#include <HDRShower.h>

Public Member Functions
bool	computeShower ()

float	getR ()

	HDRShower (const RandomEngineAndDistribution engine, HDShowerParametrization myParam, EcalHitMaker myGrid, HcalHitMaker myHcalHitMaker, int onECAL, double epart)

void	setFuncParam ()

bool	setHit (float espot, float theta)

void	thetaFunction (int nthetaStep)

virtual	~HDRShower ()

Private Attributes
float	decal

float	depthECAL

float	depthGAP

double	depthStart

double	e

float	EcalShift

float	EgridTable [NEnergyScan]

float	eHDspot

std::vector< float >	elastspot

float	EsCut

double	lambdaEM

double	lambdaHD

float	maxDepth

int	nthetaStep

int	onEcal

bool	qstatus

const RandomEngineAndDistribution *	random

float	rpdf [R_range]

EcalHitMaker *	theGrid

HcalHitMaker *	theHcalHitMaker

HDShowerParametrization *	theParam

float	Theta1amp [NEnergyScan]

float	Theta1ampSig [NEnergyScan]

float	Theta1Lambda [NEnergyScan]

float	Theta1LambdaSig [NEnergyScan]

float	ThetaLam21 [NEnergyScan]

float	ThetaLam21Sig [NEnergyScan]

std::vector< int >	thetaSpots

float	thetaStep

double	x0EM

double	x0HD

Detailed Description

Definition at line 22 of file HDRShower.h.

Constructor & Destructor Documentation

HDRShower::HDRShower	(	const RandomEngineAndDistribution *	engine,
		HDShowerParametrization *	myParam,
		EcalHitMaker *	myGrid,
		HcalHitMaker *	myHcalHitMaker,
		int	onECAL,
		double	epart
	)

Definition at line 23 of file HDRShower.cc.

References e, EcalShift, eHDspot, EsCut, M_PI, nthetaStep, setFuncParam(), and thetaStep.

   : theParam(myParam),
     theGrid(myGrid),
     theHcalHitMaker(myHcalHitMaker),
     onEcal(onECAL),
     e(epart),
     random(engine)
 { 
 
   eHDspot = 0.2;
   EsCut = 0.050;
   EcalShift = 0.12;
   nthetaStep = 10;
   thetaStep = 0.5*M_PI/nthetaStep;
 
   if(e < 0) e = 0.;
   setFuncParam(); 
 }

virtual HDRShower::~HDRShower ( )

inlinevirtual

Definition at line 33 of file HDRShower.h.

33 {;}

Member Function Documentation

bool HDRShower::computeShower ( )

Definition at line 47 of file HDRShower.cc.

References decal, depthECAL, depthGAP, depthStart, e, EcalHitMaker::ecalHcalGapTotalL0(), EcalShift, EcalHitMaker::ecalTotalL0(), eHDspot, elastspot, RandomEngineAndDistribution::flatShoot(), EcalHitMaker::getPads(), EcalHitMaker::hcalTotalL0(), i, j, create_public_lumi_plots::log, maxDepth, nthetaStep, onEcal, qstatus, random, setHit(), theGrid, theta(), thetaFunction(), thetaSpots, and thetaStep.

Referenced by CalorimetryManager::HDShowerSimulation().

 {  
   if(onEcal) {
     depthECAL = theGrid->ecalTotalL0();         // ECAL depth segment
     depthGAP  = theGrid->ecalHcalGapTotalL0();  // GAP  depth segment
   }
   else depthECAL = depthGAP  = 0;
 
   float depthHCAL = theGrid->hcalTotalL0();    // HCAL depth segment
 
   //  maxDepth   = depthECAL + depthGAP + depthHCAL - 1.0;
   maxDepth   = depthECAL + depthHCAL - 0.5;
   depthStart = log(1./random->flatShoot()); // starting point lambda unts
 
   if( depthStart > maxDepth ) { 
     depthStart = maxDepth *  random->flatShoot();
     if( depthStart < 0.) depthStart = 0.;
   }
   
   if( depthStart < EcalShift) depthStart = EcalShift;
 
   decal = (depthECAL + depthStart)*0.5;
   qstatus = false;
   if(decal < depthECAL) {
     qstatus = theGrid->getPads(decal);
 //    if(!qstatus)
 //      cout<<" depth rejected by getQuads(decal="<<decal<<") status="<<qstatus
 //    <<" depthECAL="<<depthECAL<<endl;
 
   }
 
   thetaFunction(nthetaStep);
   int maxLoops = 10000;
   float esum = e;
   for(int itheta = 0; itheta < nthetaStep; itheta++) {
     float theta, es;
     for(int i=0; i<=thetaSpots[itheta]; i++) {
       if(i == thetaSpots[itheta]) es = elastspot[itheta];
       else es = eHDspot;
       float loops = 0;
       for(int j=0; j<maxLoops; j++) {
     theta = (itheta+random->flatShoot())*thetaStep;
     if( setHit(es, theta) ) break;
     loops++;
       }
       esum -= es;  // to check only
     }
   }
   return(true);
 }

float HDRShower::getR ( )

Definition at line 127 of file HDRShower.cc.

References RandomEngineAndDistribution::flatShoot(), i, lambdaHD, AlCaHLTBitMon_ParallelJobs::p, alignCSCRings::r, R_range, random, and rpdf.

Referenced by setHit().

                       {
   float p = random->flatShoot();
   unsigned int i = 1; while( rpdf[i]<p && i<R_range-1) { i++; }
   float r;
   float dr = rpdf[i] - rpdf[i-1];
   if(dr != 0.0)
     r=(float(i) + (p - rpdf[i-1])/dr)/lambdaHD;
   else r = float(i)/lambdaHD;
   return(r);
 }

void HDRShower::setFuncParam ( )

Definition at line 195 of file HDRShower.cc.

References debug, e, HDShowerParametrization::ecalProperties(), EgridTable, create_public_lumi_plots::exp, HDShowerParametrization::hcalProperties(), i, ECALProperties::interactionLength(), HCALProperties::interactionLength(), lambdaEM, lambdafit, lambdaHD, create_public_lumi_plots::log, LogDebug, NEnergyScan, onEcal, funct::pow(), alignCSCRings::r, R_range, HCALProperties::radLenIncm(), rpdf, theParam, Theta1amp, Theta1ampSig, Theta1Lambda, Theta1LambdaSig, ThetaLam21, ThetaLam21Sig, x, and x0HD.

Referenced by HDRShower().

 {
   lambdaHD = theParam->hcalProperties()->interactionLength();
   x0HD     = theParam->hcalProperties()->radLenIncm();
   if(onEcal)
     lambdaEM = theParam->ecalProperties()->interactionLength();
   else lambdaEM = lambdaHD;
 
   if(debug)
     LogDebug("FastCalorimetry") <<"setFuncParam-> lambdaEM="<<lambdaEM<<" lambdaHD="<<lambdaHD<<endl; 
 
   float _EgridTable[NEnergyScan] = { 10, 20, 30, 50, 100, 300, 500 };
   float _Theta1amp[NEnergyScan] = { 1.57, 2.05, 2.27, 2.52, 2.66, 2.76, 2.76};
   float _Theta1ampSig[NEnergyScan]={2.40, 1.50, 1.25, 1.0,  0.8,  0.52, 0.52};
  
   float _Theta1Lambda[NEnergyScan] = { 
    0.086, 0.092, 0.88, 0.80, 0.0713, 0.0536, 0.0536 };
   float _Theta1LambdaSig[NEnergyScan] = { 
     0.038, 0.037, 0.027,0.03, 0.023,  0.018, 0.018 };
 
   float _ThetaLam21[NEnergyScan] =  { 2.8, 2.44, 2.6, 2.77, 3.16, 3.56, 3.56 };
   float _ThetaLam21Sig[NEnergyScan]={ 1.8, 0.97, 0.87, 0.77, 0.7, 0.49, 0.49 };
 
   for(int i=0; i<NEnergyScan; i++) {
     EgridTable[i]   = _EgridTable[i];
     Theta1amp[i]    = _Theta1amp[i];
     Theta1ampSig[i] = _Theta1ampSig[i];
     Theta1Lambda[i] = _Theta1Lambda[i];
     Theta1LambdaSig[i] = _Theta1LambdaSig[i];
     ThetaLam21[i]   = _ThetaLam21[i];
     ThetaLam21Sig[i]= _ThetaLam21Sig[i];
   }
 
 #define lambdafit 15.05
   float R_alfa = -0.0993 + 0.1114*log(e);
   float R_p = 0.589191 + 0.0463392 *log(e);
   float R_beta_lam=(0.54134 -0.00011148*e)/4.0*lambdafit;//was fitted in 4cmbin
   float LamOverX0 = lambdaHD/x0HD; // 10.52
   //  int R_range = 100; // 7 lambda
   //  rpdf.erase(rpdf.begin(),rpdf.end());
 
   rpdf[0] = 0.;  
   for(int i=1; i<R_range; i++) {
     float x = (float(i))/lambdaHD;
     float r = pow(x,R_alfa)*
       (R_p*exp(-R_beta_lam*x) + (1-R_p)*exp(-LamOverX0*R_beta_lam*x));
     rpdf[i] = r;
     //    rpdf.push_back(r);
   }
 
   for(int i=1; i<R_range; i++) rpdf[i] += rpdf[i-1];
   for(int i=0; i<R_range; i++) rpdf[i] /= rpdf[R_range -1];
 }

bool HDRShower::setHit	(	float	espot,
		float	theta
	)

Definition at line 98 of file HDRShower.cc.

References HcalHitMaker::addHit(), EcalHitMaker::addHit(), funct::cos(), depthECAL, depthGAP, depthStart, RandomEngineAndDistribution::flatShoot(), getR(), M_PI, maxDepth, onEcal, phi, qstatus, random, query::result, HcalHitMaker::setDepth(), HcalHitMaker::setSpotEnergy(), EcalHitMaker::setSpotEnergy(), funct::sin(), theGrid, and theHcalHitMaker.

Referenced by computeShower().

                                                {
 
   float phi = 2.*M_PI*random->flatShoot(); // temporary: 1st approximation
   float rshower = getR();     // temporary: 1st approximation
 
   float d = depthStart + rshower*cos(theta);
   if(d + depthGAP > maxDepth) return(false);
 
   // Commented (F.B) to remove a warning. Not used anywhere ? 
   //  bool inHcal = !onEcal || d>depthECAL || !qstatus;
   bool result = 0;
   if( !onEcal || d>depthECAL || !qstatus) { // in HCAL (HF or HB, HE)
     d += depthGAP;
     bool setHDdepth = theHcalHitMaker->setDepth(d);
     if( setHDdepth) {
     theHcalHitMaker->setSpotEnergy(espot);
     result = theHcalHitMaker->addHit(rshower*sin(theta),phi,0);
     }
     else LogWarning("FastCalorimetry") <<" setHit in HCAL failed d="<<d
          <<" maxDepth="<<maxDepth<<" onEcal'"<<onEcal<<endl;
   }
   else {
     //    bool status = theGrid->getQuads(d);
     theGrid->setSpotEnergy(espot);
     result = theGrid->addHit(rshower*sin(theta),phi,0);
   }
   return(result);
 }

void HDRShower::thetaFunction ( int nthetaStep )

Definition at line 138 of file HDRShower.cc.

References a, trackerHits::c, e, EgridTable, eHDspot, elastspot, EsCut, create_public_lumi_plots::exp, RandomEngineAndDistribution::flatShoot(), RandomEngineAndDistribution::gaussShoot(), i, gen::k, n, NEnergyScan, nthetaStep, AlCaHLTBitMon_ParallelJobs::p, random, theta(), Theta1amp, Theta1ampSig, Theta1Lambda, Theta1LambdaSig, ThetaLam21, ThetaLam21Sig, thetaSpots, and thetaStep.

Referenced by computeShower().

 {
   unsigned int i = 0; while( EgridTable[i]<e && i<NEnergyScan-1) { i++; }
 
   float amean, asig, lambda1, lambda1sig,lam21,lam21sig; 
   amean = Theta1amp[i]; asig = Theta1ampSig[i];
   lambda1 = Theta1Lambda[i]; lambda1sig = Theta1LambdaSig[i]; 
   lam21 = ThetaLam21[i]; lam21sig = ThetaLam21Sig[i];
   if(i==0) i=1;  //extrapolation to the left
   float c = (e-EgridTable[i-1])/(EgridTable[i]-EgridTable[i-1]);
 
   amean += (Theta1amp[i]-Theta1amp[i-1]) * c;
   asig += (Theta1ampSig[i]-Theta1ampSig[i-1]) * c;
   lambda1 +=(Theta1Lambda[i]-Theta1Lambda[i-1])  * c;
   lambda1sig += (Theta1LambdaSig[i]-Theta1LambdaSig[i-1]) * c;
   lam21 += (ThetaLam21[i]-ThetaLam21[i-1]) * c;
   lam21sig += (ThetaLam21Sig[i]-ThetaLam21Sig[i-1]) * c;
 
   float a = exp(amean + asig*random->gaussShoot());
   float L1 = lambda1 + lambda1sig*random->gaussShoot();
   if(L1 < 0.02) L1 = 0.02;
   float L2 = L1*(lam21 + lam21sig*random->gaussShoot());
 
   vector<double> pdf;
   pdf.erase(pdf.begin(),pdf.end());
   thetaSpots.erase(thetaSpots.begin(),thetaSpots.end());
   elastspot.erase(elastspot.begin(),elastspot.end());
   double sum = 0;
   for(int it=0; it<nthetaStep; it++) {
     float theta = it*thetaStep;
     float p = a*exp(L1*theta) + exp(L2*theta);
     sum += p;
     pdf.push_back(p);
   }
   float ntot = e/eHDspot;
   float esum=0;
   for(int it=0; it<nthetaStep; it++) {
     float fn = ntot*pdf[it]/sum;
     thetaSpots.push_back(int(fn));
     elastspot.push_back((fn - int(fn))*eHDspot);
   }
 
   for(int it=0; it<nthetaStep; it++)
     if(elastspot[it] <EsCut) {
       esum += elastspot[it]; elastspot[it] = 0; }
 
   float en = esum/EsCut; int n = int(en); 
   en = esum - n*EsCut;
 
   for(int ie=0; ie<=n; ie++) {
     int k = int(nthetaStep*random->flatShoot());
     if(k<0 || k>nthetaStep-1) k = k%nthetaStep;
     if(ie == n) elastspot[k] += en;
     else elastspot[k] += EsCut;
   }
 }