[u/mrichter/AliRoot.git] / ITS / AliITSsimulationSSD.cxx


#include <stdio.h>
#include <TObjArray.h>

#include "AliITSsegmentationSSD.h"
#include "AliITSresponseSSD.h"
#include "AliITSsimulationSSD.h"
#include "AliITSdictSSD.h"
#include "AliITSdcsSSD.h"
#include "AliITS.h"
#include "AliITShit.h"
#include "AliITSdigit.h"
#include "AliITSmodule.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    

}
//___________________________________________________________________________
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;
}
//_____________________________________________________________
AliITSsimulationSSD::AliITSsimulationSSD(AliITSsimulationSSD &source){
  // copy constructor
   *this = source;
}
//____________________________________________________________________________
AliITSsimulationSSD::~AliITSsimulationSSD() {
  // anihilator 


    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.
    
    TObjArray *hits = mod->GetHits();
    Int_t nhits = hits->GetEntriesFast();
    if (!nhits) return;

    //printf("simSSD: module nhits %d %d\n",module,nhits);

    Int_t i;
    for(i=0; i<fNstrips; i++) {
       (*fP)[i] = 0;
       (*fN)[i] = 0;
       fTracksP[i].ZeroTracks();
       fTracksN[i].ZeroTracks();
    }
    
    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 = -3;
       
    Float_t    ionization = 0;
    Float_t    signal;
    
    AliITSdictSSD *dict;  
    
 
    // 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);
        }
    }   
    
        
    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);
    
    xI *= kconvm;
    yI *= kconvm;
    zI *= kconvm;
    
    Float_t xE, yE, zE;
    hitE->GetPositionL(xE, yE, zE);
    
    xE *= kconvm;
    yE *= kconvm;
    zE *= kconvm;

    Float_t dx = (xE - xI);
    Float_t dz = (zE - zI);
              
    
    // 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); 
    */ 
    
    // end of debuging   
    
    
    eP=0;
    eN=0;
    
    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++) {
    
        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));
        //sN = sigmaN * sqrt(300. * i /(fSteps-i));

        sP = sigmaP * sqrt(300. * (i+1) / (fSteps));
        sN = sigmaN * sqrt(300. * (i+1) /(fSteps-i));


        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)        
        
        
	//printf("i=%d SigmaP SigmaN sP sN %f %f %e %e\n",i,sigmaP, sigmaN,sP,sN);
        
        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; 
    }
    
    
}


//____________________________________________________________________
//
//  Private Methods for Simulation
//______________________________________________________________________
//

void AliITSsimulationSSD::ApplyNoise() {
  // 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);
    }
}

//_________________________________________________________________________

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::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  

    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; 
    }
        
}

//__________________________________________________________________________

void AliITSsimulationSSD::ApplyDAQ() {
  // Converts simulated signals to simulated ADC counts
    AliITS *its=(AliITS*)gAlice->GetModule("ITS");

    Float_t noiseP, noiseN;
    fResponse->GetNoiseParam(noiseP,noiseN);

    char opt[30],dummy[20];
    fResponse->ParamOptions(opt,dummy);

    Int_t i,j;
    if (strstr(opt,"SetInvalid")) {
      printf("invalid option %s\n",opt);
      // 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]=-3;
    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;
	    //printf("P side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]);
	    charges[j] = 0;
	    hits[j] = -1;
          }
          its->AddSimDigit(2,phys,digits,tracks,hits,charges);
          
          //cout << (fTracksP+i)->GetNTracks(); 
          //
	  //if ((fTracksP+i)->GetNTracks() == 0) {
          //   cout << d.fCoord2 << " " << d.fSignal << "\n"; 
          //}
    }
    
    
    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;
	    //printf("N side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]);
            charges[j] = 0;
	    hits[j] = -1;
          }
          its->AddSimDigit(2,phys,digits,tracks,hits,charges);
          
          //cout << (fTracksN+i)->GetNTracks();
          //if ((fTracksN+i)->GetNTracks() == 0) {
          //   cout << d.fCoord2 << " " << d.fSignal << "\n"; 
          //}
    }
    
}


//____________________________________________________________________________

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);

    Float_t fval=0;
    if(s) fval=0.5*TMath::Erf(x * fPitch / s) ;
    else {
      Error("SSD simulation: F","sigma is zero!!!",s);
    }
    return fval;
} 

//______________________________________________________________________

Float_t AliITSsimulationSSD::Get2Strip(Int_t flag, Int_t iStrip, Float_t x, Float_t z){
  // Returns the relative space between two strips.

    // flag==1 for Pside, 0 for Nside

    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;
}
//____________________________________________________________________________
Commit	Line	Data
b0f5e3fc	1
	2	#include <stdio.h>
	3	#include <TObjArray.h>
	4
9e8d6423	5	#include "AliITSsegmentationSSD.h"
9e8d6423	6	#include "AliITSresponseSSD.h"
b0f5e3fc	7	#include "AliITSsimulationSSD.h"
	8	#include "AliITSdictSSD.h"
	9	#include "AliITSdcsSSD.h"
	10	#include "AliITS.h"
9e8d6423	11	#include "AliITShit.h"
	12	#include "AliITSdigit.h"
	13	#include "AliITSmodule.h"
b0f5e3fc	14	#include "AliRun.h"
	15
	16
	17	ClassImp(AliITSsimulationSSD);
	18	//------------------------------------------------------------
	19	AliITSsimulationSSD::AliITSsimulationSSD(AliITSsegmentation *seg,
	20	AliITSresponse *resp){
	21	// Constructor
	22
9e8d6423	23
b0f5e3fc	24	fSegmentation = seg;
	25	fResponse = resp;
	26	fDCS = new AliITSdcsSSD(seg,resp);
	27
	28	fNstrips = fSegmentation->Npx();
	29	fPitch = fSegmentation->Dpx(0);
	30
e8189707	31	fP = new TArrayF(fNstrips+1);
e8189707	32	fN = new TArrayF(fNstrips+1);
b0f5e3fc	33
e8189707	34	fTracksP = new AliITSdictSSD[fNstrips+1];
	35	fTracksN = new AliITSdictSSD[fNstrips+1];
	36
b0f5e3fc	37
	38	fSteps = 10; // still hard-wired - set in SetDetParam and get it via
	39	// fDCS together with the others eventually
	40
b0f5e3fc	41	}
	42	//___________________________________________________________________________
	43	AliITSsimulationSSD& AliITSsimulationSSD::operator=(AliITSsimulationSSD
	44	&source){
	45	// Operator =
	46	if(this==&source) return *this;
	47
	48	this->fDCS = new AliITSdcsSSD(*(source.fDCS));
	49	this->fN = new TArrayF(*(source.fN));
	50	this->fP = new TArrayF(*(source.fP));
	51	this->fTracksP = new AliITSdictSSD(*(source.fTracksP));
	52	this->fTracksN = new AliITSdictSSD(*(source.fTracksN));
	53	this->fNstrips = source.fNstrips;
	54	this->fPitch = source.fPitch;
	55	this->fSteps = source.fSteps;
	56	return *this;
	57	}
	58	//_____________________________________________________________
	59	AliITSsimulationSSD::AliITSsimulationSSD(AliITSsimulationSSD &source){
	60	// copy constructor
	61	*this = source;
	62	}
	63	//____________________________________________________________________________
	64	AliITSsimulationSSD::~AliITSsimulationSSD() {
9e8d6423	65	// anihilator
9e8d6423	66
e8189707	67
b0f5e3fc	68	if(fP) delete fP;
b0f5e3fc	69	if(fN) delete fN;
9e8d6423	70
	71	if(fTracksP) delete [] fTracksP;
	72	if(fTracksN) delete [] fTracksN;
b0f5e3fc	73
b0f5e3fc	74	delete fDCS;
9e8d6423	75
b0f5e3fc	76	}
	77	//_______________________________________________________________
	78	//
	79	// Hit to digit
	80	//_______________________________________________________________
	81	//
	82	void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t module,
	83	Int_t dummy) {
	84	// Digitizes one SSD module of hits.
	85
	86	TObjArray *hits = mod->GetHits();
	87	Int_t nhits = hits->GetEntriesFast();
b0f5e3fc	88	if (!nhits) return;
b0f5e3fc	89
9e8d6423	90	//printf("simSSD: module nhits %d %d\n",module,nhits);
9e8d6423	91
b0f5e3fc	92	Int_t i;
	93	for(i=0; i<fNstrips; i++) {
	94	(*fP)[i] = 0;
	95	(*fN)[i] = 0;
	96	fTracksP[i].ZeroTracks();
	97	fTracksN[i].ZeroTracks();
	98	}
	99
	100	for(i=0; i<nhits; i++) {
	101	Int_t idtrack=mod->GetHitTrackIndex(i);
	102	HitToDigit(i,idtrack,nhits,hits);
	103	}
	104
	105
e8189707	106
b0f5e3fc	107	ApplyNoise();
	108	ApplyCoupling();
	109	ApplyThreshold();
	110	ApplyDAQ();
	111
	112
	113	}
	114
	115	//---------------------------------------------------------------
	116
	117	void AliITSsimulationSSD::HitToDigit(Int_t & hitNo,Int_t idtrack,
	118	Int_t nhits,TObjArray *hits) {
	119	// Turns one or more hits in an SSD module into one or more digits.
	120
	121	Int_t stripP, stripN, i;
	122	Float_t dsP, dsN;
	123	Float_t sP, sN;
	124	Float_t eP, eN;
e8189707	125	Float_t arrayEP[10]; // hard-wired number of steps
bba587ca	126	Float_t arrayEN[10];
9e8d6423	127	Int_t track = -3;
b0f5e3fc	128
	129	Float_t ionization = 0;
	130	Float_t signal;
	131
	132	AliITSdictSSD *dict;
	133
	134
	135	// check if this is the right order !!!!!
	136
	137	AliITShit hitI = (AliITShit)hits->At(hitNo++);
	138	AliITShit hitE = (AliITShit)hits->At(hitNo);
	139
	140
	141	while (!((hitE->StatusExiting()) \|\|
	142	(hitE->StatusDisappeared()) \|\|
	143	(hitE->StatusStop()))) {
	144
	145	if (++hitNo<nhits) {
	146	ionization = hitE->GetIonization();
	147	hitE = (AliITShit*)hits->At(hitNo);
	148	}
	149	}
	150
	151
	152	if (hitI->GetTrack() == hitE->GetTrack())
e8189707	153	//track = idtrack;
b0f5e3fc	154	track = hitI->GetTrack();
	155	else
	156	printf("!!! Emergency !!!\n");
	157
	158
	159	ionization += hitE->GetIonization();
	160
	161	const Float_t kconvm=10000.; // cm -> microns
	162
	163	Float_t xI, yI, zI;
	164	hitI->GetPositionL(xI, yI, zI);
	165
b0f5e3fc	166	xI *= kconvm;
	167	yI *= kconvm;
	168	zI *= kconvm;
	169
	170	Float_t xE, yE, zE;
	171	hitE->GetPositionL(xE, yE, zE);
	172
b0f5e3fc	173	xE *= kconvm;
	174	yE *= kconvm;
	175	zE *= kconvm;
	176
	177	Float_t dx = (xE - xI);
	178	Float_t dz = (zE - zI);
	179
	180
	181	// Debuging
	182	/*
e8189707	183	fSegmentation->GetPadIxz(xI,zI,stripP,stripN);
b0f5e3fc	184
	185	printf("%5d %8.3f %8.3f %8.3f %8.3f %d %d %d\n",
	186	hitNo, xI, zI, dx, dz,
	187	stripP, stripN, track);
	188	printf("%10.5f %10d \n", ionization, hitI->fTrack);
	189	*/
	190
	191	// end of debuging
	192
	193
	194	eP=0;
	195	eN=0;
b0f5e3fc	196
e8189707	197	for (i=0; i<fSteps; i++) {
b0f5e3fc	198
	199	// arrayEP[i] = gRandom->Landau(ionization/fSteps, ionization/(4*fSteps));
	200	// arrayEN[i] = gRandom->Landau(ionization/fSteps, ionization/(4*fSteps));
	201	arrayEP[i] = ionization/fSteps;
	202	arrayEN[i] = ionization/fSteps;
	203
	204	eP += arrayEP[i];
	205	eN += arrayEN[i];
	206	}
	207
	208	const Float_t kconv = 1.0e9 / 3.6; // GeV -> e-hole pairs
	209
	210	for(i=0; i<fSteps; i++) {
	211
	212	arrayEP[i] = kconv * arrayEP[i] * (ionization / eP);
	213	arrayEN[i] = kconv * arrayEN[i] * (ionization / eN);
	214	}
	215
	216	dx /= fSteps;
	217	dz /= fSteps;
	218
	219	Float_t sigmaP, sigmaN;
	220	fResponse->SigmaSpread(sigmaP,sigmaN);
	221
	222	//printf("SigmaP SigmaN %f %f\n",sigmaP, sigmaN);
	223
	224	Float_t noiseP, noiseN;
	225	fResponse->GetNoiseParam(noiseP,noiseN);
	226
	227	//printf("NoiseP NoiseN %f %f\n",noiseP, noiseN);
	228
	229	for(i=0; i<fSteps; i++) {
	230
	231	Int_t j;
	232
e8189707	233	fSegmentation->GetPadIxz(xI,zI,stripP,stripN);
e8189707	234	//printf("hitNo %d i xI zI stripP stripN %d %f %f %d %d\n",hitNo,i,xI, zI, stripP, stripN);
b0f5e3fc	235	dsP = Get2Strip(1,stripP,xI, zI); // Between 0-1
	236	dsN = Get2Strip(0,stripN,xI, zI); // Between 0-1
	237
9e8d6423	238	//sP = sigmaP * sqrt(300. * i / (fSteps));
	239	//sN = sigmaN * sqrt(300. * i /(fSteps-i));
	240
	241	sP = sigmaP * sqrt(300. * (i+1) / (fSteps));
	242	sN = sigmaN * sqrt(300. * (i+1) /(fSteps-i));
b0f5e3fc	243
	244
	245	sP = (i<2 && dsP>0.3 && dsP<0.7)? 20. : sP; // square of (microns)
	246	sN = (i>fSteps-2 && dsN>0.3 && dsN<0.7)? 20. : sN; // square of (microns)
	247
	248	sP = (i==2 && dsP>0.4 && dsP<0.6)? 15. : sP; // square of (microns)
	249	sN = (i==8 && dsN>0.4 && dsN<0.6)? 15. : sN; // square of (microns)
	250
9e8d6423	251
	252	//printf("i=%d SigmaP SigmaN sP sN %f %f %e %e\n",i,sigmaP, sigmaN,sP,sN);
	253
e8189707	254	for (j=-1; j<2; j++) {
b0f5e3fc	255	if (stripP+j<0 \|\| stripP+j>fNstrips) continue;
b0f5e3fc	256	signal = arrayEP[i] * TMath::Abs( (F(j+0.5-dsP,sP)-F(j-0.5-dsP,sP)) );
	257	//printf("SimSSD::HitsToDigits:%d arrayEP[%d]=%e signal=%e\n",j,i,arrayEP[i],signal);
	258	if (signal > noiseP/fSteps) {
	259	(*fP)[stripP+j] += signal;
	260	dict = (fTracksP+stripP+j);
	261	(*dict).AddTrack(track);
	262	}
	263	} // end for j loop over neighboring strips
e8189707	264
e8189707	265	for (j=-1; j<2; j++) {
b0f5e3fc	266	if (stripN+j<0 \|\| stripN+j>fNstrips) continue;
b0f5e3fc	267	signal = arrayEN[i] * TMath::Abs( (F(j+0.5-dsN,sN)-F(j-0.5-dsN,sN)) );
	268	//printf("SimSSD::HitsToDigits:%d arrayEN[%d]=%e signal=%e\n",j,i,arrayEN[i],signal);
	269	if (signal > noiseN/fSteps) {
	270	(*fN)[stripN+j] += signal;
	271	dict = (fTracksN+stripN+j); //co to jest
	272	(*dict).AddTrack(track);
	273	}
	274	} // end for j loop over neighboring strips
	275
	276	xI += dx;
	277	zI += dz;
	278	}
	279
	280
	281	}
	282
	283
	284	//____________________________________________________________________
	285	//
	286	// Private Methods for Simulation
	287	//______________________________________________________________________
	288	//
	289
	290	void AliITSsimulationSSD::ApplyNoise() {
	291	// Apply Noise.
	292	Float_t noiseP, noiseN;
	293	fResponse->GetNoiseParam(noiseP,noiseN);
	294
	295	Int_t i;
	296	for(i = 0; i<fNstrips; i++) {
	297	(*fP)[i] += gRandom->Gaus(0,noiseP);
	298	(*fN)[i] += gRandom->Gaus(0,noiseN);
	299	}
	300	}
	301
	302	//_________________________________________________________________________
	303
	304	void AliITSsimulationSSD::ApplyCoupling() {
	305	// Apply the effecto of electronic coupling between channels
b0f5e3fc	306	Int_t i;
	307	for(i = 1; i<fNstrips-1; i++) {
	308	(fP)[i] += (fP)[i-1]fDCS->GetCouplingPL() + (fP)[i+1]*fDCS->GetCouplingPR();
	309	(fN)[i] += (fN)[i-1]fDCS->GetCouplingNL() + (fN)[i+1]*fDCS->GetCouplingNR();
	310	}
	311	}
	312
	313	//__________________________________________________________________________
	314
	315	void AliITSsimulationSSD::ApplyThreshold() {
	316	// Applies the effect of a threshold on the signals for digitization.
	317	Float_t noiseP, noiseN;
	318	fResponse->GetNoiseParam(noiseP,noiseN);
	319
	320	// or introduce the SetThresholds in fResponse
	321
	322	Int_t i;
	323	for(i=0; i<fNstrips; i++) {
	324	(fP)[i] = ((fP)[i] > noiseP4) ? (fP)[i] : 0;
	325	(fN)[i] = ((fN)[i] > noiseN4) ? (fN)[i] : 0;
b0f5e3fc	326	}
	327
	328	}
	329
	330	//__________________________________________________________________________
	331
	332	void AliITSsimulationSSD::ApplyDAQ() {
	333	// Converts simulated signals to simulated ADC counts
	334	AliITS its=(AliITS)gAlice->GetModule("ITS");
	335
	336	Float_t noiseP, noiseN;
	337	fResponse->GetNoiseParam(noiseP,noiseN);
	338
e8189707	339	char opt[30],dummy[20];
	340	fResponse->ParamOptions(opt,dummy);
	341
b0f5e3fc	342	Int_t i,j;
e8189707	343	if (strstr(opt,"SetInvalid")) {
9e8d6423	344	printf("invalid option %s\n",opt);
e8189707	345	// Set signal = 0 if invalid strip
	346	for(i=0; i<fNstrips; i++) {
	347	if (!(fDCS->IsValidP(i))) (*fP)[i] = 0;
	348	if (!(fDCS->IsValidN(i))) (*fN)[i] = 0;
	349	}
b0f5e3fc	350	}
b0f5e3fc	351
e8189707	352	Int_t digits[3], tracks[3], hits[3];
b0f5e3fc	353	Float_t charges[3];
b0f5e3fc	354	Float_t phys=0;
9e8d6423	355	for(i=0;i<3;i++) tracks[i]=-3;
b0f5e3fc	356	for(i=0; i<fNstrips; i++) {
e8189707	357	if( (strstr(opt,"SetInvalid") && (fP)[i] < noiseP4) \|\| !(*fP)[i]) continue;
b0f5e3fc	358	digits[0]=1;
	359	digits[1]=i;
	360	digits[2]=(int)(*fP)[i];
	361	for(j=0; j<(fTracksP+i)->GetNTracks(); j++) {
e8189707	362	if(j>2) continue;
	363	if((fTracksP+i)->GetNTracks()) tracks[j]=(fTracksP+i)->GetTrack(j);
	364	else tracks[j]=-2;
9e8d6423	365	//printf("P side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]);
e8189707	366	charges[j] = 0;
e8189707	367	hits[j] = -1;
b0f5e3fc	368	}
e8189707	369	its->AddSimDigit(2,phys,digits,tracks,hits,charges);
b0f5e3fc	370
9e8d6423	371	//cout << (fTracksP+i)->GetNTracks();
	372	//
	373	//if ((fTracksP+i)->GetNTracks() == 0) {
	374	// cout << d.fCoord2 << " " << d.fSignal << "\n";
	375	//}
b0f5e3fc	376	}
	377
	378
	379	for(i=0; i<fNstrips; i++) {
e8189707	380	if( (strstr(opt,"SetInvalid") && (fN)[i] < noiseN4)\|\| !(*fN)[i]) continue;
b0f5e3fc	381	digits[0]=0;
	382	digits[1]=i;
	383	digits[2]=(int)(*fN)[i];
e8189707	384	for( j=0; j<(fTracksN+i)->GetNTracks(); j++) {
	385	if(j>2) continue;
	386	if((fTracksN+i)->GetNTracks()) tracks[j]=(fTracksN+i)->GetTrack(j);
	387	else tracks[j]=-2;
9e8d6423	388	//printf("N side: i,j,tracks[j] %d %d %d\n",i,j,tracks[j]);
e8189707	389	charges[j] = 0;
e8189707	390	hits[j] = -1;
b0f5e3fc	391	}
e8189707	392	its->AddSimDigit(2,phys,digits,tracks,hits,charges);
b0f5e3fc	393
9e8d6423	394	//cout << (fTracksN+i)->GetNTracks();
	395	//if ((fTracksN+i)->GetNTracks() == 0) {
	396	// cout << d.fCoord2 << " " << d.fSignal << "\n";
	397	//}
b0f5e3fc	398	}
	399
	400	}
	401
	402
	403	//____________________________________________________________________________
	404
	405	Float_t AliITSsimulationSSD::F(Float_t x, Float_t s) {
	406	// Computes the integral of a gaussian at the mean valuse x with sigma s.
	407	//printf("SDD:F(%e,%e)\n",x,s);
9e8d6423	408
	409	Float_t fval=0;
	410	if(s) fval=0.5TMath::Erf(x fPitch / s) ;
	411	else {
	412	Error("SSD simulation: F","sigma is zero!!!",s);
	413	}
	414	return fval;
b0f5e3fc	415	}
	416
	417	//______________________________________________________________________
	418
	419	Float_t AliITSsimulationSSD::Get2Strip(Int_t flag, Int_t iStrip, Float_t x, Float_t z){
	420	// Returns the relative space between two strips.
	421
	422	// flag==1 for Pside, 0 for Nside
	423
	424	Float_t stereoP, stereoN;
	425	fSegmentation->Angles(stereoP,stereoN);
	426
	427	Float_t tanP=TMath::Tan(stereoP);
	428	Float_t tanN=TMath::Tan(stereoN);
	429
	430	Float_t dx = fSegmentation->Dx();
	431	Float_t dz = fSegmentation->Dz();
	432
	433
	434	x += dx/2;
	435	z += dz/2;
	436
	437	if (flag) return (x - z*tanP) / fPitch - iStrip; // from 0 to 1
	438	else return (x - tanN*(dz - z)) / fPitch - iStrip;
	439	}
	440	//____________________________________________________________________________