+/**************************************************************************
+ * 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 <iostream.h>
+#include <stdlib.h>
+#include <Riostream.h>
#include <TObjArray.h>
+#include <TParticle.h>
#include <TRandom.h>
#include <TMath.h>
+#include <TH1.h>
#include "AliITSmodule.h"
-#include "AliITSMapA2.h"
-#include "AliITSsegmentationSSD.h"
+#include "AliITSMapA2.h"
+#include "AliITSpList.h"
#include "AliITSresponseSSD.h"
-#include "AliITSsimulationSSD.h"
-//#include "AliITSdictSSD.h"
+#include "AliITSsegmentationSSD.h"
#include "AliITSdcsSSD.h"
#include "AliITS.h"
+#include "AliITShit.h"
+#include "AliITSdigitSSD.h"
#include "AliRun.h"
-
+#include "AliITSgeom.h"
+#include "AliITSsimulationSSD.h"
+#include "AliITSTableSSD.h"
ClassImp(AliITSsimulationSSD);
////////////////////////////////////////////////////////////////////////
//
// AliITSsimulationSSD is the simulation of SSDs.
-//------------------------------------------------------------
+//----------------------------------------------------------------------
+AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(),
+fDCS(0),
+fMapA2(0),
+fIonE(0.0),
+fDifConst(),
+fDriftVel(){
+ //default Constructor
+ //Inputs:
+ // none.
+ // Outputs:
+ // none.
+ // Return:
+ // A default construction AliITSsimulationSSD class
+}
+//----------------------------------------------------------------------
AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg,
- AliITSresponse *resp){
- // Constructor
-
- fSegmentation = seg;
- fResponse = resp;
- Float_t noise[2] = {0.,0.};
- fResponse->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
- cout<<"nois1,2 ="<<noise[0]<<","<<noise[1]<<endl;
- fDCS = new AliITSdcsSSD(seg,resp);
-
- fNstrips = fSegmentation->Npx();
- fPitch = fSegmentation->Dpx(0);
- cout<<" Dx,Dz ="<<fSegmentation->Dx()<<","<<fSegmentation->Dz()<<endl;
- cout<<"fNstrips="<<fNstrips<<" fPitch="<<fPitch<<endl;
-
- //fP = new TArrayF(fNstrips+1);
- //fN = new TArrayF(fNstrips+1);
-
- fMapA2 = new AliITSMapA2(fSegmentation);
-
- //fTracksP = new AliITSdictSSD[fNstrips+1];
- //fTracksN = new AliITSdictSSD[fNstrips+1];
-
- fSteps = 100; // still hard-wired - set in SetDetParam and get it via
- // fDCS together with the others eventually
+ AliITSresponse *res):
+AliITSsimulation(seg,res),
+fDCS(0),
+fMapA2(0),
+fIonE(0.0),
+fDifConst(),
+fDriftVel(){
+ // Constructor
+ // Input:
+ // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used
+ // AliITSresponseSSD *resp Pointer to the SSD responce class to be used
+ // Outputs:
+ // none.
+ // Return
+ // A standard constructed AliITSsimulationSSD class
+
+ 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->fMapA2 = source.fMapA2;
- //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
+ // AliITSresponseSSD *resp Pointer to the SSD responce class to be used
+ // Outputs:
+ // none.
+ // Return
+ // none.
+
+ Double_t noise[2] = {0.,0.};
+ GetResp()->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
+ fDCS = new AliITSdcsSSD((AliITSsegmentationSSD*)GetSegmentationModel(),
+ (AliITSresponseSSD*)GetResponseModel());
+
+ 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(GetSegmentationModel());
+}
+//______________________________________________________________________
+AliITSsimulationSSD& AliITSsimulationSSD::operator=(
+ const AliITSsimulationSSD &s){
+ // Operator =
+
+ if(this==&s) return *this;
+
+ this->fDCS = new AliITSdcsSSD(*(s.fDCS));
+ this->fMapA2 = s.fMapA2;
+ this->fIonE = s.fIonE;
+ this->fDifConst[0] = s.fDifConst[0];
+ this->fDifConst[1] = s.fDifConst[1];
+ this->fDriftVel[0] = s.fDriftVel[0];
+ this->fDriftVel[1] = s.fDriftVel[1];
+ return *this;
}
-//_____________________________________________________________
-AliITSsimulationSSD::AliITSsimulationSSD(AliITSsimulationSSD &source){
+//______________________________________________________________________
+AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source):
+ AliITSsimulation(source){
// copy constructor
- *this = source;
+ *this = source;
}
-//____________________________________________________________________________
+//______________________________________________________________________
AliITSsimulationSSD::~AliITSsimulationSSD() {
- // destructor
- //if(fP) delete fP;
- //if(fN) delete fN;
- delete fMapA2;
- //if(fTracksP) delete [] fTracksP;
- //if(fTracksN) delete [] fTracksN;
- delete fDCS;
-}
-
-//_______________________________________________________________
-void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module,
- Int_t dummy) {
- // Digitizes hits for one SSD module
-
- TObjArray *hits = mod->GetHits();
- Int_t nhits = hits->GetEntriesFast();
- if (!nhits) return;
- //cout<<"!! module, nhits ="<<module<<","<<nhits<<endl; //b.b.
-
- 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 maxNdigits = 2*fNstrips;
- Float_t **pList = new Float_t* [maxNdigits];
- memset(pList,0,sizeof(Float_t*)*maxNdigits);
- Int_t indexRange[4] = {0,0,0,0};
- static Bool_t first=kTRUE;
- Int_t lasttrack = -2;
- Int_t idtrack = -2;
-
- 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 (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) {
- //cout<<"!! befor HitToDigit: hit ="<<i<<endl; //b.b.
- HitToDigit(module, x0, y0, z0, x1, y1, z1, de, indexRange, first);
-
- if (lasttrack != idtrack || i==(nhits-1)) {
- GetList(idtrack,pList,indexRange);
- first=kTRUE;
- }
- lasttrack=idtrack;
- }
- } // end loop over hits
-
- ApplyNoise();
- ApplyCoupling();
-
- ChargeToSignal(pList);
-
- fMapA2->ClearMap();
+ // destructor
+ delete fMapA2;
+ delete fDCS;
}
-
-//---------------------------------------------------------------
-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,
- Int_t *indexRange, Bool_t first) {
- // Turns hits in SSD module into one or more digits.
-
- AliITSsegmentationSSD *seg = new AliITSsegmentationSSD();
- // AliITSresponseSSD *res = new AliITSresponseSSD();
-
- Float_t tang[2] = {0.0,0.0};
- seg->Angles(tang[0], tang[1]); // stereo<< -> tan(stereo)~=stereo
- //fSegmentation->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;
- Double_t ionE = 3.62E-9; // ionization energy of Si (GeV)
- //ionE = (Double_t) res->GetIonE();
-
- Double_t sigma[2] = {0.,0.}; // standard deviation of the diffusion gaussian
-
- Double_t D[2] = {11.,30.}; // diffusion constant {h,e} (cm**2/sec)
- //D[0] = (Double_t) res->GetDiffusionConstantP();
- //D[1] = (Double_t) res->GetDiffusionConstantN();
-
- Double_t tdrift[2] = {0.,0.}; // time of drift
- Double_t vdrift[2] = {0.86E6,2.28E6}; // drift velocity (cm/sec)
- //vdrift[0] = (Double_t) res->GetDriftVelocityP();
- //vdrift[1] = (Double_t) res->GetDriftVelocityN();
-
- 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/ionE; // e-h pairs generated
-
- //cout<<"Dy ="<<seg->Dy()<<endl;
- //cout<<"numOfSteps ="<<numOfSteps<<endl;
- //cout<<"dex,dey,dez ="<<dex<<","<<dey<<","<<dez<<endl;
- //cout<<"y0,y1 ="<<y0<<","<<y1<<endl;
- for(Int_t j=0; j<numOfSteps; j++) { // stepping
- // cout<<"step number ="<<j<<endl;
- x = x0 + (j+0.5)*dex;
- y = y0 + (j+0.5)*dey;
- if ( y > (seg->Dy()/2 +10)*1.0E-4 ) {
- //if ( y > (seg->Dy()*1.0E-4/2) ) {
- //if ( y > (fSegmentation->Dy()*1.0E-4/2) ) {
- // check if particle is within the detector
- cout<<"AliITSsimulationSSD::HitToDigit: Warning: hit out of detector y0,y,dey,j ="<<y0<<","<<y<<","<<dey<<","<<j<<endl;
- return;
- };
- z = z0 + (j+0.5)*dez;
-
- // calculate drift time
- tdrift[0] = (y+(seg->Dy()*1.0E-4)/2) / vdrift[0]; // y is the minimum path
- tdrift[1] = ((seg->Dy()*1.0E-4)/2-y) / vdrift[1]; // y is the minimum path
- //tdrift[0] = (y+(fSegmentation->Dy()*1.0E-4)/2) / vdrift[0]; // y is the minimum path
- //tdrift[1] = ((fSegmentation->Dy()*1.0E-4)/2-y) / vdrift[1]; // y is the minimum path
-
- 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+(seg->Dx()*1.0E-4)/2) - (z+(seg->Dz()*1.0E-4)/2)*tang[k];
- //w = (x+(fSegmentation->Dx()*1.0E-4)/2) - (z+(fSegmentation->Dz()*1.0E-4)/2)*tang[k];
- //cout<<"k,x,z,w ="<<k<<","<<x<<","<<z<<","<<w<<endl;
- }
- else {
- w = (x+(seg->Dx()*1.0E-4)/2) + (z-(seg->Dz()*1.0E-4)/2)*tang[k];
- //w = (x+(fSegmentation->Dx()*1.0E-4)/2) + (z-(fSegmentation->Dz()*1.0E-4)/2)*tang[k];
- //cout<<"k,x,z,w ="<<k<<","<<x<<","<<z<<","<<w<<endl;
- }
- w = w / (fPitch*1.0E-4); // w is converted in units of pitch
-
- if((w<(-0.5)) || (w>(fNstrips-0.5))) {
- // this check rejects hits in regions not covered by strips
- // 0.5 takes into account boundaries
- if(k==0) cout<<"AliITSsimulationSSD::HitToDigit: Warning: no strip in this region of P side"<<endl;
- else cout<<"AliITSsimulationSSD::HitToDigit: Warning: no strip in this region of N side"<<endl;
- return;
- }
-
- // sigma is the standard deviation of the diffusion gaussian
-
- if(tdrift[k]<0) return;
-
- sigma[k] = TMath::Sqrt(2*D[k]*tdrift[k]);
- sigma[k] = sigma[k] /(fPitch*1.0E-4); //units of Pitch
- if(sigma[k]==0.0) {
- cout<<"AliITSsimulationSSD::DigitiseModule: Error: sigma=0"<<endl;
- exit(0);
- }
-
- 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],
- indexRange, first);
- } // end for loop over side (0=Pside, 1=Nside)
- } // end stepping
- delete seg;
+//______________________________________________________________________
+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);
-void AliITSsimulationSSD::ApplyNoise() {
- // Apply Noise.
-
- Float_t signal;
- Float_t noise[2] = {0.,0.};
- fResponse->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
+ fpList->ClearMap();
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) {
+ // Produces Summable/Analog digits and writes them to the SDigit tree.
- for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
- for(Int_t ix=0;ix<fNstrips;ix++){ // loop over strips
- signal = (Float_t) fMapA2->GetSignal(k,ix);// retrieves signal from map
+ HitsToAnalogDigits(mod,fpList);
- signal += gRandom->Gaus(0,noise[k]); // add noise to signal
- if(signal<0.) signal=0.0; // in case noise is negative...
+ WriteSDigits(fpList);
- fMapA2->SetHit(k,ix,(Double_t)signal); // give back signal to map
- } // loop over strip
- } // loop over k (P or N side)
+ 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);
-void AliITSsimulationSSD::ApplyCoupling() {
- // Apply the effect of electronic coupling between channels
- Float_t signal, signalLeft=0, signalRight=0;
-
- for(Int_t ix=0;ix<fNstrips;ix++){
- if(ix>0.) signalLeft = (Float_t) fMapA2->GetSignal(0,ix-1)*fDCS->GetCouplingPL();
- else signalLeft = 0.0;
- if(ix<(fNstrips-1)) signalRight = (Float_t) fMapA2->GetSignal(0,ix+1)*fDCS->GetCouplingPR();
- else signalRight = 0.0;
- signal = (Float_t) fMapA2->GetSignal(0,ix);
- signal += signalLeft + signalRight;
- fMapA2->SetHit(0,ix,(Double_t)signal);
-
- if(ix>0.) signalLeft = (Float_t) fMapA2->GetSignal(1,ix-1)*fDCS->GetCouplingNL();
- else signalLeft = 0.0;
- if(ix<(fNstrips-1)) signalRight = (Float_t) fMapA2->GetSignal(1,ix+1)*fDCS->GetCouplingNR();
- else signalRight = 0.0;
- signal = (Float_t) fMapA2->GetSignal(1,ix);
- signal += signalLeft + signalRight;
- fMapA2->SetHit(1,ix,(Double_t)signal);
- } // loop over strips
+ ChargeToSignal(pList);
}
-
-//____________________________________________________________________________
+//______________________________________________________________________
+void AliITSsimulationSSD::HitsToAnalogDigits(AliITSmodule *mod,
+ AliITSpList *pList){
+ // Loops over all hits to produce Analog/floating point digits. This
+ // is also the first task in producing standard digits.
+ Int_t lasttrack = -2;
+ Int_t idtrack = -2;
+ Double_t x0=0.0, y0=0.0, z0=0.0;
+ Double_t x1=0.0, y1=0.0, z1=0.0;
+ Double_t de=0.0;
+ Int_t module = mod->GetIndex();
+
+ TObjArray *hits = mod->GetHits();
+ Int_t nhits = hits->GetEntriesFast();
+ if (nhits<=0) return;
+ AliITSTableSSD * tav = new AliITSTableSSD(GetNStrips());
+ module = mod->GetIndex();
+ if ( mod->GetLayer() == 6 ) GetSegmentation()->SetLayer(6);
+ if ( mod->GetLayer() == 5 ) GetSegmentation()->SetLayer(5);
+ for(Int_t i=0; 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;
+}
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0,
+ Double_t z0, Double_t x1, Double_t y1,
+ Double_t z1, Double_t de,
+ AliITSTableSSD *tav) {
+ // Turns hits in SSD module into one or more digits.
+ Float_t tang[2] = {0.0,0.0};
+ GetSegmentation()->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo
+ Double_t x, y, z;
+ Double_t dex=0.0, dey=0.0, dez=0.0;
+ Double_t pairs; // pair generation energy per step.
+ Double_t sigma[2] = {0.,0.};// standard deviation of the diffusion gaussian
+ Double_t tdrift[2] = {0.,0.}; // time of drift
+ Double_t w;
+ Double_t inf[2], sup[2], par0[2];
+
+ // Steps in the module are determined "manually" (i.e. No Geant)
+ // NumOfSteps divide path between entering and exiting hits in steps
+ Int_t numOfSteps = NumOfSteps(x1, y1, z1, dex, dey, dez);
+ // Enery loss is equally distributed among steps
+ de = de/numOfSteps;
+ pairs = de/GetIonizeE(); // e-h pairs generated
+ for(Int_t j=0; j<numOfSteps; j++) { // stepping
+ x = x0 + (j+0.5)*dex;
+ y = y0 + (j+0.5)*dey;
+ if ( y > (GetSegmentation()->Dy()/2+10)*1.0E-4 ) {
+ // check if particle is within the detector
+ Warning("HitToDigit",
+ "hit out of detector y0=%e,y=%e,dey=%e,j =%e module=%d",
+ y0,y,dey,j,module);
+ return;
+ } // end if
+ z = z0 + (j+0.5)*dez;
+ if(GetDebug(4)) cout <<"HitToDigit "<<x<<" "<<y<<" "<<z<< " "
+ <<dex<<" "<<dey<<" "<<dez<<endl;
+ // calculate drift time
+ // y is the minimum path
+ tdrift[0] = (y+(GetSegmentation()->Dy()*1.0E-4)/2)/GetDriftVelocity(0);
+ tdrift[1] = ((GetSegmentation()->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1);
+
+ for(Int_t k=0; k<2; k++) { // both sides remember: 0=Pside 1=Nside
+
+ tang[k]=TMath::Tan(tang[k]);
+
+ // w is the coord. perpendicular to the strips
+ /*
+ if(k==0) {
+ w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) -
+ (z+(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
+ }else{
+ w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) +
+ (z-(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
+ } // end if
+ w /= (GetStripPitch()*1.0E-4); //w is converted in units of pitch
+ */
+ { // replacement block for the above.
+ Float_t xp=x*1.e+4,zp=z*1.e+4; // microns
+ GetSegmentation()->GetPadTxz(xp,zp);
+ if(k==0) w = xp; // P side strip number
+ else w = zp; // N side strip number
+ } // end test block
+
+ if((w<(-0.5)) || (w>(GetNStrips()-0.5))) {
+ // this check rejects hits in regions not covered by strips
+ // 0.5 takes into account boundaries
+ 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
+}
+//______________________________________________________________________
+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;
+
+ GetResp()->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)
+}
+//______________________________________________________________________
+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
+}
+//______________________________________________________________________
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;
+ // 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;
-}
-
-//_________________________________________________________________________
+ 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,
- Int_t *indexRange, Bool_t first) {
- // 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 signal = 0.0, 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); // clostest 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;
- }
-
- 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
- signal = fMapA2->GetSignal(k,strip);
- signal += dXCharge1;
-
- fMapA2->SetHit(k,strip,(Double_t)signal);
- if(((Int_t) strip) < (fNstrips-1)) {
- // strip doesn't have to be the last (remind: last=fNstrips-1)
- // otherwise part of the charge is lost
- signal = fMapA2->GetSignal(k,(strip+1));
- signal += dXCharge2;
- fMapA2->SetHit(k,(strip+1),(Double_t)signal);
- }
-
- if(dXCharge1 > 1.) {
- if (first) {
- indexRange[k*2+0]=indexRange[k*2+1]=(Int_t) strip;
- first=kFALSE;
- }
-
- indexRange[k*2+0]=TMath::Min(indexRange[k*2+0],(Int_t) strip);
- indexRange[k*2+1]=TMath::Max(indexRange[k*2+1],(Int_t) strip);
- } // dXCharge > 1 e-
-
- }
- 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;
- }
-
- 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
- signal = fMapA2->GetSignal(k,strip);
- signal += dXCharge1;
- fMapA2->SetHit(k,strip,(Double_t)signal);
- if(((Int_t) strip) > 0) {
- // strip doesn't have to be the first
- // otherwise part of the charge is lost
- signal = fMapA2->GetSignal(k,(strip-1));
- signal += dXCharge2;
- fMapA2->SetHit(k,(strip-1),(Double_t)signal);
- }
-
- if(dXCharge1 > 1.) {
- if (first) {
- indexRange[k*2+0]=indexRange[k*2+1]=(Int_t) strip;
- first=kFALSE;
- }
-
- indexRange[k*2+0]=TMath::Min(indexRange[k*2+0],(Int_t) strip);
- indexRange[k*2+1]=TMath::Max(indexRange[k*2+1],(Int_t) strip);
- } // dXCharge > 1 e-
- }
+ 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
-
- // we could condition the stepping depending on the incident angle
- // of the track
- dex = x/numOfSteps;
- dey = y/numOfSteps;
- dez = z/numOfSteps;
-
- return numOfSteps;
-
+ 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
+
+ // 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,Float_t **pList,Int_t *indexRange) {
- // loop over nonzero digits
- Int_t ix,globalIndex;
- Float_t signal=0.;
- Float_t highest,middle,lowest;
- // printf("SPD-GetList: indexRange[0] indexRange[1] indexRange[2] indexRange[3] %d %d %d %d\n",indexRange[0], indexRange[1], indexRange[2], indexRange[3]);
-
- for(Int_t k=0; k<2; k++) {
- for(ix=indexRange[k*2+0];ix<indexRange[k*2+1]+1;ix++){
- if(indexRange[k*2+0]<indexRange[k*2+1])
- signal=fMapA2->GetSignal(k,ix);
-
- globalIndex = k*fNstrips+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 -1
-
- *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
-
- if (signal>highest){
- *(pList[globalIndex]+5) = middle;
- *(pList[globalIndex]+4) = highest;
- *(pList[globalIndex]+3) = signal;
-
- *(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;
-
- *(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
+//----------------------------------------------------------------------
+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(Float_t **pList) {
- // charge to signal
-
- AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
-
- Float_t threshold = 0.;
-
- Int_t digits[3], tracks[3],hits[3],gi,j1;
- Float_t charges[3];
- Float_t signal,phys;
- Float_t noise[2] = {0.,0.};
- fResponse->GetNoiseParam(noise[0],noise[1]);
-
- for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
-
- // Threshold for zero-suppression
- // It can be defined in AliITSresponseSSD
- // threshold = (Float_t)fResponse->MinVal(k);
- // I prefer to think adjusting the threshold "manually", looking
- // at the scope, and considering noise standard deviation
- threshold = 4.0*noise[k]; // 4 times noise is a choice
- //cout<<"SSD: k,thresh ="<<k<<","<<threshold<<endl;
- for(Int_t ix=0;ix<fNstrips;ix++){ // loop over strips
-
- signal = (Float_t) fMapA2->GetSignal(k,ix);
-
- gi =k*fNstrips+ix; // global index
- if (signal > threshold) {
- digits[0]=k;
- digits[1]=ix;
-
- // convert to ADC signal
- // conversion factor are rather arbitrary (need tuning)
- // minimum ionizing particle --> ~30000 pairs --> ADC channel 50
- signal = signal*50.0/30000.0;
- //cout<<"SSD: 1 signal ="<<signal<<endl;
- if(signal>1000.) signal = 1000.0; // if exceeding, accumulate last one
- //cout<<"SSD: 2 signal ="<<signal<<endl;
- digits[2]=(Int_t) signal;
-
- //gi =k*fNstrips+ix; // global index
- for(j1=0;j1<3;j1++){
- if (pList[gi]) {
- tracks[j1] = (Int_t)(*(pList[gi]+j1));
- }
- else {
- tracks[j1]=-2; //noise
- }
- charges[j1] = 0;
- }
-
- phys=0;
-
- hits[0]=0;
- hits[1]=0;
- hits[2]=0;
- aliITS->AddSimDigit(2,phys,digits,tracks,hits,charges); // finally add digit
-
- //if(pList[gi]) delete [] pList[gi];
- }
- if(pList[gi]) delete [] pList[gi];
- }
- }
- delete [] pList;
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::ChargeToSignal(AliITSpList *pList) {
+ // charge to signal
+ static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
+ Float_t threshold = 0.;
+ Int_t size = AliITSdigitSSD::GetNTracks();
+ Int_t * digits = new Int_t[size];
+ Int_t * tracks = new Int_t[size];
+ Int_t * hits = new Int_t[size];
+ Int_t j1;
+ Float_t charges[3] = {0.0,0.0,0.0};
+ Float_t signal;
+ Double_t noise[2] = {0.,0.};
+
+ GetResp()->GetNoiseParam(noise[0],noise[1]);
+
+ for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside)
+ // Threshold for zero-suppression
+ // It can be defined in AliITSresponseSSD
+ // threshold = (Float_t)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 = GetResp()->DEvToADC(
+ fMapA2->GetSignal(k,ix));
+ if(signal>1024.) signal = 1024.;//if exceeding, accumulate last one
+ digits[0] = k;
+ digits[1] = ix;
+ digits[2] = (Int_t) signal;
+ for(j1=0;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
+ } // 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;
+
+ 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.
+ source.Print(&os);
+ return os;
+}
+//______________________________________________________________________
+istream &operator>>(istream &os,AliITSsimulationSSD &source){
+ // Standard output streaming function.
-
-
-
-
-
-
-
+ source.Read(&os);
+ return os;
+}
+//______________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff