#include <stdlib.h>
#include <Riostream.h>
#include <TObjArray.h>
+#include <TRandom.h>
+
#include "AliITSmodule.h"
#include "AliITSMapA2.h"
#include "AliITSpList.h"
#include "AliITSCalibrationSSD.h"
#include "AliITSsegmentationSSD.h"
-#include "AliITSdcsSSD.h"
+//#include "AliITSdcsSSD.h"
#include "AliITS.h"
#include "AliITShit.h"
#include "AliITSdigitSSD.h"
#include "AliITSgeom.h"
#include "AliITSsimulationSSD.h"
#include "AliITSTableSSD.h"
-#include "AliITSresponseSSD.h"
+#include <TF1.h>
+#include "AliMathBase.h"
ClassImp(AliITSsimulationSSD)
////////////////////////////////////////////////////////////////////////
-// Version: 0 //
-// Written by Enrico Fragiacomo //
-// July 2000 //
// //
-// AliITSsimulationSSD is the simulation of SSDs. //
+// Author: Enrico Fragiacomo //
+// enrico.fragiacomo@ts.infn.it //
+// Last revised: june 2008 //
+// //
+// AliITSsimulationSSD is the simulation of SSD. //
////////////////////////////////////////////////////////////////////////
//----------------------------------------------------------------------
AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(),
-fDCS(0),
+ //fDCS(0),
fMapA2(0),
fIonE(0.0),
fDifConst(),
-fDriftVel(){
+fDriftVel(),
+fTimeResponse(NULL){
//default Constructor
//Inputs:
// none.
//----------------------------------------------------------------------
AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp):
AliITSsimulation(dettyp),
-fDCS(0),
+//fDCS(0),
fMapA2(0),
fIonE(0.0),
fDifConst(),
-fDriftVel(){
+fDriftVel(),
+fTimeResponse(NULL){
// Constructor
// Input:
- // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used
- // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used
+ // 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();
}
//----------------------------------------------------------------------
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.
- AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSSD());
+ // 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);
- Double_t noise[2] = {0.,0.};
- res->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
- fDCS = new AliITSdcsSSD(seg,res);
-
- 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);
+
+ SetDriftVelocity(); // use default values in .h file
+ SetIonizeE(); // use default values in .h file
+ SetDiffConst(); // use default values in .h file
+ fpList = new AliITSpList(2,GetNStrips());
+ fMapA2 = new AliITSMapA2(seg);
}
//______________________________________________________________________
AliITSsimulationSSD& AliITSsimulationSSD::operator=(
if(this==&s) return *this;
- this->fDCS = new AliITSdcsSSD(*(s.fDCS));
+ // this->fDCS = new AliITSdcsSSD(*(s.fDCS));
this->fMapA2 = s.fMapA2;
this->fIonE = s.fIonE;
this->fDifConst[0] = s.fDifConst[0];
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){
return *this;
}
+*/
//______________________________________________________________________
AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source):
- AliITSsimulation(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() {
// destructor
delete fMapA2;
- delete fDCS;
+ delete fTimeResponse;
+ //delete fDCS;
}
//______________________________________________________________________
void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){
// Return:
// none.
- FillMapFrompList(fpList); // need to check if needed here or not????
- SDigitToDigit(fModule,fpList);
- fpList->ClearMap();
- fMapA2->ClearMap();
+ FillMapFrompList(fpList); // need to check if needed here or not????
+ SDigitToDigit(fModule,fpList);
+ fpList->ClearMap();
+ fMapA2->ClearMap();
}
//______________________________________________________________________
void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) {
// Digitizes hits for one SSD module
SetModuleNumber(mod->GetIndex());
-
+
HitsToAnalogDigits(mod,fpList);
SDigitToDigit(GetModuleNumber(),fpList);
-
+
fpList->ClearMap();
fMapA2->ClearMap();
}
HitsToAnalogDigits(mod,fpList);
WriteSDigits(fpList);
-
+
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);
}
//______________________________________________________________________
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();
-
- 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)) {
- 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;
+ 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
- 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 =%e module=%d",
- y0,y,dey,j,module);
- return;
- } // end if
- z = z0 + (j+0.5)*dez;
- if(GetDebug(4)) cout <<"HitToDigit "<<x<<" "<<y<<" "<<z<< " "
- <<dex<<" "<<dey<<" "<<dez<<endl;
- // calculate drift time
- // y is the minimum path
- tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0);
- tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1);
-
- for(Int_t k=0; k<2; k++) { // both sides remember: 0=Pside 1=Nside
-
- tang[k]=TMath::Tan(tang[k]);
-
- // w is the coord. perpendicular to the strips
- /*
- if(k==0) {
- w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) -
- (z+(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
- }else{
- w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) +
- (z-(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
- } // end if
- w /= (GetStripPitch()*1.0E-4); //w is converted in units of pitch
- */
- { // replacement block for the above.
- Float_t xp=x*1.e+4,zp=z*1.e+4; // microns
- seg->GetPadTxz(xp,zp);
- if(k==0) w = xp; // P side strip number
- else w = zp; // N side strip number
- } // end test block
-
- if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
- // this check rejects hits in regions not covered by strips
- // 0.5 takes into account boundaries
- if(GetDebug(4)) cout << "x,z="<<x<<","<<z<<" w="<<w
- <<" Nstrips="<<GetNStrips()<<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 for loop over side (0=Pside, 1=Nside)
- } // end stepping
+ // 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!!!
+ }
+
+ // 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;
+
+ // calculate drift time
+ // y is the minimum path
+ tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0);
+
+ w = xp; // P side strip number
+
+ if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
+ // this check rejects hits in regions not covered by strips
+ // 0.5 takes into account boundaries
+ if(GetDebug(4)) cout << "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 Pside
+ //-------------------------------------------------------
+
+ //------------------------------------------------------
+ // Nside
+ //-------------------------------------------------------
+ k=1;
+ tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1);
+
+ //tang[k]=TMath::Tan(tang[k]);
+
+ w = zp; // N side strip number
+
+ if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
+ // this check rejects hits in regions not covered by strips
+ // 0.5 takes into account boundaries
+ if(GetDebug(4)) cout << "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
}
+
//______________________________________________________________________
void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){
- // Apply Noise.
- Int_t k,ix;
- Double_t signal,noise;
- Double_t noiseP[2] = {0.,0.};
- Double_t a,b;
- AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module);
- res->GetNoiseParam(a,b); // retrieves noise parameters
- noiseP[0] = a; noiseP[1] = b;
- for(k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
- for(ix=0;ix<GetNStrips();ix++){ // loop over strips
- noise = gRandom->Gaus(0,noiseP[k]);// get noise to signal
- signal = noise + fMapA2->GetSignal(k,ix);//get signal from map
- if(signal<0.) signal=0.0; // in case noise is negative...
- fMapA2->SetHit(k,ix,signal); // give back signal to map
- if(signal>0.0) pList->AddNoise(k,ix,module,noise);
- } // loop over strip
- } // loop over k (P or N side)
+ // Apply Noise.
+ 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(AliITSpList *pList,Int_t module) {
- // Apply the effect of electronic coupling between channels
- Int_t ix;
- Double_t signalLeft=0, signalRight=0,signal=0;
-
- for(ix=0;ix<GetNStrips();ix++){
- // P side coupling
- if(ix>0.)signalLeft = fMapA2->GetSignal(0,ix-1)*fDCS->GetCouplingPL();
- else signalLeft = 0.0;
- if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(0,ix+1)*
- fDCS->GetCouplingPR();
- else signalRight = 0.0;
- signal = signalLeft + signalRight;
- fMapA2->AddSignal(0,ix,signal);
- if(signal>0.0) pList->AddNoise(0,ix,module,signal);
-
- signalLeft = signalRight = signal = 0.0;
- // N side coupling
- if(ix>0.) signalLeft = fMapA2->GetSignal(1,ix-1)*fDCS->GetCouplingNL();
- else signalLeft = 0.0;
- if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(1,ix+1)*
- fDCS->GetCouplingNR();
- else signalRight = 0.0;
- signal = signalLeft + signalRight;
- fMapA2->AddSignal(1,ix,signal);
- if(signal>0.0) pList->AddNoise(1,ix,module,signal);
- } // loop over strips
+ // 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::ApplyDeadChannels(Int_t module) {
+ // Kill dead channels setting gain to zero
+
+ AliITSCalibrationSSD* res = (AliITSCalibrationSSD*)GetCalibrationModel(module);
+
+ for(Int_t i=0;i<GetNStrips();i++){
+
+ if(res->IsPChannelBad(i)) res->SetGainP(i,0.0);
+ if(res->IsNChannelBad(i)) res->SetGainN(i,0.0);
+
+ } // loop over strips
+
+}
+
//______________________________________________________________________
Float_t AliITSsimulationSSD::F(Float_t av, Float_t x, Float_t s) {
// Computes the integral of a gaussian using Error Function
Float_t sigm2 = sqrt2*s;
Float_t integral;
- integral = 0.5 * TMath::Erf( (x - av) / sigm2);
+ integral = 0.5 * AliMathBase::ErfFast( (x - av) / sigm2);
return integral;
}
//______________________________________________________________________
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
Int_t j1;
Float_t charges[3] = {0.0,0.0,0.0};
Float_t signal;
- Double_t noise[2] = {0.,0.};
AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module);
- res->GetNoiseParam(noise[0],noise[1]);
+ AliITSSimuParam* simpar = fDetType->GetSimuParam();
for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
- // Threshold for zero-suppression
- // It can be defined in AliITSCalibrationSSD
- // threshold = (Float_t)GetResp()->MinVal(k);
- // I prefer to think adjusting the threshold "manually", looking
- // at the scope, and considering noise standard deviation
- threshold = 4.0*noise[k]; // 4 times noise is a choice
- for(Int_t ix=0;ix<GetNStrips();ix++){ // loop over strips
- if(fMapA2->GetSignal(k,ix) <= threshold)continue;
- // convert to ADC signal
- signal = res->GetDEvToADC(
- fMapA2->GetSignal(k,ix));
- if(signal>1024.) signal = 1024.;//if exceeding, accumulate last one
- digits[0] = k;
- digits[1] = ix;
- digits[2] = (Int_t) signal;
- for(j1=0;j1<size;j1++)if(j1<pList->GetNEnteries()){
- // 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
+ 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;
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff