+/**************************************************************************
+ * 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 <iostream.h>
+#include <iomanip.h>
#include <TObjArray.h>
#include <TRandom.h>
#include <TMath.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 "AliRun.h"
#include "AliITSgeom.h"
+#include "AliITSsimulationSSD.h"
ClassImp(AliITSsimulationSSD);
////////////////////////////////////////////////////////////////////////
//
// AliITSsimulationSSD is the simulation of SSDs.
+//----------------------------------------------------------------------
+AliITSsimulationSSD::AliITSsimulationSSD(){
+ //default Constructor
+
+ fDCS = 0;
+ fDifConst[0] = fDifConst[1] = 0.0;
+ fDriftVel[0] = fDriftVel[1] = 0.0;
+ fMapA2 = 0;
+}
//----------------------------------------------------------------------
AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg,
AliITSresponse *resp){
// Constructor
- fSegmentation = seg;
- fResponse = resp;
+ fDCS = 0;
+ fDifConst[0] = fDifConst[1] = 0.0;
+ fDriftVel[0] = fDriftVel[1] = 0.0;
+ fMapA2 = 0;
+ Init((AliITSsegmentationSSD*)seg,(AliITSresponseSSD*)resp);
+}
+//----------------------------------------------------------------------
+void AliITSsimulationSSD::Init(AliITSsegmentationSSD *seg,
+ AliITSresponseSSD *resp){
+ // Constructor
+
+ fSegmentation = seg;
+ fResponse = resp;
Float_t noise[2] = {0.,0.};
fResponse->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
- fDCS = new AliITSdcsSSD(seg,resp);
-
- fNstrips = fSegmentation->Npx();
- fPitch = fSegmentation->Dpx(0);
- fMapA2 = new AliITSMapA2(fSegmentation);
-
- fSteps = 100; // still hard-wired - set in SetDetParam and get it via
- // fDCS together with the others eventually
+ fDCS = new AliITSdcsSSD(seg,resp);
+
+ SetDriftVelocity(); // use default values in .h file
+ SetIonizeE(); // use default values in .h file
+ SetDiffConst(); // use default values in .h file
+ fMapA2 = new AliITSMapA2(fSegmentation);
}
//______________________________________________________________________
-AliITSsimulationSSD& AliITSsimulationSSD::operator=(AliITSsimulationSSD
- &source){
+AliITSsimulationSSD& AliITSsimulationSSD::operator=(
+ const AliITSsimulationSSD &s){
// Operator =
- if(this==&source) return *this;
+ if(this==&s) return *this;
- this->fDCS = new AliITSdcsSSD(*(source.fDCS));
- this->fMapA2 = source.fMapA2;
- this->fNstrips = source.fNstrips;
- this->fPitch = source.fPitch;
- this->fSteps = source.fSteps;
+ 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){
// copy constructor
*this = source;
delete fMapA2;
delete fDCS;
}
-//_______________________________________________________________-------
-void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module,
- Int_t dummy) {
- // Digitizes hits for one SSD module
-
- Int_t lay, lad, detect;
- AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
- AliITSgeom *geom = aliITS->GetITSgeom();
- geom->GetModuleId(module,lay, lad, detect);
- if ( lay == 6 )((AliITSsegmentationSSD*)fSegmentation)->SetLayer(6);
- if ( lay == 5 )((AliITSsegmentationSSD*)fSegmentation)->SetLayer(5);
+//______________________________________________________________________
+void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,
+ Int_t dummy0,Int_t dummy1) {
+ // Digitizes hits for one SSD module
+ Int_t module = mod->GetIndex();
+ AliITSpList *pList = new AliITSpList(2,GetNStrips());
- TObjArray *hits = mod->GetHits();
- Int_t nhits = hits->GetEntriesFast();
- if (!nhits) return;
- //cout<<"!! module, nhits ="<<module<<","<<nhits<<endl;
-
+ HitsToAnalogDigits(mod,pList);
+ SDigitToDigit(module,pList);
+
+ delete pList;
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t dummy0,
+ Int_t dummy1) {
+ // Produces Summable/Analog digits and writes them to the SDigit tree.
+ AliITSpList *pList = new AliITSpList(2,GetNStrips());
+
+ HitsToAnalogDigits(mod,pList);
+
+ WriteSDigits(pList);
+
+ delete pList;
+ fMapA2->ClearMap();
+}
+//______________________________________________________________________
+void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){
+ // Takes the pList and finishes the digitization.
+
+// FillMapFrompList(pList); //commented out to avoid double counting of the
+ //charge
+
+ ApplyNoise(pList,module);
+ ApplyCoupling(pList,module);
+
+ 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 indexRange[4] = {0,0,0,0};
+ static Bool_t first = kTRUE;
+ 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 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;
-
+ Int_t module = mod->GetIndex();
+
+ TObjArray *hits = mod->GetHits();
+ Int_t nhits = hits->GetEntriesFast();
+ if (nhits<=0) return;
+
+ 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
HitToDigit(module, x0, y0, z0, x1, y1, z1, de, indexRange, first);
if (lasttrack != idtrack || i==(nhits-1)) {
- GetList(idtrack,pList,indexRange);
+ GetList(idtrack,i,module,pList,indexRange);
first=kTRUE;
} // end if
lasttrack=idtrack;
} // end if
} // end loop over hits
-
- ApplyNoise();
- ApplyCoupling();
-
- ChargeToSignal(pList);
-
- fMapA2->ClearMap();
+ return;
}
//----------------------------------------------------------------------
void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0,
// Turns hits in SSD module into one or more digits.
Float_t tang[2] = {0.0,0.0};
- fSegmentation->Angles(tang[0], tang[1]);// stereo<< -> tan(stereo)~=stereo
+ 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;
- Double_t ionE = 3.62E-9; // ionization energy of Si (GeV)
-
+ Double_t pairs; // pair generation energy per step.
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)
Double_t tdrift[2] = {0.,0.}; // time of drift
- Double_t vdrift[2] = {0.86E6,2.28E6}; // drift velocity (cm/sec)
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
+ de = de/numOfSteps;
+ pairs = de/GetIonizeE(); // e-h pairs generated
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 > (fSegmentation->Dy()/2+10)*1.0E-4 ) {
+ if ( y > (GetSegmentation()->Dy()/2+10)*1.0E-4 ) {
// check if particle is within the detector
- cout<<"AliITSsimulationSSD::HitToDigit: Warning: hit "
- "out of detector y0,y,dey,j ="
- <<y0<<","<<y<<","<<dey<<","<<j<<endl;
+ Warning("HitToDigit","hit out of detector y0=%e,y=%e,dey=%e,j =%e",
+ y0,y,dey,j);
return;
} // end if
z = z0 + (j+0.5)*dez;
// calculate drift time
// y is the minimum path
- tdrift[0] = (y+(fSegmentation->Dy()*1.0E-4)/2) / vdrift[0];
- tdrift[1] = ((fSegmentation->Dy()*1.0E-4)/2-y) / vdrift[1];
+ 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
// 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];
+ w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) -
+ (z+(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
}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 = (x+(GetSegmentation()->Dx()*1.0E-4)/2) +
+ (z-(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k];
} // end if
- w = w / (fPitch*1.0E-4); // w is converted in units of pitch
+ w /= (GetStripPitch()*1.0E-4); // w is converted in units of pitch
- if((w<(-0.5)) || (w>(fNstrips-0.5))) {
+ 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(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; // There are dead region on the SSD sensitive volume.
+ /*
+ if(k==0) Warning("HitToDigit",
+ "no strip in this region of P side");
+ else Warning"HitToDigit","no strip in this region of N side");
return;
+ */
} // end if
// 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
+ sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]);
+ sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch
if(sigma[k]==0.0) {
- cout<<"AliITSsimulationSSD::DigitiseModule: Error: sigma=0"
- <<endl;
+ Error("HitToDigit"," sigma[%d]=0",k);
exit(0);
} // end if
} // end stepping
//delete seg;
}
-//____________________________________________________________________--
-void AliITSsimulationSSD::ApplyNoise() {
+//______________________________________________________________________
+void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){
// Apply Noise.
-
- Float_t signal;
- Float_t noise[2] = {0.,0.};
- fResponse->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters
-
- 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
-
- signal += gRandom->Gaus(0,noise[k]);// add noise to signal
+ Int_t k,ix;
+ Double_t signal,noise;
+ Double_t noiseP[2] = {0.,0.};
+ Float_t a,b;
+
+ fResponse->GetNoiseParam(a,b); // retrieves noise parameters
+ noiseP[0] = (Double_t) a; noiseP[1] = (Double_t) 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,(Double_t)signal); // give back signal to map
+ 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() {
+void AliITSsimulationSSD::ApplyCoupling(AliITSpList *pList,Int_t module) {
// Apply the effect of electronic coupling between channels
- Float_t signal, signalLeft=0, signalRight=0;
+ Int_t ix;
+ Double_t signalLeft=0, signalRight=0,signal=0;
- for(Int_t ix=0;ix<fNstrips;ix++){
- if(ix>0.) signalLeft = (Float_t) fMapA2->GetSignal(0,ix-1)*
- fDCS->GetCouplingPL();
+ 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<(fNstrips-1)) signalRight = (Float_t) fMapA2->GetSignal(0,ix+1)*
+ if(ix<(GetNStrips()-1)) signalRight = 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();
+ 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<(fNstrips-1)) signalRight = (Float_t) fMapA2->GetSignal(1,ix+1)*
+ if(ix<(GetNStrips()-1)) signalRight = 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);
+ signal = signalLeft + signalRight;
+ fMapA2->AddSignal(1,ix,signal);
+ if(signal>0.0) pList->AddNoise(1,ix,module,signal);
} // loop over strips
}
//______________________________________________________________________
// 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;
+ 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
// 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)
+ fMapA2->AddSignal(k,(Int_t)strip,dXCharge1);
+ 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
- signal = fMapA2->GetSignal(k,(strip+1));
- signal += dXCharge2;
- fMapA2->SetHit(k,(strip+1),(Double_t)signal);
+ fMapA2->AddSignal(k,((Int_t)strip+1),dXCharge2);
} // end if
if(dXCharge1 > 1.) {
if (first) {
- indexRange[k*2+0]=indexRange[k*2+1]=(Int_t) strip;
+ indexRange[k*2+0] = indexRange[k*2+1]=(Int_t) strip;
first=kFALSE;
} // end if first
// 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);
+ fMapA2->AddSignal(k,(Int_t)strip,dXCharge1);
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);
+ fMapA2->AddSignal(k,((Int_t)strip-1),dXCharge2);
} // end if
if(dXCharge1 > 1.) {
return numOfSteps;
}
//----------------------------------------------------------------------
-void AliITSsimulationSSD::GetList(Int_t label,Float_t **pList,
- Int_t *indexRange) {
+void AliITSsimulationSSD::GetList(Int_t label,Int_t hit,Int_t mod,
+ AliITSpList *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]);
+ Int_t ix,i;
+ Double_t signal=0.;
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{
+// if(indexRange[k*2+0]<indexRange[k*2+1])
+ signal = fMapA2->GetSignal(k,ix);
+ if(signal==0.0) continue;
// check the signal magnitude
- highest = *(pList[globalIndex]+3);
- middle = *(pList[globalIndex]+4);
- lowest = *(pList[globalIndex]+5);
- signal -= (highest+middle+lowest);
- //
+ for(i=0;i<pList->GetNSignals(k,ix);i++)
+ signal -= pList->GetTSignal(k,ix,i);
// 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 if
- } // end if
+ pList->AddSignal(k,ix,label,hit,mod,signal);
} // end of loop pixels in x
} // end of loop over pixels in z
}
//----------------------------------------------------------------------
-void AliITSsimulationSSD::ChargeToSignal(Float_t **pList) {
+void AliITSsimulationSSD::ChargeToSignal(AliITSpList *pList) {
// charge to signal
- AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
+ static 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;
+ Int_t digits[3], tracks[3],hits[3],j1;
+ Float_t charges[3] = {0.0,0.0,0.0};
+ Float_t signal;
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)
+ ((AliITSresponseSSD*)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
- 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;
- if(signal>1000.) signal = 1000.0;//if exceeding, accumulate
- // last one
- 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
- } // end if pList
- charges[j1] = 0;
- } // end for j1
-
- phys=0;
-
- hits[0]=0;
- hits[1]=0;
- hits[2]=0;
- // finally add digit
- aliITS->AddSimDigit(2,phys,digits,tracks,hits,charges);
-
- //if(pList[gi]) delete [] pList[gi];
- } // end if signal > threshold
- if(pList[gi]) delete [] pList[gi];
+ 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 = ((AliITSresponseSSD*)fResponse)->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<3;j1++){ // only three in digit.
+ tracks[j1] = pList->GetTrack(k,ix,j1);
+ hits[j1] = pList->GetHit(k,ix,j1);
+ } // end for j1
+ // finally add digit
+ aliITS->AddSimDigit(2,0,digits,tracks,hits,charges);
} // end for ix
} // end for k
- delete [] pList;
}
+//______________________________________________________________________
+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)));
+// 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