+/**************************************************************************
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <Riostream.h>
#include <TObjArray.h>
-
-#include "AliITSsimulationSSD.h"
-#include "AliITSdictSSD.h"
-#include "AliITSdcsSSD.h"
+#include <TRandom.h>
+
+#include "AliITSmodule.h"
+#include "AliITSMapA2.h"
+#include "AliITSpList.h"
+#include "AliITSCalibrationSSD.h"
+#include "AliITSsegmentationSSD.h"
+//#include "AliITSdcsSSD.h"
#include "AliITS.h"
+#include "AliITShit.h"
+#include "AliITSdigitSSD.h"
#include "AliRun.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];
-
-
- fSteps = 10; // still hard-wired - set in SetDetParam and get it via
- // fDCS together with the others eventually
-
+#include "AliITSgeom.h"
+#include "AliITSsimulationSSD.h"
+#include "AliITSTableSSD.h"
+#include <TF1.h>
+
+
+ClassImp(AliITSsimulationSSD)
+////////////////////////////////////////////////////////////////////////
+// //
+// Author: Enrico Fragiacomo //
+// enrico.fragiacomo@ts.infn.it //
+// Last revised: june 2008 //
+// //
+// AliITSsimulationSSD is the simulation of SSD. //
+////////////////////////////////////////////////////////////////////////
+
+//----------------------------------------------------------------------
+AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(),
+ //fDCS(0),
+fMapA2(0),
+fIonE(0.0),
+fDifConst(),
+fDriftVel(),
+fTimeResponse(NULL){
+ //default Constructor
+ //Inputs:
+ // none.
+ // Outputs:
+ // none.
+ // Return:
+ // A default construction AliITSsimulationSSD class
+}
+//----------------------------------------------------------------------
+AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp):
+AliITSsimulation(dettyp),
+//fDCS(0),
+fMapA2(0),
+fIonE(0.0),
+fDifConst(),
+fDriftVel(),
+fTimeResponse(NULL){
+ // Constructor
+ // Input:
+ // AliITSDetTypeSim Pointer to the SSD dettype to be used
+ // Outputs:
+ // none.
+ // Return
+ // A standard constructed AliITSsimulationSSD class
+
+ fTimeResponse = new TF1("ftimeresponse",".5*x*exp(1.-.5*x)");
+ Init();
}
-//___________________________________________________________________________
-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(){
+ // Inilizer, Inilizes all of the variable as needed in a standard place.
+ // Input:
+ // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used
+ // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used
+ // Outputs:
+ // none.
+ // Return
+ // none.
+ AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2);
+
+ SetDriftVelocity(); // use default values in .h file
+ SetIonizeE(); // use default values in .h file
+ SetDiffConst(); // use default values in .h file
+ fpList = new AliITSpList(2,GetNStrips());
+ fMapA2 = new AliITSMapA2(seg);
}
-//_____________________________________________________________
-AliITSsimulationSSD::AliITSsimulationSSD(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];
+ this->fTimeResponse = s.fTimeResponse;
+ return *this;
+}
+/*
+//______________________________________________________________________
+AliITSsimulation& AliITSsimulationSSD::operator=(
+ const AliITSsimulation &s){
+ // Operator =
+
+ if(this==&s) return *this;
+ Error("AliITSsimulationSSD","Not allowed to make a = with "
+ "AliITSsimulationSSD Using default creater instead");
+
+ return *this;
+}
+*/
+//______________________________________________________________________
+AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source):
+ AliITSsimulation(source),
+fMapA2(source.fMapA2),
+fIonE(source.fIonE),
+fDifConst(),
+fDriftVel(),
+fTimeResponse(source.fTimeResponse){
// copy constructor
- *this = source;
+ fDifConst[0] = source.fDifConst[0];
+ fDifConst[1] = source.fDifConst[1];
+ fDriftVel[0] = source.fDriftVel[0];
+ fDriftVel[1] = source.fDriftVel[1];
}
-//____________________________________________________________________________
+//______________________________________________________________________
AliITSsimulationSSD::~AliITSsimulationSSD() {
- // anihilator
+ // destructor
+ delete fMapA2;
+ delete fTimeResponse;
+ //delete fDCS;
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){
+ // Creates maps to build the list of tracks for each sumable digit
+ // Inputs:
+ // Int_t module // Module number to be simulated
+ // Int_t event // Event number to be simulated
+ // Outputs:
+ // none.
+ // Return
+ // none.
+
+ SetModuleNumber(module);
+ SetEventNumber(event);
+ fMapA2->ClearMap();
+ fpList->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::FinishSDigitiseModule(){
+ // Does the Sdigits to Digits work
+ // Inputs:
+ // none.
+ // Outputs:
+ // none.
+ // Return:
+ // none.
+
+ FillMapFrompList(fpList); // need to check if needed here or not????
+ SDigitToDigit(fModule,fpList);
+ fpList->ClearMap();
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) {
+ // Digitizes hits for one SSD module
+ SetModuleNumber(mod->GetIndex());
+
+ HitsToAnalogDigits(mod,fpList);
+ SDigitToDigit(GetModuleNumber(),fpList);
+
+ fpList->ClearMap();
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) {
+ // Produces Summable/Analog digits and writes them to the SDigit tree.
- if(fP) delete fP;
- if(fN) delete fN;
-
- if(fTracksP) delete fTracksP;
- if(fTracksN) delete fTracksN;
-
- delete fDCS;
-}
-//_______________________________________________________________
-//
-// Hit to digit
-//_______________________________________________________________
-//
-void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module,
- Int_t dummy) {
- // Digitizes one SSD module of hits.
+ HitsToAnalogDigits(mod,fpList);
+
+ WriteSDigits(fpList);
- TObjArray *hits = mod->GetHits();
- Int_t nhits = hits->GetEntriesFast();
- if (!nhits) return;
-
- Int_t i;
- for(i=0; i<fNstrips; i++) {
- (*fP)[i] = 0;
- (*fN)[i] = 0;
- fTracksP[i].ZeroTracks();
- fTracksN[i].ZeroTracks();
+ fpList->ClearMap();
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){
+ // Takes the pList and finishes the digitization.
+
+ ApplyNoise(pList,module);
+ ApplyCoupling(pList,module);
+ ApplyDeadChannels(module);
+
+ ChargeToSignal(module,pList);
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::HitsToAnalogDigits(AliITSmodule *mod,
+ AliITSpList *pList){
+ // Loops over all hits to produce Analog/floating point digits. This
+ // is also the first task in producing standard digits.
+ Int_t lasttrack = -2;
+ Int_t idtrack = -2;
+ Double_t x0=0.0, y0=0.0, z0=0.0;
+ Double_t x1=0.0, y1=0.0, z1=0.0;
+ Double_t de=0.0;
+ Int_t module = mod->GetIndex();
+ Double_t tof = 0.;
+
+
+ AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2);
+
+ TObjArray *hits = mod->GetHits();
+ Int_t nhits = hits->GetEntriesFast();
+ if (nhits<=0) return;
+ AliITSTableSSD * tav = new AliITSTableSSD(GetNStrips());
+ module = mod->GetIndex();
+ if ( mod->GetLayer() == 6 ) seg->SetLayer(6);
+ if ( mod->GetLayer() == 5 ) seg->SetLayer(5);
+ for(Int_t i=0; i<nhits; i++) {
+ // LineSegmentL returns 0 if the hit is entering
+ // If hits is exiting returns positions of entering and exiting hits
+ // Returns also energy loss
+ if(GetDebug(4)){
+ cout << i << " ";
+ cout << mod->GetHit(i)->GetXL() << " "<<mod->GetHit(i)->GetYL();
+ cout << " " << mod->GetHit(i)->GetZL();
+ cout << endl;
+ } // end if
+ if (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) {
+
+ // Scale down dE/dx according to the hit's TOF wrt to the trigger
+ // Necessary for pileup simulation
+ // EF - 21/04/09
+ tof = mod->GetHit(i)->GetTOF();
+ tof *= 1.E+6; // convert time in microsecond
+ if(tof<2.) de = de * fTimeResponse->Eval(-1.*tof+2.);
+ else de = 0.;
+ //
+
+ HitToDigit(module, x0, y0, z0, x1, y1, z1, de,tav);
+ if (lasttrack != idtrack || i==(nhits-1)) {
+ GetList(idtrack,i,module,pList,tav);
+ } // end if
+ lasttrack=idtrack;
+ } // end if
+ } // end loop over hits
+ delete tav; tav=0;
+ return;
+}
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0,
+ Double_t z0, Double_t x1, Double_t y1,
+ Double_t z1, Double_t de,
+ AliITSTableSSD *tav) {
+
+ // hit to digit conversion
+
+ AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2);
+ // Turns hits in SSD module into one or more digits.
+ //Float_t tang[2] = {0.0,0.0};
+ //seg->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo
+ Double_t x, y, z;
+ Double_t dex=0.0, dey=0.0, dez=0.0;
+ Double_t pairs; // pair generation energy per step.
+ Double_t sigma[2] = {0.,0.};// standard deviation of the diffusion gaussian
+ Double_t tdrift[2] = {0.,0.}; // time of drift
+ Double_t w;
+ Double_t inf[2], sup[2], par0[2];
+
+ // Steps in the module are determined "manually" (i.e. No Geant)
+ // NumOfSteps divide path between entering and exiting hits in steps
+ Int_t numOfSteps = NumOfSteps(x1, y1, z1, dex, dey, dez);
+ // Enery loss is equally distributed among steps
+ de = de/numOfSteps;
+ pairs = de/GetIonizeE(); // e-h pairs generated
+
+ //-----------------------------------------------------
+ // stepping
+ //-----------------------------------------------------
+ for(Int_t j=0; j<numOfSteps; j++) { // stepping
+
+ x = x0 + (j+0.5)*dex;
+ y = y0 + (j+0.5)*dey;
+ if ( y > (seg->Dy()/2+10)*1.0E-4 ) {
+ // check if particle is within the detector
+ Warning("HitToDigit",
+ "hit out of detector y0=%e,y=%e,dey=%e,j =%d module=%d, exceed=%e",
+ y0,y,dey,j,module, y-(seg->Dy()/2+10)*1.0E-4);
+ return;
+ } // end if
+ z = z0 + (j+0.5)*dez;
+
+ if(GetDebug(4)) cout <<"HitToDigit "<<x<<" "<<y<<" "<<z<< " "
+ <<dex<<" "<<dey<<" "<<dez<<endl;
+
+ if(seg->GetLayer()==6) {
+ y=-y; // Lay6 module has sensor up-side-down!!!
}
- for(i=0; i<nhits; i++) {
- Int_t idtrack=mod->GetHitTrackIndex(i);
- HitToDigit(i,idtrack,nhits,hits);
- }
-
-
-
- ApplyNoise();
- ApplyCoupling();
- ApplyThreshold();
- ApplyDAQ();
-
-
-}
-
-//---------------------------------------------------------------
-
-void AliITSsimulationSSD::HitToDigit(Int_t & hitNo,Int_t idtrack,
- Int_t nhits,TObjArray *hits) {
- // Turns one or more hits in an SSD module into one or more digits.
-
- Int_t stripP, stripN, i;
- Float_t dsP, dsN;
- Float_t sP, sN;
- Float_t eP, eN;
- Float_t arrayEP[10]; // hard-wired number of steps
- Float_t arrayEN[10];
- Int_t track = -1;
-
- Float_t ionization = 0;
- Float_t signal;
+ // w is the coord. perpendicular to the strips
+ // Float_t xp=x*1.e+4,zp=z*1.e+4; // microns
+ Float_t xp=x,zp=z;
+ seg->GetPadTxz(xp,zp);
+
+ Int_t k;
+ //---------------------------------------------------------
+ // Pside
+ //------------------------------------------------------------
+ k=0;
- AliITSdictSSD *dict;
+ // calculate drift time
+ // y is the minimum path
+ tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0);
-
- // check if this is the right order !!!!!
-
- AliITShit *hitI = (AliITShit*)hits->At(hitNo++);
- AliITShit *hitE = (AliITShit*)hits->At(hitNo);
-
-
- while (!((hitE->StatusExiting()) ||
- (hitE->StatusDisappeared()) ||
- (hitE->StatusStop()))) {
-
- if (++hitNo<nhits) {
- ionization = hitE->GetIonization();
- hitE = (AliITShit*)hits->At(hitNo);
- }
- }
+ w = xp; // P side strip number
-
- 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);
+ if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
+ // this check rejects hits in regions not covered by strips
+ // 0.5 takes into account boundaries
+ if(GetDebug(4)) cout << "Dead SSD region, x,z="<<x<<","<<z<<endl;
+ return; // There are dead region on the SSD sensitive volume!!!
+ } // end if
- xI *= kconvm;
- yI *= kconvm;
- zI *= kconvm;
+ // sigma is the standard deviation of the diffusion gaussian
+ if(tdrift[k]<0) return;
- Float_t xE, yE, zE;
- hitE->GetPositionL(xE, yE, zE);
+ sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]);
+ sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch
- xE *= kconvm;
- yE *= kconvm;
- zE *= kconvm;
-
- Float_t dx = (xE - xI);
- Float_t dz = (zE - zI);
-
+ if(sigma[k]==0.0) {
+ Error("HitToDigit"," sigma[%d]=0",k);
+ exit(0);
+ } // end if
- // 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);
- */
+ par0[k] = pairs;
+ // we integrate the diffusion gaussian from -3sigma to 3sigma
+ inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average
+ sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average
+ // IntegrateGaussian does the actual
+ // integration of diffusion gaussian
+ IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav);
- // end of debuging
+ //------------------------------------------------------
+ // end Pside
+ //-------------------------------------------------------
+ //------------------------------------------------------
+ // Nside
+ //-------------------------------------------------------
+ k=1;
+ tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1);
- eP=0;
- eN=0;
+ //tang[k]=TMath::Tan(tang[k]);
- for (i=0; i<fSteps; i++) {
-
- // arrayEP[i] = gRandom->Landau(ionization/fSteps, ionization/(4*fSteps));
- // arrayEN[i] = gRandom->Landau(ionization/fSteps, ionization/(4*fSteps));
- arrayEP[i] = ionization/fSteps;
- arrayEN[i] = ionization/fSteps;
-
- eP += arrayEP[i];
- eN += arrayEN[i];
- }
-
- const Float_t kconv = 1.0e9 / 3.6; // GeV -> e-hole pairs
-
- for(i=0; i<fSteps; i++) {
+ w = zp; // N side strip number
- arrayEP[i] = kconv * arrayEP[i] * (ionization / eP);
- arrayEN[i] = kconv * arrayEN[i] * (ionization / eN);
- }
-
- dx /= fSteps;
- dz /= fSteps;
-
- Float_t sigmaP, sigmaN;
- fResponse->SigmaSpread(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; i<fSteps; i++) {
-
- Int_t j;
-
- fSegmentation->GetPadIxz(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));
- if(sP<=0.0) sP = sigmaP*sqrt(300.);
- sN = sigmaN * sqrt(300. * i /(fSteps-i));
- if(sN<=0.0) sN = sigmaN*sqrt(300.);
-
-
- 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;
- }
+ if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
+ // this check rejects hits in regions not covered by strips
+ // 0.5 takes into account boundaries
+ if(GetDebug(4)) cout << "Dead SSD region, x,z="<<x<<","<<z<<endl;
+ return; // There are dead region on the SSD sensitive volume.
+ } // end if
+
+ // sigma is the standard deviation of the diffusion gaussian
+ if(tdrift[k]<0) return;
+ sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]);
+ sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch
+ if(sigma[k]==0.0) {
+ Error("HitToDigit"," sigma[%d]=0",k);
+ exit(0);
+ } // end if
+
+ par0[k] = pairs;
+ // we integrate the diffusion gaussian from -3sigma to 3sigma
+ inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average
+ sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average
+ // IntegrateGaussian does the actual
+ // integration of diffusion gaussian
+ IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav);
+
+ //-------------------------------------------------
+ // end Nside
+ //-------------------------------------------------
+
+
+ } // end stepping
}
-
-//____________________________________________________________________
-//
-// Private Methods for Simulation
//______________________________________________________________________
-//
-
-void AliITSsimulationSSD::ApplyNoise() {
+void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){
// Apply Noise.
- Float_t noiseP, noiseN;
- fResponse->GetNoiseParam(noiseP,noiseN);
-
- Int_t i;
- for(i = 0; i<fNstrips; i++) {
- (*fP)[i] += gRandom->Gaus(0,noiseP);
- (*fN)[i] += gRandom->Gaus(0,noiseN);
- }
+ Int_t ix;
+ Double_t signal,noise;
+ AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module);
+
+ // Pside
+ for(ix=0;ix<GetNStrips();ix++){ // loop over strips
+
+ // noise is gaussian
+ noise = (Double_t) gRandom->Gaus(0,res->GetNoiseP(ix));
+
+ // need to calibrate noise
+ // NOTE. noise from the calibration database comes uncalibrated,
+ // it needs to be calibrated in order to be added
+ // to the signal. It will be decalibrated later on together with the noise
+ noise *= (Double_t) res->GetGainP(ix);
+
+ // noise comes in ADC channels from the calibration database
+ // It needs to be converted back to electronVolts
+ noise /= res->GetSSDDEvToADC(1.);
+
+ // Finally, noise is added to the signal
+ signal = noise + fMapA2->GetSignal(0,ix);//get signal from map
+ fMapA2->SetHit(0,ix,signal); // give back signal to map
+ if(signal>0.0) pList->AddNoise(0,ix,module,noise);
+ } // loop over strip
+
+ // Nside
+ for(ix=0;ix<GetNStrips();ix++){ // loop over strips
+ noise = (Double_t) gRandom->Gaus(0,res->GetNoiseN(ix));// give noise to signal
+ noise *= (Double_t) res->GetGainN(ix);
+ noise /= res->GetSSDDEvToADC(1.);
+ signal = noise + fMapA2->GetSignal(1,ix);//get signal from map
+ fMapA2->SetHit(1,ix,signal); // give back signal to map
+ if(signal>0.0) pList->AddNoise(1,ix,module,noise);
+ } // loop over strip
+
}
-
-//_________________________________________________________________________
-
-void AliITSsimulationSSD::ApplyCoupling() {
- // Apply the effecto of electronic coupling between channels
- Int_t i;
- for(i = 1; i<fNstrips-1; i++) {
- (*fP)[i] += (*fP)[i-1]*fDCS->GetCouplingPL() + (*fP)[i+1]*fDCS->GetCouplingPR();
- (*fN)[i] += (*fN)[i-1]*fDCS->GetCouplingNL() + (*fN)[i+1]*fDCS->GetCouplingNR();
- }
+//______________________________________________________________________
+void AliITSsimulationSSD::ApplyCoupling(AliITSpList *pList,Int_t module) {
+ // Apply the effect of electronic coupling between channels
+ Int_t ix;
+ Double_t signal=0;
+ //AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module);
+ AliITSSimuParam* res = fDetType->GetSimuParam();
+
+ Double_t *contrLeft = new Double_t[GetNStrips()];
+ Double_t *contrRight = new Double_t[GetNStrips()];
+
+ // P side coupling
+ for(ix=0;ix<GetNStrips();ix++){
+ if(ix>0) contrLeft[ix] = fMapA2->GetSignal(0,ix-1)*res->GetSSDCouplingPL();
+ else contrLeft[ix] = 0.0;
+ if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(0,ix+1)*res->GetSSDCouplingPR();
+ else contrRight[ix] = 0.0;
+ } // loop over strips
+
+ for(ix=0;ix<GetNStrips();ix++){
+ signal = contrLeft[ix] + contrRight[ix] - res->GetSSDCouplingPL() * fMapA2->GetSignal(0,ix)
+ - res->GetSSDCouplingPR() * fMapA2->GetSignal(0,ix);
+ fMapA2->AddSignal(0,ix,signal);
+ if(signal>0.0) pList->AddNoise(0,ix,module,signal);
+ } // loop over strips
+
+ // N side coupling
+ for(ix=0;ix<GetNStrips();ix++){
+ if(ix>0) contrLeft[ix] = fMapA2->GetSignal(1,ix-1)*res->GetSSDCouplingNL();
+ else contrLeft[ix] = 0.0;
+ if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(1,ix+1)*res->GetSSDCouplingNR();
+ else contrRight[ix] = 0.0;
+ } // loop over strips
+
+ for(ix=0;ix<GetNStrips();ix++){
+ signal = contrLeft[ix] + contrRight[ix] - res->GetSSDCouplingNL() * fMapA2->GetSignal(0,ix)
+ - res->GetSSDCouplingNR() * fMapA2->GetSignal(0,ix);
+ fMapA2->AddSignal(1,ix,signal);
+ if(signal>0.0) pList->AddNoise(1,ix,module,signal);
+ } // loop over strips
+
+
+ delete [] contrLeft;
+ delete [] contrRight;
}
-//__________________________________________________________________________
-
-void AliITSsimulationSSD::ApplyThreshold() {
- // Applies the effect of a threshold on the signals for digitization.
- Float_t noiseP, noiseN;
- fResponse->GetNoiseParam(noiseP,noiseN);
-
- // or introduce the SetThresholds in fResponse
+//______________________________________________________________________
+void AliITSsimulationSSD::ApplyDeadChannels(Int_t module) {
+ // Kill dead channels setting gain to zero
- Int_t i;
- for(i=0; i<fNstrips; i++) {
- (*fP)[i] = ((*fP)[i] > noiseP*4) ? (*fP)[i] : 0;
- (*fN)[i] = ((*fN)[i] > noiseN*4) ? (*fN)[i] : 0;
- }
-
-}
+ AliITSCalibrationSSD* res = (AliITSCalibrationSSD*)GetCalibrationModel(module);
-//__________________________________________________________________________
+ for(Int_t i=0;i<GetNStrips();i++){
-void AliITSsimulationSSD::ApplyDAQ() {
- // Converts simulated signals to simulated ADC counts
- AliITS *its=(AliITS*)gAlice->GetModule("ITS");
+ if(res->IsPChannelBad(i)) res->SetGainP(i,0.0);
+ if(res->IsNChannelBad(i)) res->SetGainN(i,0.0);
- Float_t noiseP, noiseN;
- fResponse->GetNoiseParam(noiseP,noiseN);
+ } // loop over strips
- char opt[30],dummy[20];
- fResponse->ParamOptions(opt,dummy);
+}
- Int_t i,j;
- if (strstr(opt,"SetInvalid")) {
- // Set signal = 0 if invalid strip
- for(i=0; i<fNstrips; i++) {
- if (!(fDCS->IsValidP(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; i<fNstrips; i++) {
- if( (strstr(opt,"SetInvalid") && (*fP)[i] < noiseP*4) || !(*fP)[i]) continue;
- digits[0]=1;
- digits[1]=i;
- digits[2]=(int)(*fP)[i];
- for(j=0; j<(fTracksP+i)->GetNTracks(); 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; i<fNstrips; i++) {
- if( (strstr(opt,"SetInvalid") && (*fN)[i] < noiseN*4)|| !(*fN)[i]) continue;
- digits[0]=0;
- digits[1]=i;
- digits[2]=(int)(*fN)[i];
- for( j=0; j<(fTracksN+i)->GetNTracks(); 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);
-
- }
+//______________________________________________________________________
+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);
+
+ if (numOfSteps < 1) numOfSteps = 1; // one step, at least
+ //numOfSteps=1;
+
+ // we could condition the stepping depending on the incident angle
+ // of the track
+ dex = x/numOfSteps;
+ dey = y/numOfSteps;
+ dez = z/numOfSteps;
+ return numOfSteps;
}
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::GetList(Int_t label,Int_t hit,Int_t mod,
+ AliITSpList *pList,AliITSTableSSD *tav) {
+ // loop over nonzero digits
+ Int_t ix,i;
+ Double_t signal=0.;
+
+ for(Int_t k=0; k<2; k++) {
+ ix=tav->Use(k);
+ while(ix>-1){
+ signal = fMapA2->GetSignal(k,ix);
+ if(signal==0.0) {
+ ix=tav->Use(k);
+ continue;
+ } // end if signal==0.0
+ // check the signal magnitude
+ for(i=0;i<pList->GetNSignals(k,ix);i++){
+ signal -= pList->GetTSignal(k,ix,i);
+ } // end for i
+ // compare the new signal with already existing list
+ if(signal>0)pList->AddSignal(k,ix,label,hit,mod,signal);
+ ix=tav->Use(k);
+ } // end of loop on strips
+ } // end of loop on P/N side
+ tav->Clear();
+}
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::ChargeToSignal(Int_t module,AliITSpList *pList) {
+ // charge to signal
+ static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
+ Float_t threshold = 0.;
+ Int_t size = AliITSdigitSSD::GetNTracks();
+ Int_t * digits = new Int_t[size];
+ Int_t * tracks = new Int_t[size];
+ Int_t * hits = new Int_t[size];
+ Int_t j1;
+ Float_t charges[3] = {0.0,0.0,0.0};
+ Float_t signal;
+ AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module);
+ AliITSSimuParam* simpar = fDetType->GetSimuParam();
+
+ for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
+ for(Int_t ix=0;ix<GetNStrips();ix++){ // loop over strips
+
+ // if strip is dead -> gain=0
+ if( ((k==0)&&(res->GetGainP(ix)==0)) || ((k==1)&&(res->GetGainN(ix)==0))) continue;
+
+ signal = fMapA2->GetSignal(k,ix);
+ // signal has to be uncalibrated
+ // In real life, gains are supposed to be calculated from calibration runs,
+ // stored in the calibration DB and used in the reconstruction
+ // (see AliITSClusterFinderSSD.cxx)
+ if(k==0) signal /= res->GetGainP(ix);
+ else signal /= res->GetGainN(ix);
+
+ // signal is converted in unit of ADC
+ signal = res->GetSSDDEvToADC(signal);
+ if(signal>4095.) signal = 4095.;//if exceeding, accumulate last one
+
+ // threshold for zero suppression is set on the basis of the noise
+ // A good value is 3*sigma_noise
+ if(k==0) threshold = res->GetNoiseP(ix);
+ else threshold = res->GetNoiseN(ix);
+
+ threshold *= simpar->GetSSDZSThreshold(); // threshold at 3 sigma noise
+
+ if(signal < threshold) continue;
+ //cout<<signal<<" "<<threshold<<endl;
+
+ digits[0] = k;
+ digits[1] = ix;
+ digits[2] = TMath::Nint(signal);
+ for(j1=0;j1<size;j1++)if(j1<pList->GetNEntries()){
+ // only three in digit.
+ tracks[j1] = pList->GetTrack(k,ix,j1);
+ hits[j1] = pList->GetHit(k,ix,j1);
+ }else{
+ tracks[j1] = -3;
+ hits[j1] = -1;
+ } // end for j1
+ // finally add digit
+ aliITS->AddSimDigit(2,0,digits,tracks,hits,charges);
+ } // end for ix
+ } // end for k
+ delete [] digits;
+ delete [] tracks;
+ delete [] hits;
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::WriteSDigits(AliITSpList *pList){
+ // Fills the Summable digits Tree
+ Int_t i,ni,j,nj;
+ static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
+
+ pList->GetMaxMapIndex(ni,nj);
+ for(i=0;i<ni;i++)for(j=0;j<nj;j++){
+ if(pList->GetSignalOnly(i,j)>0.0){
+ aliITS->AddSumDigit(*(pList->GetpListItem(i,j)));
+ if(GetDebug(4)) cout << "pListSSD: "<<*(pList->GetpListItem(i,j))
+ << endl;
+ } // end if
+ } // end for i,j
+ return;
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::FillMapFrompList(AliITSpList *pList){
+ // Fills fMap2A from the pList of Summable digits
+ Int_t k,ix;
-
-//____________________________________________________________________________
-
-Float_t AliITSsimulationSSD::F(Float_t x, Float_t s) {
- // Computes the integral of a gaussian at the mean valuse x with sigma s.
-
- //printf("SDD:F(%e,%e)\n",x,s);
- return 0.5*TMath::Erf(x * fPitch / s) ;
-}
-
+ for(k=0;k<2;k++)for(ix=0;ix<GetNStrips();ix++)
+ fMapA2->AddSignal(k,ix,pList->GetSignal(k,ix));
+ return;
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::Print(ostream *os){
+ //Standard output format for this class
+
+ //AliITSsimulation::Print(os);
+ *os << fIonE <<",";
+ *os << fDifConst[0] <<","<< fDifConst[1] <<",";
+ *os << fDriftVel[0] <<","<< fDriftVel[1];
+ //*os <<","; fDCS->Print(os);
+ //*os <<","; fMapA2->Print(os);
+}
//______________________________________________________________________
+void AliITSsimulationSSD::Read(istream *is){
+ // Standard output streaming function.
+
+ //AliITSsimulation::Read(is);
+ *is >> fIonE;
+ *is >> fDifConst[0] >> fDifConst[1];
+ *is >> fDriftVel[0] >> fDriftVel[1];
+ //fDCS->Read(is);
+ //fMapA2->Read(is);
+}
+//______________________________________________________________________
+ostream &operator<<(ostream &os,AliITSsimulationSSD &source){
+ // Standard output streaming function.
-Float_t AliITSsimulationSSD::Get2Strip(Int_t flag, Int_t iStrip, Float_t x, Float_t z){
- // Returns the relative space between two strips.
+ source.Print(&os);
+ return os;
+}
+//______________________________________________________________________
+istream &operator>>(istream &os,AliITSsimulationSSD &source){
+ // Standard output streaming function.
- // flag==1 for Pside, 0 for Nside
+ source.Read(&os);
+ return os;
+}
+//______________________________________________________________________
- Float_t stereoP, stereoN;
- fSegmentation->Angles(stereoP,stereoN);
-
- Float_t tanP=TMath::Tan(stereoP);
- Float_t tanN=TMath::Tan(stereoN);
-
- Float_t dx = fSegmentation->Dx();
- Float_t dz = fSegmentation->Dz();
- x += dx/2;
- z += dz/2;
-
- if (flag) return (x - z*tanP) / fPitch - iStrip; // from 0 to 1
- else return (x - tanN*(dz - z)) / fPitch - iStrip;
-}
-//____________________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff