/* questions to experts: why RemoveDeadPixels should be called before FrompListToDigits ? */ /************************************************************************** * 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. * **************************************************************************/ #include #include #include #include #include "AliITSU.h" #include "AliITSUDigitPix.h" #include "AliITSUHit.h" #include "AliITSUModule.h" #include "AliITSUSensMap.h" #include "AliITSUCalibrationPix.h" #include "AliITSUSegmentationPix.h" #include "AliITSUSimulationPix.h" #include "AliLog.h" #include "AliRun.h" #include "AliMagF.h" #include "AliMathBase.h" #include "AliITSUSimuParam.h" #include "AliITSUSDigit.h" #include "AliITSUParamList.h" using std::cout; using std::endl; using namespace TMath; ClassImp(AliITSUSimulationPix) //////////////////////////////////////////////////////////////////////// // Version: 1 // Modified by D. Elia, G.E. Bruno, H. Tydesjo // Fast diffusion code by Bjorn S. Nilsen // March-April 2006 // October 2007: GetCalibrationObjects() removed // // Version: 0 // Written by Boris Batyunya // December 20 1999 // // Adapted for pixels of ITS upgrade July 2012, ruben.shahoyan@cern.ch // // AliITSUSimulationPix is to do the simulation of pixels // // 2013 Feb: Added MonoPix response and nois calculation al la MIMOSA32 (levente.molnar@cern.ch) // //////////////////////////////////////////////////////////////////////// //______________________________________________________________________ AliITSUSimulationPix::AliITSUSimulationPix() : fTanLorAng(0) ,fReadOutCycleLength(25e-6) ,fReadOutCycleOffset(0) ,fGlobalChargeScale(1.0) ,fSpread2DHisto(0) ,fSpreadFun(0) ,fROTimeFun(0) { // Default constructor. SetUniqueID(AliITSUGeomTGeo::kDetTypePix); } //______________________________________________________________________ AliITSUSimulationPix::AliITSUSimulationPix(AliITSUSimuParam* sim,AliITSUSensMap* map) :AliITSUSimulation(sim,map) ,fTanLorAng(0) ,fReadOutCycleLength(25e-6) ,fReadOutCycleOffset(0) ,fGlobalChargeScale(1.0) ,fSpread2DHisto(0) ,fSpreadFun(0) ,fROTimeFun(0) { // standard constructor SetUniqueID(AliITSUGeomTGeo::kDetTypePix); Init(); } //______________________________________________________________________ AliITSUSimulationPix::AliITSUSimulationPix(const AliITSUSimulationPix &s) :AliITSUSimulation(s) ,fTanLorAng(s.fTanLorAng) ,fReadOutCycleLength(s.fReadOutCycleLength) ,fReadOutCycleOffset(s.fReadOutCycleOffset) ,fGlobalChargeScale(s.fGlobalChargeScale) ,fSpread2DHisto(s.fSpread2DHisto) ,fSpreadFun(s.fSpreadFun) ,fROTimeFun(s.fROTimeFun) { // Copy Constructor } //______________________________________________________________________ AliITSUSimulationPix::~AliITSUSimulationPix() { // destructor // only the sens map is owned and it is deleted by ~AliITSUSimulation } //______________________________________________________________________ AliITSUSimulationPix& AliITSUSimulationPix::operator=(const AliITSUSimulationPix &s) { // Assignment operator if (&s == this) return *this; AliITSUSimulation::operator=(s); fReadOutCycleLength = s.fReadOutCycleLength; fReadOutCycleOffset = s.fReadOutCycleOffset; fSpread2DHisto = s.fSpread2DHisto; fGlobalChargeScale = s.fGlobalChargeScale; fSpreadFun = s.fSpreadFun; fROTimeFun = s.fROTimeFun; // return *this; } //______________________________________________________________________ void AliITSUSimulationPix::Init() { // Initilization if (fSimuParam->GetPixLorentzDrift()) SetTanLorAngle(fSimuParam->GetPixLorentzHoleWeight()); } //______________________________________________________________________ Bool_t AliITSUSimulationPix::SetTanLorAngle(Double_t weightHole) { // This function set the Tangent of the Lorentz angle. // A weighted average is used for electrons and holes // Input: Double_t weightHole: wheight for hole: it should be in the range [0,1] // output: Bool_t : kTRUE in case of success // if (weightHole<0) { weightHole=0.; AliWarning("You have asked for negative Hole weight"); AliWarning("I'm going to use only electrons"); } if (weightHole>1) { weightHole=1.; AliWarning("You have asked for weight > 1"); AliWarning("I'm going to use only holes"); } Double_t weightEle=1.-weightHole; AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); if (!fld) AliFatal("The field is not initialized"); Double_t bz = fld->SolenoidField(); fTanLorAng = Tan(weightHole*fSimuParam->LorentzAngleHole(bz) + weightEle*fSimuParam->LorentzAngleElectron(bz)); return kTRUE; } //_____________________________________________________________________ void AliITSUSimulationPix::SDigitiseModule() { // This function begins the work of creating S-Digits. AliDebug(10,Form("In event %d module %d there are %d hits", fEvent, fModule->GetIndex(),fModule->GetNHits())); // if (fModule->GetNHits()) Hits2SDigitsFast(); // if (fSimuParam->GetPixAddNoisyFlag()) AddNoisyPixels(); if (fSimuParam->GetPixRemoveDeadFlag()) RemoveDeadPixels(); if (!fSensMap->GetEntries()) return; WriteSDigits(); ClearMap(); // } //______________________________________________________________________ void AliITSUSimulationPix::WriteSDigits() { // This function adds each S-Digit to pList static AliITSU *aliITS = (AliITSU*)gAlice->GetModule("ITS"); int nsd = fSensMap->GetEntries(); for (int i=0;iAt(i); // ordered in index if (!sd->GetSumSignal()>0 || fSensMap->IsDisabled(sd)) continue; aliITS->AddSumDigit(*sd); } return; } //______________________________________________________________________ void AliITSUSimulationPix::FinishSDigitiseModule() { // This function calls SDigitsToDigits which creates Digits from SDigits FrompListToDigits(); ClearMap(); return; } //______________________________________________________________________ void AliITSUSimulationPix::DigitiseModule() { // This function creates Digits straight from the hits and then adds // electronic noise to the digits before adding them to pList // Each of the input variables is passed along to Hits2SDigits // // pick charge spread function Hits2SDigitsFast(); // if (fSimuParam->GetPixAddNoisyFlag()) AddNoisyPixels(); if (fSimuParam->GetPixRemoveDeadFlag()) RemoveDeadPixels(); FrompListToDigits(); ClearMap(); } //______________________________________________________________________ void AliITSUSimulationPix::Hits2SDigits() { // Does the charge distributions using Gaussian diffusion charge charing. Int_t nhits = fModule->GetNHits(); if (!nhits) return; // Int_t h,ix,iz,i; Int_t idtrack; Float_t x,y,z; // keep coordinates float (required by AliSegmentation) Double_t tof,x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0,de=0.0; Double_t t,tp,st,dt=0.2,el; Double_t thick = 0.5*fSeg->Dy(); // Half Thickness // for (h=0;hLineSegmentL(h,x0,x1,y0,y1,z0,z1,de,tof,idtrack)) continue; st = Sqrt(x1*x1+y1*y1+z1*z1); if (st>0.0) { st = (Double_t)((Int_t)(st*1e4)); // number of microns if (st<=1.0) st = 1.0; dt = 1.0/st; // RS TODO: do we need 1 micron steps? double dy = dt*thick; y = -0.5*dy; for (t=0.0;t<1.0;t+=dt) { // Integrate over t tp = t+0.5*dt; x = x0+x1*tp; y += dy; z = z0+z1*tp; if (!(fSeg->LocalToDet(x,z,ix,iz))) continue; // outside el = dt * de / fSimuParam->GetGeVToCharge(); // if (fSimuParam->GetPixLorentzDrift()) x += y*fTanLorAng; SpreadCharge2D(x,z,y,ix,iz,el,tof,idtrack,h); } // end for t } else { // st == 0.0 deposit it at this point x = x0; y = y0 + 0.5*thick; z = z0; if (!(fSeg->LocalToDet(x,z,ix,iz))) continue; // outside el = de / fSimuParam->GetGeVToCharge(); if (fSimuParam->GetPixLorentzDrift()) x += y*fTanLorAng; SpreadCharge2D(x,z,y,ix,iz,el,tof,idtrack,h); } // end if st>0.0 } // Loop over all hits h // // Coupling int nd = fSensMap->GetEntriesUnsorted(); // use unsorted access when possible, since it is faster AliITSUSDigit* dg = 0; switch (fSimuParam->GetPixCouplingOption()) { case AliITSUSimuParam::kNewCouplingPix : for (i=nd;i--;) { dg = (AliITSUSDigit*)fSensMap->AtUnsorted(i); if (fSensMap->IsDisabled(dg)) continue; SetCoupling(dg,idtrack,h); } break; case AliITSUSimuParam::kOldCouplingPix: for (i=nd;i--;) { dg = (AliITSUSDigit*)fSensMap->AtUnsorted(i); if (fSensMap->IsDisabled(dg)) continue; SetCouplingOld(dg,idtrack,h); } break; default: break; } // end switch if (GetDebug(2)) AliInfo(Form("Finished fCoupling=%d",fSimuParam->GetPixCouplingOption())); } //______________________________________________________________________ void AliITSUSimulationPix::Hits2SDigitsFast() { // Does the charge distributions using Gaussian diffusion charge charing. // Inputs: // AliITSUModule *mod Pointer to this module // TObjArray *hits = fModule->GetHits(); Int_t nhits = hits->GetEntriesFast(); if (nhits<=0) return; // Int_t h,ix,iz,i; Int_t idtrack; Float_t x,y,z; // keep coordinates float (required by AliSegmentation) Double_t tof,x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0; Double_t step,st,el,de=0.0; Double_t minDim = Min(fSeg->Dpx(1),fSeg->Dpz(1)); // RStmp: smallest pitch Double_t thick = fSeg->Dy(); // for (h=0;hLineSegmentL(h,x0,x1,y0,y1,z0,z1,de,tof,idtrack)) continue; // st = Sqrt(x1*x1+y1*y1+z1*z1); if (st>0.0) { int np = int(1.5*st/minDim); //RStmp: inject the points in such a way that there is ~1.5 point per cell np = TMath::Max(1.0*np,fResponseParam->GetParameter(kSpreadFunMinSteps)); AliDebug(10,Form(" Number of charge injection steps is set to %d ",np)); double dstep = 1./np; double dy = dstep*thick; y = -0.5*dy; step = -0.5*dstep; for (i=0;iLocalToDet(x,z,ix,iz))) continue; // outside el = fGlobalChargeScale * dstep * de/fSimuParam->GetGeVToCharge(); if (fSimuParam->GetPixLorentzDrift()) x += y*fTanLorAng; SpreadCharge2D(x,z,y,ix,iz,el,tof,idtrack,h); } // end for i // End Integrate over t } else { // st == 0.0 deposit it at this point x = x0; y = y0+0.5*thick; z = z0; if (!(fSeg->LocalToDet(x,z,ix,iz))) continue; // outside el = de / fSimuParam->GetGeVToCharge(); if (fSimuParam->GetPixLorentzDrift()) x += y*fTanLorAng; SpreadCharge2D(x,z,y,ix,iz,el,tof,idtrack,h); } // end if st>0.0 } // Loop over all hits h // Coupling int nd = fSensMap->GetEntriesUnsorted(); // use unsorted access when possible, since it is faster AliITSUSDigit* dg = 0; switch (fSimuParam->GetPixCouplingOption()) { case AliITSUSimuParam::kNewCouplingPix : for (i=nd;i--;) { dg = (AliITSUSDigit*)fSensMap->AtUnsorted(i); if (fSensMap->IsDisabled(dg)) continue; SetCoupling(dg,idtrack,h); } case AliITSUSimuParam::kOldCouplingPix: for (i=nd;i--;) { dg = (AliITSUSDigit*)fSensMap->AtUnsorted(i); if (fSensMap->IsDisabled(dg)) continue; SetCouplingOld(dg,idtrack,h); } break; default: break; } // end switch if (GetDebug(2)) AliInfo(Form("Finished fCoupling=%d",fSimuParam->GetPixCouplingOption())); } //______________________________________________________________________ void AliITSUSimulationPix::SpreadCharge2D(Double_t x0,Double_t z0, Double_t dy, Int_t ix0,Int_t iz0, Double_t el, Double_t tof, Int_t tID, Int_t hID) { // Spreads the charge over neighboring cells. Assume charge is distributed // as charge(x,z) = (el/2*pi*sigx*sigz)*exp(-arg) // arg=((x-x0)*(x-x0)/2*sigx*sigx)+((z-z0*z-z0)/2*sigz*sigz) // Defined this way, the integral over all x and z is el. // Inputs: // Double_t x0 x position of point where charge is liberated (local) // Double_t z0 z position of point where charge is liberated (local) // Double_t dy distance from the entrance surface (diffusion sigma may depend on it) // Int_t ix0 row of cell corresponding to point x0 // Int_t iz0 columb of cell corresponding to point z0 // Double_t el number of electrons liberated in this step // Double_t sigx Sigma difusion along x for this step (y0 dependent) // Double_t sigz Sigma difusion along z for this step (z0 dependent) // Int_t tID track number // Int_t hID hit "hit" index number // Int_t ix,iz,ixs,ixe,izs,ize; Float_t x,z; // keep coordinates float (required by AliSegmentation) Float_t xdioshift = 0 , zdioshift = 0 ; Double_t s,dtIn[kNDtSpread]; // data transfered to spread function for integral calculation // if (GetDebug(2)) AliInfo(Form("(x0=%e,z0=%e,dy=%e, ix0=%d,iz0=%d,el=%e,tID=%d,hID=%d)",x0,z0,dy,ix0,iz0,el,tID,hID)); // Double_t &x1 = dtIn[kCellX1]; Double_t &x2 = dtIn[kCellX2]; Double_t &z1 = dtIn[kCellZ1]; Double_t &z2 = dtIn[kCellZ2]; // int nx = GetResponseParam()->GetParameter(kSpreadFunParamNXoffs); int nz = GetResponseParam()->GetParameter(kSpreadFunParamNZoffs); // dtIn[kCellYDepth] = dy; ixs = Max(-nx+ix0,0); ixe = Min( nx+ix0,fSeg->Npx()-1); izs = Max(-nz+iz0,0); ize = Min( nz+iz0,fSeg->Npz()-1); for (ix=ixs;ix<=ixe;ix++) for (iz=izs;iz<=ize;iz++) { // // Check if the hit is inside readout window int cycleRO = (((AliITSUSimulationPix*)this)->*AliITSUSimulationPix::fROTimeFun)(ix,iz,tof); if (Abs(cycleRO)>kMaxROCycleAccept) continue; // fSeg->DetToLocal(ix,iz,x,z); // pixel center xdioshift = zdioshift = 0; CalcDiodeShiftInPixel(ix,iz,xdioshift,zdioshift); // Check and apply diode shift if needed double dxi = 0.5*fSeg->Dpx(ix); double dzi = 0.5*fSeg->Dpz(iz); x1 = (x + xdioshift) - x0; // calculate distance of cell boundaries from injection center z1 = (z + zdioshift) - z0; x2 = x1 + dxi; // Upper x1 -= dxi; // Lower z2 = z1 + dzi; // Upper z1 -= dzi; // Lower s = el* (((AliITSUSimulationPix*)this)->*AliITSUSimulationPix::fSpreadFun)(dtIn); if (s>fSimuParam->GetPixMinElToAdd()) UpdateMapSignal(iz,ix,tID,hID,s,cycleRO); } // end for ix, iz // } //______________________________________________________________________ Double_t AliITSUSimulationPix::SpreadFunDoubleGauss2D(const Double_t *dtIn) { // calculate integral of charge in the cell with boundaries at X=dtIn[kCellX1]:dtIn[kCellX2] // and Z=dtIn[kCellZ1]:dtIn[kCellZ2] // The spread function is assumed to be double gaussian in 2D // Parameters should be: mean0,sigma0, mean1,sigma1, relative strenght of 2nd gaussian wrt 1st one // // 1st gaussian double intg1 = GausInt2D(fResponseParam->GetParameter(kG2SigX0), // sigX dtIn[kCellX1]-fResponseParam->GetParameter(kG2MeanX0), // x1-xmean dtIn[kCellX2]-fResponseParam->GetParameter(kG2MeanX0), // x2-xmean fResponseParam->GetParameter(kG2SigZ0), // sigZ dtIn[kCellZ1]-fResponseParam->GetParameter(kG2MeanZ0), // z1-zmean dtIn[kCellZ2]-fResponseParam->GetParameter(kG2MeanZ0)); // z2-zmean // 2nd gaussian double intg2 = GausInt2D(fResponseParam->GetParameter(kG2SigX1), // sigX dtIn[kCellX1]-fResponseParam->GetParameter(kG2MeanX1), // x1-xmean dtIn[kCellX2]-fResponseParam->GetParameter(kG2MeanX1), // x2-xmean fResponseParam->GetParameter(kG2SigZ1), // sigZ dtIn[kCellZ1]-fResponseParam->GetParameter(kG2MeanZ1), // z1-zmean dtIn[kCellZ2]-fResponseParam->GetParameter(kG2MeanZ1)); // z2-zmean double scl = fResponseParam->GetParameter(kG2ScaleG2); return (intg1+intg2*scl)/(1+scl); // } //______________________________________________________________________ Double_t AliITSUSimulationPix::SpreadFrom2DHisto(const Double_t *dtIn) { // calculate integral of charge in the cell with boundaries at X=dtIn[kCellX1]:dtIn[kCellX2] // and Z=dtIn[kCellZ1]:dtIn[kCellZ2] // The spread function integral is taken from fSpread2DHisto extracted from the sensor response parameters // list in the method SetResponseParam. The histo must return the fraction of charge integrates in the // cell whose center is on the distance X=(dtIn[kCellX1]+dtIn[kCellX2])/2 and Z=(dtIn[kCellZ1]+dtIn[kCellZ2])/2 // from the injection point. // Double_t qpixfrac = 0; Double_t xintp = 1e4*(dtIn[kCellX1]+dtIn[kCellX2])/2.0; Double_t zintp = 1e4*(dtIn[kCellZ1]+dtIn[kCellZ2])/2.0; // qpixfrac = fSpread2DHisto->Interpolate(xintp,zintp); //the PSF map is given in um but the dtIn is in cm so we need to convert it // return qpixfrac; } //______________________________________________________________________ Double_t AliITSUSimulationPix::SpreadFunGauss2D(const Double_t *dtIn) { // calculate integral of charge in the cell with boundaries at X=dtIn[kCellX1]:dtIn[kCellX2] // and Z=dtIn[kCellZ1]:dtIn[kCellZ2] // The spread function is assumed to be gaussian in 2D // Parameters should be: mean0,sigma0 return GausInt2D(fResponseParam->GetParameter(kG1SigX), // sigX fResponseParam->GetParameter(kG1SigZ), // sigZ dtIn[kCellX1]-fResponseParam->GetParameter(kG1MeanX), // x1-xmean dtIn[kCellX2]-fResponseParam->GetParameter(kG1MeanX), // x2-xmean dtIn[kCellZ1]-fResponseParam->GetParameter(kG1MeanZ), // z1-zmean dtIn[kCellZ2]-fResponseParam->GetParameter(kG1MeanZ)); // z2-zmean // } //______________________________________________________________________ void AliITSUSimulationPix::RemoveDeadPixels() { // Removes dead pixels on each module (ladder) // This should be called before going from sdigits to digits (FrompListToDigits) AliITSUCalibrationPix* calObj = (AliITSUCalibrationPix*) GetCalibDead(); if (!calObj) return; // if (calObj->IsBad()) {ClearMap(); return;} // whole module is masked // // remove single bad pixels one by one int nsingle = calObj->GetNrBadSingle(); UInt_t col,row,cycle; for (int i=nsingle;i--;) { calObj->GetBadPixelSingle(i,row,col); fSensMap->DeleteItem(col,row); } int nsd = fSensMap->GetEntriesUnsorted(); for (int isd=nsd;isd--;) { AliITSUSDigit* sd = (AliITSUSDigit*)fSensMap->AtUnsorted(isd); if (fSensMap->IsDisabled(sd)) continue; fSensMap->GetMapIndex(sd->GetUniqueID(),col,row,cycle); int chip = fSeg->GetChipFromChannel(0,col); // if (calObj->IsChipMarkedBad(chip)) fSensMap->Disable(sd); // this will simple mark the hit as bad if (calObj->IsChipMarkedBad(chip)) fSensMap->DeleteItem(sd); // this will suppress hit in the sorted list } // } //______________________________________________________________________ void AliITSUSimulationPix::AddNoisyPixels() { // Adds noisy pixels on each module (ladder) // This should be called before going from sdigits to digits (FrompListToDigits) AliITSUCalibrationPix* calObj = (AliITSUCalibrationPix*) GetCalibNoisy(); if (!calObj) { AliDebug(10,Form(" No Calib Object for Noise!!! ")); return;} for (Int_t i=calObj->GetNrBad(); i--;) UpdateMapNoise(calObj->GetBadColAt(i), calObj->GetBadRowAt(i), 10*fSimuParam->GetPixThreshold(fModule->GetIndex())); // } //______________________________________________________________________ void AliITSUSimulationPix::FrompListToDigits() { // add noise and electronics, perform the zero suppression and add the // digit to the list static AliITSU *aliITS = (AliITSU*)gAlice->GetModule("ITS"); UInt_t ix,iz,iCycle; Double_t sig; const Int_t knmaxtrk=AliITSdigit::GetNTracks(); static AliITSUDigitPix dig; // RS: in principle: // 1) for every pixel w/o hit we have to generate a noise and activate the pixel if the noise exceeds the threshold. // 2) for every pixel with hit we should add random noise and check if the total signal exceeds the threshold // With many channels this will be too time consuming, hence I do the following // 1) Precalculate the probability that the nois alone will exceed the threshold (probnoisy). // 2) Chose randomly empty pixels according to fakes rate // 3) For pixels having a hits apply the usual noise and compare with threshold // // RS may use for ordered random sample generation dl.acm.org/ft_gateway.cfm?id=356313&type=pdf // int maxInd = fSensMap->GetMaxIndex(); int modId = fModule->GetIndex(); // int nsd = fSensMap->GetEntries(); Int_t prevID=0,curID=0; TArrayI ordSampleInd(100),ordSample(100); // double probNoisy,noiseSig,noiseMean,thresh = fSimuParam->GetPixThreshold(modId); fSimuParam->GetPixNoise(modId, noiseSig, noiseMean); probNoisy = AliITSUSimuParam::CalcProbNoiseOverThreshold(noiseMean,noiseSig,thresh); // prob. to have noise above threshold // for (int i=0;iAt(i); // ordered in index if (fSensMap->IsDisabled(sd)) continue; curID = (int)sd->GetUniqueID(); // if ( fSimuParam->GetPixAddNoisyFlag() ) { CreateNoisyDigits(prevID,curID,probNoisy, noiseSig, noiseMean); prevID = curID+1; // // add noise also to sdigit with signal sd->AddNoise(AliITSUSimuParam::GenerateNoiseQFunction(0,noiseMean,noiseSig)); } // if ((sig=sd->GetSumSignal())<=fSimuParam->GetPixThreshold(modId)) continue; if (Abs(sig)>2147483647.0) { //RS? //PH 2147483647 is the max. integer //PH This apparently is a problem which needs investigation AliWarning(Form("Too big or too small signal value %f",sig)); } fSensMap->GetMapIndex(sd->GetUniqueID(),iz,ix,iCycle); dig.SetCoord1(iz); dig.SetCoord2(ix); dig.SetROCycle(int(iCycle) - kMaxROCycleAccept); dig.SetSignal((Int_t)sig); dig.SetSignalPix((Int_t)sig); int ntr = sd->GetNTracks(); for (int j=0;jGetTrack(j)); dig.SetHit(j,sd->GetHit(j)); } for (int j=ntr;jAddSimDigit(AliITSUGeomTGeo::kDetTypePix, &dig); } // if needed, add noisy pixels with id from last real hit to maxID if (fSimuParam->GetPixAddNoisyFlag() && (nsd>0 || ( nsd==0 && fSimuParam->GetPixNoiseInAllMod()) )) { AliDebug(10,Form("CreateNoisyDigits2( %d ,%d) module %d",prevID,maxInd,modId)); CreateNoisyDigits(prevID,maxInd,probNoisy, noiseSig, noiseMean); } // } //______________________________________________________________________ Int_t AliITSUSimulationPix::CreateNoisyDigits(Int_t minID,Int_t maxID,double probNoisy, double noise, double base) { // create random noisy digits above threshold within id range [minID,maxID[ // see FrompListToDigits for details // static AliITSU *aliITS = (AliITSU*)gAlice->GetModule("ITS"); UInt_t ix,iz,iCycle; static AliITSUDigitPix dig; static TArrayI ordSampleInd(100),ordSample(100); //RS!!! static is not thread-safe!!! const Int_t knmaxtrk=AliITSdigit::GetNTracks(); // Int_t ncand = 0; int npix = maxID-minID; if (npix<1 || (ncand=gRandom->Poisson(npix * fSimuParam->GetPixFakeRate() ))<1) return ncand; // decide how many noisy pixels will be added ncand = GenOrderedSample(npix,ncand,ordSample,ordSampleInd); int* ordV = ordSample.GetArray(); int* ordI = ordSampleInd.GetArray(); for (int j=0;jGetMapIndex((UInt_t)ordV[ordI[j]],iz,ix,iCycle); // create noisy digit dig.SetCoord1(iz); dig.SetCoord2(ix); dig.SetROCycle(int(iCycle) - kMaxROCycleAccept); dig.SetSignal(1); dig.SetSignalPix((Int_t)AliITSUSimuParam::GenerateNoiseQFunction(probNoisy,base,noise)); for (int k=knmaxtrk;k--;) { dig.SetTrack(k,-3); dig.SetHit(k,-1); } aliITS->AddSimDigit(AliITSUGeomTGeo::kDetTypePix,&dig); AliDebug(10,Form("Add noisy pixel %d(%d/%d) Noise=%d",ordV[ordI[j]],iz,ix,dig.GetSignalPix())); } return ncand; } //______________________________________________________________________ void AliITSUSimulationPix::SetCoupling(AliITSUSDigit* old, Int_t ntrack, Int_t idhit) { // Take into account the coupling between adiacent pixels. // The parameters probcol and probrow are the probability of the // signal in one pixel shared in the two adjacent pixels along // the column and row direction, respectively. // Note pList is goten via GetMap() and module is not need any more. // Otherwise it is identical to that coded by Tiziano Virgili (BSN). //Begin_Html /*
. 
   */
   //End_Html
   // Inputs:
  // old                  existing AliITSUSDigit
  // Int_t ntrack         track incex number
  // Int_t idhit          hit index number
  UInt_t col,row,iCycle;
  Double_t pulse1,pulse2;
  Double_t couplR=0.0,couplC=0.0;
  Double_t xr=0.;
  //
  fSensMap->GetMapIndex(old->GetUniqueID(),col,row,iCycle);
  int cycle = int(iCycle)-kMaxROCycleAccept;
  fSimuParam->GetPixCouplingParam(couplC,couplR);
  if (GetDebug(2)) AliInfo(Form("(col=%d,row=%d,ntrack=%d,idhit=%d)  couplC=%e couplR=%e",
				col,row,ntrack,idhit,couplC,couplR));
  pulse2 = pulse1 = old->GetSignal();
  if (pulse1GetPixMinElToAdd()) return; // too small signal
  for (Int_t isign=-1;isign<=1;isign+=2) {
    //
    // loop in col direction
    int j1 = int(col) + isign;
    xr = gRandom->Rndm();
    if ( !((j1<0) || (j1>fSeg->Npz()-1) || (xr>couplC)) ) UpdateMapSignal(UInt_t(j1),row,ntrack,idhit,pulse1,cycle);
    //
    // loop in row direction
    int j2 = int(row) + isign;
    xr = gRandom->Rndm();
    if ( !((j2<0) || (j2>fSeg->Npx()-1) || (xr>couplR)) ) UpdateMapSignal(col,UInt_t(j2),ntrack,idhit,pulse2,cycle);
  } 
  //
}

//______________________________________________________________________
void AliITSUSimulationPix::SetCouplingOld(AliITSUSDigit* old, Int_t ntrack,Int_t idhit) 
{
  //  Take into account the coupling between adiacent pixels.
  //  The parameters probcol and probrow are the fractions of the
  //  signal in one pixel shared in the two adjacent pixels along
  //  the column and row direction, respectively.
  //Begin_Html
  /*

. 
  */
  //End_Html
  // Inputs:
  // old            existing AliITSUSDigit
  // ntrack         track incex number
  // idhit          hit index number
  // module         module number
  //
  UInt_t col,row,iCycle;
  Int_t modId = fModule->GetIndex();
  Double_t pulse1,pulse2;
  Double_t couplR=0.0,couplC=0.0;
  //
  fSensMap->GetMapIndex(old->GetUniqueID(),col,row,iCycle);
  int cycle = int(iCycle)-kMaxROCycleAccept;  
  fSimuParam->GetPixCouplingParam(couplC,couplR);
  if (GetDebug(3)) AliInfo(Form("(col=%d,row=%d,roCycle=%d,ntrack=%d,idhit=%d)  couplC=%e couplR=%e",
				col,row,iCycle,ntrack,idhit,couplC,couplR));
 //
 if (old->GetSignal()GetPixMinElToAdd()) return; // too small signal
 for (Int_t isign=-1;isign<=1;isign+=2) {// loop in col direction
   pulse2 = pulse1 = old->GetSignal();
   //
   int j1 = int(col)+isign;
   pulse1 *= couplC;    
   if ((j1<0)||(j1>fSeg->Npz()-1)||(pulse1GetPixThreshold(modId))) pulse1 = old->GetSignal();
   else UpdateMapSignal(UInt_t(j1),row,ntrack,idhit,pulse1,cycle);
   
   // loop in row direction
   int j2 = int(row) + isign;
   pulse2 *= couplR;
   if ((j2<0)||(j2>(fSeg->Npx()-1))||(pulse2GetPixThreshold(modId))) pulse2 = old->GetSignal();
   else UpdateMapSignal(col,UInt_t(j2),ntrack,idhit,pulse2,cycle);
 } // for isign
}

//______________________________________________________________________
void AliITSUSimulationPix::GenerateReadOutCycleOffset()
{
  // Generate randomly the strobe
  // phase w.r.t to the LHC clock
  fReadOutCycleOffset = fReadOutCycleLength*gRandom->Rndm();
  // fReadOutCycleOffset = 25e-9*gRandom->Rndm(); // clm: I think this way we shift too much 10-30 us! The global shift should be between the BCs?!
  // RS: 25 ns is too small number, the staggering will not work. Let's at the moment keep fully random shift (still, no particle from correct
  // collision will be lost) untill real number is specified
 //
}

//______________________________________________________________________
void AliITSUSimulationPix::SetResponseParam(AliITSUParamList* resp)
{
  // attach response parameterisation data
  fResponseParam = resp;
  //
  int spreadID = Nint(fResponseParam->GetParameter(AliITSUSimulationPix::kChargeSpreadType));
  const char* hname = 0;
  fSpread2DHisto = 0;
  //
  switch (spreadID) {
    //
  case kSpreadFunHisto: 
    fSpreadFun = &AliITSUSimulationPix::SpreadFrom2DHisto;
    hname = fResponseParam->GetParName(AliITSUSimulationPix::kChargeSpreadType);
    if (!(fSpread2DHisto=(TH2*)fResponseParam->GetParamObject(hname))) 
      AliFatal(Form("Did not find 2D histo %s for charge spread parameterization",hname));
    break;
    //
  case kSpreadFunDoubleGauss2D: 
    fSpreadFun = &AliITSUSimulationPix::SpreadFunDoubleGauss2D; 
    break;
    //
  case kSpreadFunGauss2D: 
    fSpreadFun = &AliITSUSimulationPix::SpreadFunGauss2D;       
    break;
    //
  default: AliFatal(Form("Did not find requested spread function id=%d",spreadID));
  }
  //
  int readoutType = Nint(fResponseParam->GetParameter(kReadOutSchemeType));
  switch (readoutType) {
  case kReadOutStrobe: 
    fROTimeFun = &AliITSUSimulationPix::GetReadOutCycle;
    break;
  case kReadOutRollingShutter: 
    fROTimeFun = &AliITSUSimulationPix::GetReadOutCycleRollingShutter;
    break;
  default: AliFatal(Form("Did not find requested readout time type id=%d",readoutType));
  }
  //___ Set the Rolling Shutter read-out window 
  fReadOutCycleLength = fResponseParam->GetParameter(kReadOutCycleLength);
  //___ Pixel discrimination threshold, and the S/N cut
  fSimuParam->SetPixThreshold(fResponseParam->GetParameter(kPixNoiseMPV) *fResponseParam->GetParameter(kPixSNDisrcCut) , fResponseParam->GetParameter(kPixSNDisrcCut),-1); //for all modules
  //___ Minimum number of electrons to add 
  fSimuParam->SetPixMinElToAdd(fResponseParam->GetParameter(kPixMinElToAdd));
  //___ Set the Pixel Noise MPV and Sigma (the noise distribution is Landau not Gauss due to RTN)
  fSimuParam->SetPixNoise( fResponseParam->GetParameter(kPixNoiseMPV), fResponseParam->GetParameter(kPixNoiseSigma), -1); //for all modules
  //___ Pixel fake hit rate
  fSimuParam->SetPixFakeRate( fResponseParam->GetParameter(kPixFakeRate) );
  //___ To apply the noise or not
  if (  fResponseParam->GetParameter(kPixNoiseIsOn) > 0.01)  fSimuParam->SetPixAddNoisyFlag(kTRUE);
  else fSimuParam->SetPixAddNoisyFlag(kFALSE);
  //
  if(fResponseParam->GetParameter(kPixNoiseInAllMod) > 0.01 ) fSimuParam->SetPixNoiseInAllMod(kTRUE);
  else fSimuParam->SetPixNoiseInAllMod(kFALSE);
  //
  //  Double_t vGeVToQ = fSimuParam->GetGeVToCharge();
  fGlobalChargeScale = fResponseParam->GetParameter(kSpreadFunGlobalQScale);
    
  AliDebug(10,Form("=============== Setting the response start ============================"));
  AliDebug(10,Form("=============== RO type: %d",readoutType));
  AliDebug(10,Form("=============== RO cycle lenght: %lf",fReadOutCycleLength));
  AliDebug(10,Form("=============== Noise MPV: %lf",fResponseParam->GetParameter(kPixNoiseMPV)));
  AliDebug(10,Form("=============== Noise Sigma: %lf",fResponseParam->GetParameter(kPixNoiseSigma)));
  AliDebug(10,Form("=============== Fake rate: %lf",fResponseParam->GetParameter(kPixFakeRate)));
  AliDebug(10,Form("=============== Noise On/Off: %d",fSimuParam->GetPixAddNoisyFlag()));
  AliDebug(10,Form("=============== Noise in all mod on/off: %d",fSimuParam->GetPixNoiseInAllMod()));
  AliDebug(10,Form("=============== Global Charge scale: %lf",fGlobalChargeScale));
  AliDebug(10,Form("=============== Setting the response done  ============================"));
  
  
  
}

//______________________________________________________________________
Int_t AliITSUSimulationPix::GetReadOutCycleRollingShutter(Int_t row, Int_t col, Double_t hitTime)
{
  //
  // Get the read-out cycle of the hit in the given column/row of the sensor.
  // hitTime is the time of the subhit (hit is divided to nstep charge deposit) in seconds
  // globalPhaseShift gives the start of the RO for the cycle in pixel wrt the LHC clock
  // GetRollingShutterWindow give the with of the rolling shutter read out window
  //
  double tmin = fReadOutCycleOffset + fReadOutCycleLength*(double(row)/fSeg->Npx()-1.);
  int cycle = Nint( (hitTime-tmin)/fReadOutCycleLength - 0.5 );
  AliDebug(3,Form("Rolling shutter at row%d/col%d: particle time: %e, tmin: %e : tmax %e -> cycle:%d",row,col,hitTime,tmin,
		  tmin+fReadOutCycleLength,cycle));
  return cycle;
  //  
}

//______________________________________________________________________
Int_t AliITSUSimulationPix::GetReadOutCycle(Int_t row, Int_t col, Double_t hitTime)
{
  //
  // Check whether the hit is in the read out window of the given column/row of the sensor
  //
  AliDebug(3,Form("Strobe readout: row%d/col%d: particle time: %e, tmin: %e, tmax %e",
		  row,col,hitTime,fReadOutCycleOffset,fReadOutCycleOffset+fReadOutCycleLength));
  hitTime -= fReadOutCycleOffset+0.5*fReadOutCycleLength;
  return (hitTime<0 || hitTime>fReadOutCycleLength) ? kMaxROCycleAccept+1 : 0;
  //  
}

//_______________________________________________________________________
void AliITSUSimulationPix::CalcDiodeShiftInPixel(Int_t xlin, Int_t zcol, Float_t &x, Float_t &)
{
  //
  // Calculates the shift of the diode wrt the geometric center of the pixel.
  // It is needed for staggerred pixel layout or double diode pixels with assymetric center
  // The shift can depend on the column or line or both...
  // The x and z are passed in cm 
  //
  
  TString parTitle = fResponseParam->GetTitle();
  
  // M32terP31 is staggered the diode shift within pixel depends on the column
  if ( parTitle.Contains("M32terP31") ) 
  {
    if ( zcol%2 == 0 )    x += 0.30 * fSeg->Dpx(xlin);
    else                  x -= 0.19 * fSeg->Dpx(xlin);
  }
  
 
}
//_______________________________________________________________________