X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;ds=sidebyside;f=ITS%2FAliITSsimulationSSD.cxx;h=593ee7ef060e9f85d6facabf43b75560b1ef6b24;hb=4937011491cee0d38325e84b8ac354e2344be487;hp=27650cf59b8108016670cdcd76761d5d730dcfc8;hpb=e81897071a6c895e2796d84a2531f1385a0a1017;p=u%2Fmrichter%2FAliRoot.git diff --git a/ITS/AliITSsimulationSSD.cxx b/ITS/AliITSsimulationSSD.cxx index 27650cf59b8..593ee7ef060 100644 --- a/ITS/AliITSsimulationSSD.cxx +++ b/ITS/AliITSsimulationSSD.cxx @@ -1,407 +1,622 @@ +/************************************************************************** + * 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 "AliITSsimulationSSD.h" -#include "AliITSdictSSD.h" +#include +#include +#include +#include + +#include "AliITSmodule.h" +#include "AliITSMapA2.h" +#include "AliITSpList.h" +#include "AliITSresponseSSD.h" +#include "AliITSsegmentationSSD.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" ClassImp(AliITSsimulationSSD); -//------------------------------------------------------------ -AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg, - AliITSresponse *resp){ - // Constructor - - fSegmentation = seg; - fResponse = resp; - fDCS = new AliITSdcsSSD(seg,resp); - - 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]; +//////////////////////////////////////////////////////////////////////// +// Version: 0 +// Written by Enrico Fragiacomo +// July 2000 +// +// AliITSsimulationSSD is the simulation of SSDs. - - fSteps = 10; // still hard-wired - set in SetDetParam and get it via - // fDCS together with the others eventually +//---------------------------------------------------------------------- +AliITSsimulationSSD::AliITSsimulationSSD(){ + //default Constructor + fDCS = 0; + fDifConst[0] = fDifConst[1] = 0.0; + fDriftVel[0] = fDriftVel[1] = 0.0; + fMapA2 = 0; +// fpList = 0; +} +//---------------------------------------------------------------------- +AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg, + AliITSresponse *resp){ + // Constructor + // 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. + + fDCS = 0; + fDifConst[0] = fDifConst[1] = 0.0; + fDriftVel[0] = fDriftVel[1] = 0.0; + fMapA2 = 0; + SetDebug(kFALSE); +// fpList = 0; + Init((AliITSsegmentationSSD*)seg,(AliITSresponseSSD*)resp); } -//___________________________________________________________________________ -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; +//---------------------------------------------------------------------- +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); } -//_____________________________________________________________ -AliITSsimulationSSD::AliITSsimulationSSD(AliITSsimulationSSD &source){ +//______________________________________________________________________ +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]; + return *this; +} +//______________________________________________________________________ +AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source): + AliITSsimulation(source){ // copy constructor - *this = source; + + *this = source; } -//____________________________________________________________________________ +//______________________________________________________________________ AliITSsimulationSSD::~AliITSsimulationSSD() { - // anihilator - - if(fP) delete fP; - if(fN) delete fN; - - if(fTracksP) delete fTracksP; - if(fTracksN) delete fTracksN; + // destructor + delete fMapA2; + 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. + + fModule = module; + fEvent = 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 dummy0,Int_t dummy1) { + // Digitizes hits for one SSD module + Int_t module = mod->GetIndex(); - delete fDCS; -} -//_______________________________________________________________ -// -// Hit to digit -//_______________________________________________________________ -// -void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module, - Int_t dummy) { - // Digitizes one SSD module of hits. - - TObjArray *hits = mod->GetHits(); - Int_t nhits = hits->GetEntriesFast(); - if (!nhits) return; - - Int_t i; - for(i=0; iGetHitTrackIndex(i); - HitToDigit(i,idtrack,nhits,hits); - } - - - - ApplyNoise(); - ApplyCoupling(); - ApplyThreshold(); - ApplyDAQ(); - + dummy0 = dummy1 = 0; // remove unused variable warning. + HitsToAnalogDigits(mod,fpList); + SDigitToDigit(module,fpList); + fpList->ClearMap(); + fMapA2->ClearMap(); } +//______________________________________________________________________ +void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t dummy0, + Int_t dummy1) { + // Produces Summable/Analog digits and writes them to the SDigit tree. -//--------------------------------------------------------------- - -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 = -1; - - Float_t ionization = 0; - Float_t signal; - - AliITSdictSSD *dict; - - - // 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); - } - } - - - if (hitI->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); - - xI *= kconvm; - yI *= kconvm; - zI *= kconvm; - - Float_t xE, yE, zE; - hitE->GetPositionL(xE, yE, zE); - - xE *= kconvm; - yE *= kconvm; - zE *= kconvm; - - Float_t dx = (xE - xI); - Float_t dz = (zE - zI); - - - // 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); - */ - - // end of debuging - - - eP=0; - eN=0; - - for (i=0; iLandau(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 = (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) - - 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; - } - - + dummy0 = dummy1 = 0; // remove unused variable warning + HitsToAnalogDigits(mod,fpList); + + 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); -//____________________________________________________________________ -// -// Private Methods for Simulation + ChargeToSignal(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(); -void AliITSsimulationSSD::ApplyNoise() { + 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); + 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; + } // 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) { + // 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 module=%d", + y0,y,dey,j,module); + 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 + //cout << "x,z="<GetNoiseParam(noiseP,noiseN); - - Int_t i; - for(i = 0; iGaus(0,noiseP); - (*fN)[i] += gRandom->Gaus(0,noiseN); - } + Int_t k,ix; + Double_t signal,noise; + Double_t noiseP[2] = {0.,0.}; + Float_t a,b; + + fResponse->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) } - -//_________________________________________________________________________ - -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 signalLeft=0, signalRight=0,signal=0; + + 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); + } // loop over strips +} +//______________________________________________________________________ +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 * 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 } +//______________________________________________________________________ +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); -void AliITSsimulationSSD::ApplyThreshold() { - // Applies the effect of a threshold on the signals for digitization. - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); + if (numOfSteps < 1) numOfSteps = 1; // one step, at least - // or introduce the SetThresholds in fResponse + // we could condition the stepping depending on the incident angle + // of the track + dex = x/numOfSteps; + dey = y/numOfSteps; + dez = z/numOfSteps; - Int_t i; - for(i=0; i noiseP*4) ? (*fP)[i] : 0; - (*fN)[i] = ((*fN)[i] > noiseN*4) ? (*fN)[i] : 0; - } - + return numOfSteps; } - -//__________________________________________________________________________ - -void AliITSsimulationSSD::ApplyDAQ() { - // Converts simulated signals to simulated ADC counts - AliITS *its=(AliITS*)gAlice->GetModule("ITS"); - - Float_t noiseP, noiseN; - fResponse->GetNoiseParam(noiseP,noiseN); - - char opt[30],dummy[20]; - fResponse->ParamOptions(opt,dummy); - - Int_t i,j; - if (strstr(opt,"SetInvalid")) { - // 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]=0; - for(i=0; iGetNTracks(); j++) { - if(j>2) continue; - if((fTracksP+i)->GetNTracks()) tracks[j]=(fTracksP+i)->GetTrack(j); - else tracks[j]=-2; - charges[j] = 0; - hits[j] = -1; - } - its->AddSimDigit(2,phys,digits,tracks,hits,charges); - - } - - - for(i=0; iGetNTracks(); j++) { - if(j>2) continue; - if((fTracksN+i)->GetNTracks()) tracks[j]=(fTracksN+i)->GetTrack(j); - else tracks[j]=-2; - charges[j] = 0; - hits[j] = -1; - } - its->AddSimDigit(2,phys,digits,tracks,hits,charges); - - } - +//---------------------------------------------------------------------- +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(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; + 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;j1GetNEnteries()){ + // 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 + return; +} +//______________________________________________________________________ +void AliITSsimulationSSD::FillMapFrompList(AliITSpList *pList){ + // 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; +} +//______________________________________________________________________ +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::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); - return 0.5*TMath::Erf(x * fPitch / s) ; -} + source.Print(&os); + return os; +} +//______________________________________________________________________ +istream &operator>>(istream &os,AliITSsimulationSSD &source){ + // Standard output streaming function. + source.Read(&os); + return os; +} //______________________________________________________________________ -Float_t AliITSsimulationSSD::Get2Strip(Int_t flag, Int_t iStrip, Float_t x, Float_t z){ - // Returns the relative space between two strips. - // flag==1 for Pside, 0 for Nside - 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; -} -//____________________________________________________________________________