegmentation()->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1); - - for(Int_t k=0; k<2; k++) { // both sides remember: 0=Pside 1=Nside - - tang[k]=TMath::Tan(tang[k]); - - // w is the coord. perpendicular to the strips - /* - if(k==0) { - w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) - - (z+(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k]; - }else{ - w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) + - (z-(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k]; - } // end if - w /= (GetStripPitch()*1.0E-4); // w is converted in units of pitch - */ - { // replacement block for the above. - Float_t xp=x*1.E-4,zp=z*1.e-4; // microns - GetSegmentation()->GetPadTxz(xp,zp); - if(k==0) w = xp; // P side strip number - else w = zp; // N side strip number - } // end test block - - if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { - // this check rejects hits in regions not covered by strips - // 0.5 takes into account boundaries - return; // There are dead region on the SSD sensitive volume. - } // end if - - // sigma is the standard deviation of the diffusion gaussian - if(tdrift[k]<0) return; - 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 for loop over side (0=Pside, 1=Nside) - } // end stepping + + // 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]; + + // 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 + 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 "<Dy()*1.0E-4)/2)/GetDriftVelocity(0); + tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1); + + for(Int_t k=0; k<2; k++) { // both sides remember: 0=Pside 1=Nside + + tang[k]=TMath::Tan(tang[k]); + + // w is the coord. perpendicular to the strips + Float_t xp=x*1.e+4,zp=z*1.e+4; // microns + seg->GetPadTxz(xp,zp); + if(k==0) w = xp; // P side strip number + else w = zp; // N 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 << "x,z="<GetNoiseParam(a,b); // retrieves noise parameters - noiseP[0] = (Double_t) a; noiseP[1] = (Double_t) b; - for(k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) - for(ix=0;ixGaus(0,noiseP[k]);// get noise to signal - signal = noise + fMapA2->GetSignal(k,ix);//get signal from map - if(signal<0.) signal=0.0; // in case noise is negative... - fMapA2->SetHit(k,ix,signal); // give back signal to map - if(signal>0.0) pList->AddNoise(k,ix,module,noise); - } // loop over strip - } // loop over k (P or N side) + AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); + + // Pside + for(ix=0;ixGaus(0,res->GetNoiseP().At(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->GetDEvToADC(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().At(ix));// give noise to signal + noise *= (Double_t) res->GetGainN(ix); + noise /= res->GetDEvToADC(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(AliITSpList *pList,Int_t module) { // Apply the effect of electronic coupling between channels Int_t ix; - Double_t signalLeft=0, signalRight=0,signal=0; - + Double_t signal=0; + AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); + + Double_t *contrLeft = new Double_t[GetNStrips()]; + Double_t *contrRight = new Double_t[GetNStrips()]; + + // P side coupling for(ix=0;ix0.)signalLeft = fMapA2->GetSignal(0,ix-1)*fDCS->GetCouplingPL(); - else signalLeft = 0.0; - if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(0,ix+1)* - fDCS->GetCouplingPR(); - else signalRight = 0.0; - signal = signalLeft + signalRight; - fMapA2->AddSignal(0,ix,signal); - if(signal>0.0) pList->AddNoise(0,ix,module,signal); - - signalLeft = signalRight = signal = 0.0; - // N side coupling - if(ix>0.) signalLeft = fMapA2->GetSignal(1,ix-1)*fDCS->GetCouplingNL(); - else signalLeft = 0.0; - if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(1,ix+1)* - fDCS->GetCouplingNR(); - else signalRight = 0.0; - signal = signalLeft + signalRight; - fMapA2->AddSignal(1,ix,signal); - if(signal>0.0) pList->AddNoise(1,ix,module,signal); + if(ix>0) contrLeft[ix] = fMapA2->GetSignal(0,ix-1)*res->GetCouplingPL(); + else contrLeft[ix] = 0.0; + if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(0,ix+1)*res->GetCouplingPR(); + else contrRight[ix] = 0.0; } // loop over strips + + for(ix=0;ixGetCouplingPL() * fMapA2->GetSignal(0,ix) + - res->GetCouplingPR() * 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->GetCouplingNL(); + else contrLeft[ix] = 0.0; + if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(1,ix+1)*res->GetCouplingNR(); + else contrRight[ix] = 0.0; + } // loop over strips + + for(ix=0;ixGetCouplingNL() * fMapA2->GetSignal(0,ix) + - res->GetCouplingNR() * 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::ApplyDeadChannels(Int_t module) { + // Kill dead channels setting gain to zero + + Int_t deadentries; + + AliITSCalibrationSSD* res = (AliITSCalibrationSSD*)GetCalibrationModel(module); + + deadentries = res->GetDeadPChannelsList().GetSize(); + //cout<AddGainP(res->GetDeadPChannelsList().At(i),0.0); + } + + deadentries = res->GetDeadNChannelsList().GetSize(); + for(Int_t i=0; iAddGainN(res->GetDeadNChannelsList().At(i),0.0); + } + +} + //______________________________________________________________________ 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; + // 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 * TMath::Erf( (x - av) / sigm2); - return integral; + integral = 0.5 * TMath::Erf( (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 + // 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 - - // we could condition the stepping depending on the incident angle - // of the track - dex = x/numOfSteps; - dey = y/numOfSteps; - dez = z/numOfSteps; - - return numOfSteps; + 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) { + // loop over nonzero digits + Int_t ix,i; + Double_t signal=0.; + + for(Int_t k=0; k<2; k++) { 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(); + 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(AliITSpList *pList) { - // charge to signal - static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); - Float_t threshold = 0.; - Int_t digits[3], tracks[3],hits[3],j1; - Float_t charges[3] = {0.0,0.0,0.0}; - Float_t signal; - Float_t noise[2] = {0.,0.}; - - ((AliITSresponseSSD*)fResponse)->GetNoiseParam(noise[0],noise[1]); - - for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) - // Threshold for zero-suppression - // It can be defined in AliITSresponseSSD - // threshold = (Float_t)fResponse->MinVal(k); - // I prefer to think adjusting the threshold "manually", looking - // at the scope, and considering noise standard deviation - threshold = 4.0*noise[k]; // 4 times noise is a choice - for(Int_t ix=0;ixGetSignal(k,ix) <= threshold)continue; - // convert to ADC signal - signal = ((AliITSresponseSSD*)fResponse)->DEvToADC( - fMapA2->GetSignal(k,ix)); - if(signal>1024.) signal = 1024.;//if exceeding, accumulate last one - digits[0] = k; - digits[1] = ix; - digits[2] = (Int_t) signal; - for(j1=0;j1<3;j1++){ // only three in digit. - tracks[j1] = pList->GetTrack(k,ix,j1); - hits[j1] = pList->GetHit(k,ix,j1); - } // end for j1 - // finally add digit - aliITS->AddSimDigit(2,0,digits,tracks,hits,charges); - } // end for ix - } // end for k +void AliITSsimulationSSD::ChargeToSignal(Int_t module,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); + + 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->GetDEvToADC(signal); + if(signal>4096.) signal = 4096.;//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().At(ix); + else threshold = res->GetNoiseN().At(ix); + threshold *= res->GetZSThreshold(); // threshold at 3 sigma noise + if(signal < threshold) continue; + + digits[0] = k; + digits[1] = ix; + digits[2] = TMath::Nint(signal); + for(j1=0;j1GetNEntries()){ + // 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))); -// cout << "pListSSD: " << *(pList->GetpListItem(i,j)) << endl; - } // end if - } // end for i,j + // 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; + // Fills fMap2A from the pList of Summable digits + Int_t k,ix; - for(k=0;k<2;k++)for(ix=0;ixAddSignal(k,ix,pList->GetSignal(k,ix)); - return; + 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); + //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); + // 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. + // Standard output streaming function. - source.Print(&os); - return os; + source.Print(&os); + return os; } //______________________________________________________________________ istream &operator>>(istream &os,AliITSsimulationSSD &source){ - // Standard output streaming function. + // Standard output streaming function. - source.Read(&os); - return os; + source.Read(&os); + return os; } //______________________________________________________________________