+/**************************************************************************
+ * 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. *
+ **************************************************************************/
+
+/*
+$Log$
+Revision 1.13 2001/11/13 11:13:24 barbera
+A protection against tracks with the same entrance and exit has been made more strict
+
+Revision 1.12 2001/10/04 22:44:31 nilsen
+Major changes in supppor of PreDigits (SDigits). Changes made with will make
+it easier to suppor expected changes in AliITSHit class. Added use of new
+class AliITSpList. Both SPD and SDD have added effects of Dead Channels. Both
+of these will require addtional work as data bases of detectors and the like
+are developed.
+
+*/
#include <iostream.h>
#include <TRandom.h>
#include <TH1.h>
+#include <TMath.h>
+#include <TString.h>
+#include <TParticle.h>
#include "AliRun.h"
-#include "AliITSMap.h" // "AliITSMapA2.h"
+#include "AliITS.h"
+#include "AliITShit.h"
+#include "AliITSdigit.h"
+#include "AliITSmodule.h"
+#include "AliITSMapA2.h"
+#include "AliITSpList.h"
#include "AliITSsimulationSPD.h"
#include "AliITSsegmentation.h"
#include "AliITSresponse.h"
+#include "AliITSsegmentationSPD.h"
+#include "AliITSresponseSPD.h"
+
ClassImp(AliITSsimulationSPD)
////////////////////////////////////////////////////////////////////////
// Version: 0
-// Written by Boris Batyunya
-// December 20 1999
+// Written by Rocco Caliandro
+// from a model developed with T. Virgili and R.A. Fini
+// June 15 2000
//
// AliITSsimulationSPD is the simulation of SPDs
//
-//________________________________________________________________________
-
+//______________________________________________________________________
AliITSsimulationSPD::AliITSsimulationSPD(){
- // constructor
- fResponse = 0;
- fSegmentation = 0;
- fHis = 0;
- fNoise = 0.;
- fBaseline = 0.;
+ // Default constructor
+
+ fResponse = 0;
+ fSegmentation = 0;
+ fHis = 0;
+ fMapA2 = 0;
+/*
+ fThresh = 0.;
+ fSigma = 0.;
+ fCouplCol = 0.;
+ fCouplRow = 0.; */
}
-//_____________________________________________________________________________
-
-AliITSsimulationSPD::AliITSsimulationSPD(AliITSsegmentation *seg, AliITSresponse *resp) {
- // constructor
- fResponse = resp;
- fSegmentation = seg;
-
- fResponse->GetNoiseParam(fNoise,fBaseline);
-
-
- fMapA2 = new AliITSMapA2(fSegmentation);
-
- //
- fNPixelsZ=fSegmentation->Npz();
- fNPixelsX=fSegmentation->Npx();
-
+//______________________________________________________________________
+AliITSsimulationSPD::AliITSsimulationSPD(AliITSsegmentation *seg,
+ AliITSresponse *resp) {
+ // Standard constructor
+
+ fResponse = 0;
+ fSegmentation = 0;
+ fHis = 0;
+ fMapA2 = 0;
+/*
+ fThresh = 0.;
+ fSigma = 0.;
+ fCouplCol = 0.;
+ fCouplRow = 0.*/
+ Init((AliITSsegmentationSPD*)seg,(AliITSresponseSPD*)resp);
}
-
-//_____________________________________________________________________________
-
+//______________________________________________________________________
+void AliITSsimulationSPD::Init(AliITSsegmentationSPD *seg,
+ AliITSresponseSPD *resp) {
+ // Initilizes the variables of AliITSsimulation SPD.
+
+ fHis = 0;
+ fResponse = resp;
+ fSegmentation = seg;
+ fMapA2 = new AliITSMapA2(fSegmentation);
+/*
+ fResponse->Thresholds(fThresh,fSigma);
+ fResponse->GetNoiseParam(fCouplCol,fCouplRow);
+ fNPixelsZ = fSegmentation->Npz();
+ fNPixelsX = fSegmentation->Npx();
+*/
+}
+//______________________________________________________________________
AliITSsimulationSPD::~AliITSsimulationSPD() {
- // destructor
+ // destructor
- delete fMapA2;
+ delete fMapA2;
- if (fHis) {
- fHis->Delete();
- delete fHis;
- }
+ if (fHis) {
+ fHis->Delete();
+ delete fHis;
+ } // end if
}
-
-//__________________________________________________________________________
+//______________________________________________________________________
AliITSsimulationSPD::AliITSsimulationSPD(const AliITSsimulationSPD &source){
- // Copy Constructor
- if(&source == this) return;
- this->fMapA2 = source.fMapA2;
- this->fNoise = source.fNoise;
- this->fBaseline = source.fBaseline;
- this->fNPixelsX = source.fNPixelsX;
- this->fNPixelsZ = source.fNPixelsZ;
- this->fHis = source.fHis;
- return;
+ // Copy Constructor
+
+ if(&source == this) return;
+
+ this->fMapA2 = source.fMapA2;
+ this->fHis = source.fHis;
+/*
+ this->fThresh = source.fThresh;
+ this->fSigma = source.fSigma;
+ this->fCouplCol = source.fCouplCol;
+ this->fCouplRow = source.fCouplRow;
+ this->fNPixelsX = source.fNPixelsX;
+ this->fNPixelsZ = source.fNPixelsZ;
+*/
+ return;
}
+//______________________________________________________________________
+AliITSsimulationSPD& AliITSsimulationSPD::operator=(const AliITSsimulationSPD
+ &source) {
+ // Assignment operator
+
+ if(&source == this) return *this;
+
+ this->fMapA2 = source.fMapA2;
+ this->fHis = source.fHis;
+/*
+ this->fThresh = source.fThresh;
+ this->fSigma = source.fSigma;
+ this->fCouplCol = source.fCouplCol;
+ this->fCouplRow = source.fCouplRow;
+ this->fNPixelsX = source.fNPixelsX;
+ this->fNPixelsZ = source.fNPixelsZ;
+*/
+ return *this;
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::SDigitiseModule(AliITSmodule *mod, Int_t dummy0,
+ Int_t dummy1) {
+ // Sum digitize module
+ if (!(mod->GetNhits())) return; // if module has no hits then no Sdigits.
+ Int_t number = 10000;
+ Int_t *frowpixel = new Int_t[number];
+ Int_t *fcolpixel = new Int_t[number];
+ Double_t *fenepixel = new Double_t[number];
-//_________________________________________________________________________
-AliITSsimulationSPD&
- AliITSsimulationSPD::operator=(const AliITSsimulationSPD &source) {
- // Assignment operator
- if(&source == this) return *this;
- this->fMapA2 = source.fMapA2;
- this->fNoise = source.fNoise;
- this->fBaseline = source.fBaseline;
- this->fNPixelsX = source.fNPixelsX;
- this->fNPixelsZ = source.fNPixelsZ;
- this->fHis = source.fHis;
- return *this;
- }
-//_____________________________________________________________________________
-
-void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod, Int_t module, Int_t dummy) {
- // digitize module
- const Float_t kEntoEl = 2.778e+8; // GeV->charge in electrons
- // for 3.6 eV/pair
- const Float_t kconv = 10000.; // cm -> microns
-
- Float_t spdLenght = fSegmentation->Dz();
- Float_t spdWidth = fSegmentation->Dx();
-
- Float_t difCoef = fResponse->DiffCoeff();
-
- Float_t zPix0 = 1e+6;
- Float_t xPix0 = 1e+6;
- Float_t yPix0 = 1e+6;
- Float_t yPrev = 1e+6;
-
- Float_t zPitch = fSegmentation->Dpz(0);
- Float_t xPitch = fSegmentation->Dpx(0);
-
- //cout << "pitch per z: " << zPitch << endl;
- //cout << "pitch per r*phi: " << xPitch << endl;
-
- TObjArray *fHits = mod->GetHits();
- Int_t nhits = fHits->GetEntriesFast();
- if (!nhits) return;
-
-
-
- // Array of pointers to the label-signal list
-
- Int_t maxNdigits = fNPixelsX*fNPixelsZ;
- Float_t **pList = new Float_t* [maxNdigits];
- memset(pList,0,sizeof(Float_t*)*maxNdigits);
- Int_t indexRange[4] = {0,0,0,0};
+ // Array of pointers to store the track index of the digits
+ // leave +1, otherwise pList crashes when col=256, row=192
+ AliITSpList *pList = new AliITSpList(GetNPixelsZ()+1,GetNPixelsX()+1);
- // Fill detector maps with GEANT hits
- // loop over hits in the module
+ HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,pList);
- Int_t layer,idtrack,status,trdown,ndZ,ndX,nsteps,iZi,nZpix,nXpix;
- Int_t jzmin,jzmax,jxmin,jxmax,jx,jz,lz,lx,index;
- Float_t zArg1,zArg2,xArg1,xArg2;
- Float_t zProb1,zProb2,xProb1,xProb2;
- Float_t dZCharge,dXCharge;
- Double_t signal;
- Float_t projDif; // RMS of xDif and zDif
- Float_t dProjn; // RMS of dXn and dZn
- Float_t depEnergy; // The deposited energy from this hit
- Float_t zPix; // hit position in microns
- Float_t xPix; // hit position in microns
- Float_t yPix; // hit position in microns
- Float_t zPixn; // hit position in microns
- Float_t xPixn; // hit position in microns
- Float_t charge,dCharge;// charge in e-
- Float_t drPath;
- Float_t tAng,dZ,dX,dXn,dZn;
- Float_t sigmaDif;
- Float_t dZright,dZleft;
- Float_t dXright,dXleft;
- Float_t dZprev,dZnext,dXprev,dXnext;
-
- static Bool_t first=kTRUE;
- Int_t lasttrack = -2,hit;
- for(hit=0;hit<nhits;hit++) {
- AliITShit *iHit = (AliITShit*) fHits->At(hit);
- layer = iHit->GetLayer();
-
- // work with the idtrack=entry number in the TreeH
- // Int_t idtrack=mod->GetHitTrackIndex(ii);
- // or store straight away the particle position in the array
- // of particles :
- idtrack = iHit->GetTrack();
-
- //if(module==11 || module==157) {
- // Int_t track = iHit->fTrack;
- // Int_t primary = gAlice->GetPrimary(track);
- // Int_t parent = iHit->GetParticle()->GetFirstMother();
- // printf("module,hit,track,primary,parent %d %d %d %d %d \n",
- // md,hit,track,primary,parent);
- //}
-
- // Get hit z and x(r*phi) cordinates for each module (detector)
- // in local system.
-
- zPix = kconv*iHit->GetZL(); // Geant cm to microns
- xPix = kconv*iHit->GetXL(); // Geant cm to micron
- yPix = kconv*iHit->GetYL(); // Geant cm to micron
-
- // Get track status
- status = iHit->GetTrackStatus();
- if(status != 66 && status != 68) {
- printf("!!!!! no order status %d\n",status);
- }
-
- trdown = 0;
-
- // enter Si or after event in Si
- if (status == 66 ) {
- zPix0 = zPix;
- xPix0 = xPix;
- yPrev = yPix;
- }
- // enter Si only
- if (layer == 1 && status == 66 && yPix > 71.) {
- yPix0 = yPix;
- }
- // enter Si only
- if (layer == 2 && status == 66 && yPix < -71.) {
- yPix0 = yPix;
- }
- depEnergy = iHit->GetIonization();
- // skip if the input point to Si
- if(depEnergy <= 0.) continue;
- // if track returns to the opposite direction:
- if (layer == 1 && yPix > yPrev) {
- yPix0 = yPrev;
- trdown = 1;
- }
- if (layer == 2 && yPix < yPrev) {
- yPix0 = yPrev;
- trdown = 1;
- }
-
- // take into account the holes diffusion inside the Silicon
- // the straight line between the entrance and exit points in Si is
- // divided into the several steps; the diffusion is considered
- // for each end point of step and charge
- // is distributed between the pixels through the diffusion.
-
-
- // ---------- the diffusion in Z (beam) direction -------
-
- charge = depEnergy*kEntoEl; // charge in e-
- drPath = 0.;
- tAng = 0.;
- sigmaDif = 0.;
- Float_t zDif = zPix - zPix0;
- Float_t xDif = xPix - xPix0;
- Float_t yDif = yPix - yPix0;
-
- if(TMath::Abs(yDif) < 0.1) continue; // yDif is not zero
-
-
- projDif = sqrt(xDif*xDif + zDif*zDif);
- ndZ = (Int_t)TMath::Abs(zDif/zPitch) + 1;
- ndX = (Int_t)TMath::Abs(xDif/xPitch) + 1;
-
- // number of the steps along the track:
- nsteps = ndZ;
- if(ndX > ndZ) nsteps = ndX;
- if(nsteps < 6) nsteps = 6; // minimum number of the steps
-
- if(TMath::Abs(projDif) > 5.0) tAng = yDif/projDif;
- dCharge = charge/nsteps; // charge in e- for one step
- dZ = zDif/nsteps;
- dX = xDif/nsteps;
-
- if (TMath::Abs(projDif) < 5.0 ) {
- drPath = yDif*1.e-4;
- drPath = TMath::Abs(drPath); // drift path in cm
- sigmaDif = difCoef*sqrt(drPath); // sigma diffusion in cm
- }
-
- for(iZi = 1;iZi <= nsteps;iZi++) {
- dZn = iZi*dZ;
- dXn = iZi*dX;
- zPixn = zPix0 + dZn;
- xPixn = xPix0 + dXn;
-
- if(TMath::Abs(projDif) >= 5.) {
- dProjn = sqrt(dZn*dZn+dXn*dXn);
- if(trdown == 0) {
- drPath = dProjn*tAng*1.e-4; // drift path for iZi step in cm
- drPath = TMath::Abs(drPath);
- }
- if(trdown == 1) {
- dProjn = projDif/nsteps;
- drPath = (projDif-(iZi-1)*dProjn)*tAng*1.e-4;
- drPath = TMath::Abs(drPath);
- }
- sigmaDif = difCoef*sqrt(drPath);
- sigmaDif = sigmaDif*kconv; // sigma diffusion in microns
- }
- zPixn = (zPixn + spdLenght/2.);
- xPixn = (xPixn + spdWidth/2.);
- fSegmentation->GetCellIxz(xPixn,zPixn,nXpix,nZpix);
- zPitch = fSegmentation->Dpz(nZpix);
- // set the window for the integration
- jzmin = 1;
- jzmax = 3;
- if(nZpix == 1) jzmin =2;
- if(nZpix == fNPixelsZ) jzmax = 2;
-
- jxmin = 1;
- jxmax = 3;
- if(nXpix == 1) jxmin =2;
- if(nXpix == fNPixelsX) jxmax = 2;
-
- zPix = nZpix;
- dZright = zPitch*(zPix - zPixn);
- dZleft = zPitch - dZright;
- xPix = nXpix;
- dXright = xPitch*(xPix - xPixn);
- dXleft = xPitch - dXright;
- dZprev = 0.;
- dZnext = 0.;
- dXprev = 0.;
- dXnext = 0.;
-
- for(jz=jzmin; jz <=jzmax; jz++) {
- if(jz == 1) {
- dZprev = -zPitch - dZleft;
- dZnext = -dZleft;
- }
- if(jz == 2) {
- dZprev = -dZleft;
- dZnext = dZright;
- }
- if(jz == 3) {
- dZprev = dZright;
- dZnext = dZright + zPitch;
- }
- // lz changes from 1 to the fNofPixels(270)
- lz = nZpix + jz -2;
-
- zArg1 = dZprev/sigmaDif;
- zArg2 = dZnext/sigmaDif;
- zProb1 = TMath::Erfc(zArg1);
- zProb2 = TMath::Erfc(zArg2);
- dZCharge =0.5*(zProb1-zProb2)*dCharge;
-
- //printf("dZCharge %f \n",dZCharge);
-
- // ----------- holes diffusion in X(r*phi) direction --------
-
- if(dZCharge > 1.) {
- for(jx=jxmin; jx <=jxmax; jx++) {
- if(jx == 1) {
- dXprev = -xPitch - dXleft;
- dXnext = -dXleft;
- }
- if(jx == 2) {
- dXprev = -dXleft;
- dXnext = dXright;
- }
- if(jx == 3) {
- dXprev = dXright;
- dXnext = dXright + xPitch;
- }
- lx = nXpix + jx -2;
-
- xArg1 = dXprev/sigmaDif;
- xArg2 = dXnext/sigmaDif;
- xProb1 = TMath::Erfc(xArg1);
- xProb2 = TMath::Erfc(xArg2);
- dXCharge =0.5*(xProb1-xProb2)*dZCharge;
-
- //printf("dXCharge %f \n",dXCharge);
-
- if(dXCharge > 1.) {
- index = lz-1;
- if (first) {
- indexRange[0]=indexRange[1]=index;
- indexRange[2]=indexRange[3]=lx-1;
- first=kFALSE;
- }
-
- indexRange[0]=TMath::Min(indexRange[0],lz-1);
- indexRange[1]=TMath::Max(indexRange[1],lz-1);
- indexRange[2]=TMath::Min(indexRange[2],lx-1);
- indexRange[3]=TMath::Max(indexRange[3],lx-1);
- // build the list of digits for this module
- signal=fMapA2->GetSignal(index,lx-1);
- signal+=dXCharge;
- fMapA2->SetHit(index,lx-1,(double)signal);
- } // dXCharge > 1 e-
- } // jx loop
- } // dZCharge > 1 e-
- } // jz loop
- } // iZi loop
-
- if (status == 65) { // the step is inside of Si
- zPix0 = zPix;
- xPix0 = xPix;
- }
- yPrev = yPix; //ch
-
- if (lasttrack != idtrack || hit==(nhits-1)) {
- GetList(idtrack,pList,indexRange);
- first=kTRUE;
- }
- lasttrack=idtrack;
- } // hit loop inside the module
-
-
- // introduce the electronics effects and do zero-suppression
- ChargeToSignal(pList);
+ WriteSDigits(pList);
// clean memory
-
+ delete[] frowpixel;
+ delete[] fcolpixel;
+ delete[] fenepixel;
fMapA2->ClearMap();
+ delete pList;
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod, Int_t dummy0,
+ Int_t dummy1) {
+ // digitize module. Also need to digitize modules with only noise.
+ Int_t number = 10000;
+ Int_t *frowpixel = new Int_t[number];
+ Int_t *fcolpixel = new Int_t[number];
+ Double_t *fenepixel = new Double_t[number];
+ Int_t module = mod->GetIndex();
-}
-
-//---------------------------------------------
-void AliITSsimulationSPD::GetList(Int_t label,Float_t **pList,Int_t *indexRange) {
- // loop over nonzero digits
-
- Int_t ix,iz,globalIndex;
- Float_t signal;
- Float_t highest,middle,lowest;
-
- for(iz=indexRange[0];iz<indexRange[1]+1;iz++){
- for(ix=indexRange[2];ix<indexRange[3]+1;ix++){
-
- signal=fMapA2->GetSignal(iz,ix);
-
- globalIndex = iz*fNPixelsX+ix; // globalIndex starts from 0!
- if(!pList[globalIndex]){
-
- //
- // Create new list (6 elements - 3 signals and 3 tracks + total sig)
- //
-
- pList[globalIndex] = new Float_t [6];
-
- // set list to -2
-
- *pList[globalIndex] = -2.;
- *(pList[globalIndex]+1) = -2.;
- *(pList[globalIndex]+2) = -2.;
- *(pList[globalIndex]+3) = 0.;
- *(pList[globalIndex]+4) = 0.;
- *(pList[globalIndex]+5) = 0.;
-
-
- *pList[globalIndex] = (float)label;
- *(pList[globalIndex]+3) = signal;
- }
- else{
-
- // check the signal magnitude
-
- highest = *(pList[globalIndex]+3);
- middle = *(pList[globalIndex]+4);
- lowest = *(pList[globalIndex]+5);
-
- signal -= (highest+middle+lowest);
-
- //
- // compare the new signal with already existing list
- //
-
- if(signal<lowest) continue; // neglect this track
+ // Array of pointers to store the track index of the digits
+ // leave +1, otherwise pList crashes when col=256, row=192
+ AliITSpList *pList = new AliITSpList(GetNPixelsZ()+1,GetNPixelsX()+1);
- if (signal>highest){
- *(pList[globalIndex]+5) = middle;
- *(pList[globalIndex]+4) = highest;
- *(pList[globalIndex]+3) = signal;
+ // noise setting
+ SetFluctuations(pList,module);
- *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
- *(pList[globalIndex]+1) = *pList[globalIndex];
- *pList[globalIndex] = label;
- }
- else if (signal>middle){
- *(pList[globalIndex]+5) = middle;
- *(pList[globalIndex]+4) = signal;
+ HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,pList);
- *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
- *(pList[globalIndex]+1) = label;
- }
- else{
- *(pList[globalIndex]+5) = signal;
- *(pList[globalIndex]+2) = label;
- }
- }
- } // end of loop pixels in x
- } // end of loop over pixels in z
+ // apply mask to SPD module
+ SetMask();
+ CreateDigit(module,pList);
+ // clean memory
+ delete[] frowpixel;
+ delete[] fcolpixel;
+ delete[] fenepixel;
+ fMapA2->ClearMap();
+ delete pList;
}
+//______________________________________________________________________
+void AliITSsimulationSPD::SDigitsToDigits(Int_t module,AliITSpList *pList) {
+ // sum digits to Digits.
+ FillMapFrompList(pList);
-//---------------------------------------------
-void AliITSsimulationSPD::ChargeToSignal(Float_t **pList) {
- // charge to signal
-
- AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
-
-
- TRandom *random = new TRandom();
- Float_t threshold = (float)fResponse->MinVal();
-
- Int_t digits[3], tracks[3],gi,j1;
- Float_t charges[3];
- Float_t electronics;
- Float_t signal,phys;
- Int_t iz,ix;
- for(iz=0;iz<fNPixelsZ;iz++){
- for(ix=0;ix<fNPixelsX;ix++){
- electronics = fBaseline + fNoise*random->Gaus();
- signal = (float)fMapA2->GetSignal(iz,ix);
- signal += electronics;
- if (signal > threshold) {
- digits[0]=iz;
- digits[1]=ix;
- digits[2]=1;
- gi =iz*fNPixelsX+ix; // global index
- for(j1=0;j1<3;j1++){
- tracks[j1] = (Int_t)(*(pList[gi]+j1));
- charges[j1] = 0;
- }
- phys=0;
- aliITS->AddDigit(0,phys,digits,tracks,charges);
- if(pList[gi]) delete [] pList[gi];
- }
- }
- }
- delete [] pList;
+ // noise setting
+ SetFluctuations(pList,module);
+ // apply mask to SPD module
+ SetMask();
+ CreateDigit(module,pList);
}
+//______________________________________________________________________
+void AliITSsimulationSPD::UpdateMapSignal(Int_t row,Int_t col,Int_t trk,
+ Int_t hit,Int_t mod,Double_t ene,
+ AliITSpList *pList) {
+ // updates the Map of signal, adding the energy (ene) released by
+ // the current track
+
+ fMapA2->AddSignal(row,col,ene);
+ pList->AddSignal(row,col,trk,hit,mod,ene);
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::UpdateMapNoise(Int_t row,Int_t col,Int_t mod,
+ Double_t ene,AliITSpList *pList) {
+ // updates the Map of noise, adding the energy (ene) give my noise
-
-//____________________________________________
-
+ fMapA2->AddSignal(row,col,ene);
+ pList->AddNoise(row,col,mod,ene);
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::HitsToAnalogDigits(AliITSmodule *mod,
+ Int_t *frowpixel,Int_t *fcolpixel,
+ Double_t *fenepixel,
+ AliITSpList *pList) {
+ // Loops over all hits to produce Analog/floting point digits. This
+ // is also the first task in producing standard digits.
+
+ // loop over hits in the module
+ Int_t hitpos,nhits = mod->GetNhits();
+ for (hitpos=0;hitpos<nhits;hitpos++) {
+ HitToDigit(mod,hitpos,frowpixel,fcolpixel,fenepixel,pList);
+ }// end loop over digits
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::HitToDigit(AliITSmodule *mod,Int_t hitpos,
+ Int_t *frowpixel,Int_t *fcolpixel,
+ Double_t *fenepixel,AliITSpList *pList) {
+ // Steering function to determine the digits associated to a given
+ // hit (hitpos)
+ // The digits are created by charge sharing (ChargeSharing) and by
+ // capacitive coupling (SetCoupling). At all the created digits is
+ // associated the track number of the hit (ntrack)
+ Double_t x1l=0.0,y1l=0.0,z1l=0.0,x2l=0.0,y2l=0.0,z2l=0.0;
+ Int_t r1,r2,c1,c2,row,col,npixel = 0;
+ Int_t ntrack;
+ Double_t ene=0.0,etot=0.0;
+ const Float_t kconv = 10000.; // cm -> microns
+ const Float_t kconv1= 0.277e9; // GeV -> electrons equivalent
+
+ if(!(mod->LineSegmentL(hitpos,x1l,x2l,y1l,y2l,z1l,z2l,etot,ntrack)))return;
+
+ x2l += x1l; y2l += y1l; z2l += z1l; // Convert to ending coordinate.
+ // positions shifted and converted in microns
+ x1l = x1l*kconv + fSegmentation->Dx()/2.;
+ z1l = z1l*kconv + fSegmentation->Dz()/2.;
+ // positions shifted and converted in microns
+ x2l = x2l*kconv + fSegmentation->Dx()/2.;
+ z2l = z2l*kconv + fSegmentation->Dz()/2.;
+ etot *= kconv1; // convert from GeV to electrons equivalent.
+ Int_t module = mod->GetIndex();
+
+ // to account for the effective sensitive area
+ // introduced in geometry
+ if (z1l<0 || z1l>fSegmentation->Dz()) return;
+ if (z2l<0 || z2l>fSegmentation->Dz()) return;
+ if (x1l<0 || x1l>fSegmentation->Dx()) return;
+ if (x2l<0 || x2l>fSegmentation->Dx()) return;
+
+ //Get the col and row number starting from 1
+ // the x direction is not inverted for the second layer!!!
+ fSegmentation->GetPadIxz(x1l, z1l, c1, r1);
+ fSegmentation->GetPadIxz(x2l, z2l, c2, r2);
+
+ // to account for unexpected equal entrance and
+ // exit coordinates
+ if (x1l==x2l) x2l=x2l+x2l*0.1;
+ if (z1l==z2l) z2l=z2l+z2l*0.1;
+
+ if ((r1==r2) && (c1==c2)){
+ // no charge sharing
+ npixel = 1;
+ frowpixel[npixel-1] = r1;
+ fcolpixel[npixel-1] = c1;
+ fenepixel[npixel-1] = etot;
+ } else {
+ // charge sharing
+ ChargeSharing(x1l,z1l,x2l,z2l,c1,r1,c2,r2,etot,
+ npixel,frowpixel,fcolpixel,fenepixel);
+ } // end if r1==r2 && c1==c2.
+
+ for (Int_t npix=0;npix<npixel;npix++){
+ row = frowpixel[npix];
+ col = fcolpixel[npix];
+ ene = fenepixel[npix];
+ UpdateMapSignal(row,col,ntrack,hitpos,module,ene,pList);
+ // Starting capacitive coupling effect
+ SetCoupling(row,col,ntrack,hitpos,module,pList);
+ } // end for npix
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::ChargeSharing(Float_t x1l,Float_t z1l,Float_t x2l,
+ Float_t z2l,Int_t c1,Int_t r1,Int_t c2,
+ Int_t r2,Float_t etot,
+ Int_t &npixel,Int_t *frowpixel,
+ Int_t *fcolpixel,Double_t *fenepixel){
+ // Take into account the geometrical charge sharing when the track
+ // crosses more than one pixel.
+ //
+ //Begin_Html
+ /*
+ <img src="picts/ITS/barimodel_2.gif">
+ </pre>
+ <br clear=left>
+ <font size=+2 color=red>
+ <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>.
+ </font>
+ <pre>
+ */
+ //End_Html
+ Float_t xa,za,xb,zb,dx,dz,dtot,dm,refr,refm,refc;
+ Float_t refn=0.;
+ Float_t arefm, arefr, arefn, arefc, azb, az2l, axb, ax2l;
+ Int_t dirx,dirz,rb,cb;
+ Int_t flag,flagrow,flagcol;
+ Double_t epar;
+
+ npixel = 0;
+ xa = x1l;
+ za = z1l;
+ dx = TMath::Abs(x1l-x2l);
+ if (dx == 0.) dx = 0.01;
+ dz = TMath::Abs(z1l-z2l);
+ if (dz == 0.) dz = 0.01;
+ dtot = TMath::Sqrt((dx*dx)+(dz*dz));
+ dm = (x2l - x1l) / (z2l - z1l);
+ if (dm == 0.) dm = 0.01;
+ dirx = (Int_t) ((x2l - x1l) / dx);
+ dirz = (Int_t) ((z2l - z1l) / dz);
+
+ // calculate the x coordinate of the pixel in the next column
+ // and the z coordinate of the pixel in the next row
+ Float_t xpos, zpos;
+
+ fSegmentation->GetPadCxz(c1, r1-1, xpos, zpos);
+
+ Float_t xsize = fSegmentation->Dpx(0);
+ Float_t zsize = fSegmentation->Dpz(r1-1);
+
+ if (dirx == 1) refr = xpos+xsize/2.;
+ else refr = xpos-xsize/2.;
+
+ if (dirz == 1) refn = zpos+zsize/2.;
+ else refn = zpos-zsize/2.;
+
+ flag = 0;
+ flagrow = 0;
+ flagcol = 0;
+ do{
+ // calculate the x coordinate of the intersection with the pixel
+ // in the next cell in row direction
+ refm = (refn - z1l)*dm + x1l;
+
+ // calculate the z coordinate of the intersection with the pixel
+ // in the next cell in column direction
+ refc = (refr - x1l)/dm + z1l;
+
+ arefm = refm * dirx;
+ arefr = refr * dirx;
+ arefn = refn * dirz;
+ arefc = refc * dirz;
+
+ if ((arefm < arefr) && (arefn < arefc)){
+ // the track goes in the pixel in the next cell in row direction
+ xb = refm;
+ zb = refn;
+ cb = c1;
+ rb = r1 + dirz;
+ azb = zb * dirz;
+ az2l = z2l * dirz;
+ if (rb == r2) flagrow=1;
+ if (azb > az2l) {
+ zb = z2l;
+ xb = x2l;
+ } // end if
+ // shift to the pixel in the next cell in row direction
+ Float_t zsizeNext = fSegmentation->Dpz(rb-1);
+ //to account for cell at the borders of the detector
+ if(zsizeNext==0) zsizeNext = zsize;
+ refn += zsizeNext*dirz;
+ }else {
+ // the track goes in the pixel in the next cell in column direction
+ xb = refr;
+ zb = refc;
+ cb = c1 + dirx;
+ rb = r1;
+ axb = xb * dirx;
+ ax2l = x2l * dirx;
+ if (cb == c2) flagcol=1;
+ if (axb > ax2l) {
+ zb = z2l;
+ xb = x2l;
+ } // end ifaxb > ax2l
+
+ // shift to the pixel in the next cell in column direction
+ Float_t xsizeNext = fSegmentation->Dpx(cb-1);
+ //to account for cell at the borders of the detector
+ if(xsizeNext==0) xsizeNext = xsize;
+ refr += xsizeNext*dirx;
+ } // end if (arefm < arefr) && (arefn < arefc)
+
+ //calculate the energy lost in the crossed pixel
+ epar = TMath::Sqrt((xb-xa)*(xb-xa)+(zb-za)*(zb-za));
+ epar = etot*(epar/dtot);
+
+ //store row, column and energy lost in the crossed pixel
+ frowpixel[npixel] = r1;
+ fcolpixel[npixel] = c1;
+ fenepixel[npixel] = epar;
+ npixel++;
+
+ // the exit point of the track is reached
+ if (epar == 0) flag = 1;
+ if ((r1 == r2) && (c1 == c2)) flag = 1;
+ if (flag!=1) {
+ r1 = rb;
+ c1 = cb;
+ xa = xb;
+ za = zb;
+ } // end if flag!=1
+ } while (flag==0);
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::SetCoupling(Int_t row, Int_t col, Int_t ntrack,
+ Int_t idhit,Int_t module,
+ AliITSpList *pList) {
+ // 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
+ /*
+ <img src="picts/ITS/barimodel_3.gif">
+ </pre>
+ <br clear=left>
+ <font size=+2 color=red>
+ <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>.
+ </font>
+ <pre>
+ */
+ //End_Html
+ Int_t j1,j2,flag=0;
+ Double_t pulse1,pulse2;
+ Float_t couplR=0.0,couplC=0.0;
+
+ GetCouplings(couplR,couplC);
+ j1 = row;
+ j2 = col;
+ pulse1 = fMapA2->GetSignal(row,col);
+ pulse2 = pulse1;
+ for (Int_t isign=-1;isign<=1;isign+=2){// loop in row direction
+ do{
+ j1 += isign;
+ pulse1 *= couplR;
+ if ((j1<0) || (j1>GetNPixelsZ()-1) || (pulse1<GetThreshold())){
+ pulse1 = fMapA2->GetSignal(row,col);
+ j1 = row;
+ flag = 1;
+ }else{
+ UpdateMapSignal(j1,col,ntrack,idhit,module,pulse1,pList);
+ flag = 0;
+ } // end if
+ } while(flag == 0);
+ // loop in column direction
+ do{
+ j2 += isign;
+ pulse2 *= couplC;
+ if ((j2<0) || (j2>(GetNPixelsX()-1)) || (pulse2<GetThreshold())){
+ pulse2 = fMapA2->GetSignal(row,col);
+ j2 = col;
+ flag = 1;
+ }else{
+ UpdateMapSignal(row,j2,ntrack,idhit,module,pulse2,pList);
+ flag = 0;
+ } // end if
+ } while(flag == 0);
+ } // for isign
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::CreateDigit(Int_t module,AliITSpList *pList) {
+ // The pixels are fired if the energy deposited inside them is above
+ // the threshold parameter ethr. Fired pixed are interpreted as digits
+ // and stored in the file digitfilename. One also needs to write out
+ // cases when there is only noise (nhits==0).
+
+ static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
+
+ Int_t digits[3];
+ Int_t tracks[3];
+ Int_t hits[3];
+ Float_t charges[3];
+ Int_t j1;
+
+ for (Int_t r=1;r<=GetNPixelsZ();r++) {
+ for (Int_t c=1;c<=GetNPixelsX();c++) {
+ // check if the deposited energy in a pixel is above the
+ // threshold
+ Float_t signal = (Float_t) fMapA2->GetSignal(r,c);
+ if ( signal > GetThreshold()) {
+ digits[0] = r-1; // digits starts from 0
+ digits[1] = c-1; // digits starts from 0
+ //digits[2] = 1;
+ digits[2] = (Int_t) signal; // the signal is stored in
+ // electrons
+ for(j1=0;j1<3;j1++){
+ tracks[j1] = pList->GetTrack(r,c,j1);
+ hits[j1] = pList->GetHit(r,c,j1);
+ charges[j1] = 0;
+ } // end for j1
+ Float_t phys = 0;
+ aliITS->AddSimDigit(0,phys,digits,tracks,hits,charges);
+ } // end if of threshold condition
+ } // for c
+ }// end do on pixels
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::SetFluctuations(AliITSpList *pList,Int_t module) {
+ // Set the electronic noise and threshold non-uniformities to all the
+ // pixels in a detector.
+ // The parameter fSigma is the squared sum of the sigma due to noise
+ // and the sigma of the threshold distribution among pixels.
+ //
+ //Begin_Html
+ /*
+ <img src="picts/ITS/barimodel_1.gif">
+ </pre>
+ <br clear=left>
+ <font size=+2 color=red>
+ <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>.
+ </font>
+ <pre>
+ */
+ //End_Html
+ Float_t thr=0.0,sigm=0.0;
+ Double_t signal,sigma;
+ Int_t iz,ix;
+
+ GetThresholds(thr,sigm);
+ sigma = (Double_t) sigm;
+ for(iz=1;iz<=GetNPixelsZ();iz++){
+ for(ix=1;ix<=GetNPixelsX();ix++){
+ signal = sigma*gRandom->Gaus();
+ fMapA2->SetHit(iz,ix,signal);
+ // insert in the label-signal-hit list the pixels fired
+ // only by noise
+ pList->AddNoise(iz,ix,module,signal);
+ } // end of loop on pixels
+ } // end of loop on pixels
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::SetMask() {
+ // Apply a mask to the SPD module. 1% of the pixel channels are
+ // masked. When the database will be ready, the masked pixels
+ // should be read from it.
+ Double_t signal;
+ Int_t iz,ix,im;
+ Float_t totMask;
+ Float_t perc = ((AliITSresponseSPD*)fResponse)->GetFractionDead();
+ // in this way we get the same set of random numbers for all runs.
+ // This is a cluge for now.
+ static TRandom *rnd = new TRandom();
+
+ totMask= perc*GetNPixelsZ()*GetNPixelsX();
+ for(im=1;im<totMask;im++){
+ do{
+ ix=(Int_t)(rnd->Rndm()*(GetNPixelsX()-1.) + 1.);
+ } while(ix<=0 || ix>GetNPixelsX());
+ do{
+ iz=(Int_t)(rnd->Rndm()*(GetNPixelsZ()-1.) + 1.);
+ } while(iz<=0 || iz>GetNPixelsZ());
+ signal = -1.;
+ fMapA2->SetHit(iz,ix,signal);
+ } // end loop on masked pixels
+}
+//______________________________________________________________________
void AliITSsimulationSPD::CreateHistograms() {
- // CreateHistograms
-
- Int_t i;
- for(i=0;i<fNPixelsZ;i++) {
- TString *spdname = new TString("spd_");
- Char_t candnum[4];
- sprintf(candnum,"%d",i+1);
- spdname->Append(candnum);
- (*fHis)[i] = new TH1F(spdname->Data(),"SPD maps",
- fNPixelsX,0.,(Float_t) fNPixelsX);
- delete spdname;
- }
+ // Create Histograms
+ Int_t i;
+ fHis=new TObjArray(GetNPixelsZ());
+ for(i=0;i<GetNPixelsZ();i++) {
+ TString spdname("spd_");
+ Char_t candnum[4];
+ sprintf(candnum,"%d",i+1);
+ spdname.Append(candnum);
+ (*fHis)[i] = new TH1F(spdname.Data(),"SPD maps",
+ GetNPixelsX(),0.,(Float_t) GetNPixelsX());
+ } // end for i
}
-
-//____________________________________________
-
+//______________________________________________________________________
void AliITSsimulationSPD::ResetHistograms() {
- //
// Reset histograms for this detector
- //
Int_t i;
- for(i=0;i<fNPixelsZ;i++ ) {
- if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset();
- }
+ for(i=0;i<GetNPixelsZ();i++ ) {
+ if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset();
+ } // end for i
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::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;i<ni;i++)for(j=0;j<nj;j++){
+ if(pList->GetSignalOnly(i,j)>0.0){
+ aliITS->AddSumDigit(*(pList->GetpListItem(i,j)));
+// cout << "pListSPD: " << *(pList->GetpListItem(i,j)) << endl;
+ } // end if
+ } // end for i,j
+ return;
+}
+//______________________________________________________________________
+void AliITSsimulationSPD::FillMapFrompList(AliITSpList *pList){
+ // Fills fMap2A from the pList of Summable digits
+ Int_t k,ix;
+
+ for(k=0;k<GetNPixelsZ();k++)for(ix=0;ix<GetNPixelsX();ix++)
+ fMapA2->AddSignal(k,ix,pList->GetSignal(k,ix));
+ return;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff