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//FastSimulation Headers
#include "FastSimulation/ShowerDevelopment/interface/HFShower.h"
//#include "FastSimulation/Utilities/interface/Histos.h"
#include "FastSimulation/Utilities/interface/RandomEngineAndDistribution.h"
//////////////////////////////////////////////////////////////////////
// What's this?
//#include "FastSimulation/FamosCalorimeters/interface/FASTCalorimeter.h"
#include "FastSimulation/CaloHitMakers/interface/EcalHitMaker.h"
#include "FastSimulation/CaloHitMakers/interface/HcalHitMaker.h"
// CMSSW headers
#include "FWCore/MessageLogger/interface/MessageLogger.h"
///////////////////////////////////////////////////////////////
// And This???? Doesn't seem to be needed
// #include "Calorimetry/CaloDetector/interface/CellGeometry.h"
#include <cmath>
// number attempts for transverse distribution if exit on a spec. condition
#define infinity 5000
// debugging flag ( 0, 1, 2, 3)
#define debug 0
using namespace edm;
HFShower::HFShower(const RandomEngineAndDistribution* engine,
HDShowerParametrization* myParam,
EcalHitMaker* myGrid,
HcalHitMaker* myHcalHitMaker,
int onECAL,
double epart)
: theParam(myParam), theGrid(myGrid), theHcalHitMaker(myHcalHitMaker), onEcal(onECAL), e(epart), random(engine) {
// To get an access to constants read in FASTCalorimeter
// FASTCalorimeter * myCalorimeter= FASTCalorimeter::instance();
// Values taken from FamosGeneric/FamosCalorimeter/src/FASTCalorimeter.cc
lossesOpt = myParam->hsParameters()->getHDlossesOpt();
nDepthSteps = myParam->hsParameters()->getHDnDepthSteps();
nTRsteps = myParam->hsParameters()->getHDnTRsteps();
transParam = myParam->hsParameters()->getHDtransParam();
eSpotSize = myParam->hsParameters()->getHDeSpotSize();
depthStep = myParam->hsParameters()->getHDdepthStep();
criticalEnergy = myParam->hsParameters()->getHDcriticalEnergy();
maxTRfactor = myParam->hsParameters()->getHDmaxTRfactor();
balanceEH = myParam->hsParameters()->getHDbalanceEH();
hcalDepthFactor = myParam->hsParameters()->getHDhcalDepthFactor();
// Special tr.size fluctuations
transParam *= (1. + random->flatShoot());
// Special ad hoc long. extension + some fluctuations
double depthExt;
if (e < 50.)
depthExt = 0.8 * (50. - e) / 50. + 0.3;
else {
if (e < 500.)
depthExt = (500. - e) / 500. * 0.4 - 0.1;
else
depthExt = -0.1;
}
hcalDepthFactor += depthExt + 0.05 * (2. * random->flatShoot() - 1.);
// normally 1, in HF - might be smaller to take into account
// a narrowness of the HF shower (Cherenkov light)
if (e < 50.)
transFactor = 0.5 - (50. - e) / 50. * 0.2;
else
transFactor = 0.7 - (1000. - e) / 1000. * 0.2;
// simple protection ...
if (e < 0)
e = 0.;
// Get the Famos Histos pointer
// myHistos = FamosHistos::instance();
// std::cout << " Hello FamosShower " << std::endl;
theECALproperties = theParam->ecalProperties();
theHCALproperties = theParam->hcalProperties();
double emax = theParam->emax();
double emid = theParam->emid();
double emin = theParam->emin();
double effective = e;
if (e < emid) {
theParam->setCase(1);
// avoid "underflow" below Emin (for parameters calculation only)
if (e < emin)
effective = emin;
} else
theParam->setCase(2);
// A bit coarse espot size for HF...
eSpotSize *= 2.5;
if (effective > 0.5 * emax) {
eSpotSize *= 2.;
if (effective > emax) {
effective = emax;
eSpotSize *= 3.;
depthStep *= 2.;
}
}
if (debug == 2)
LogDebug("FastCalorimetry") << " HFShower : " << std::endl
<< " Energy " << e << std::endl
<< " lossesOpt " << lossesOpt << std::endl
<< " nDepthSteps " << nDepthSteps << std::endl
<< " nTRsteps " << nTRsteps << std::endl
<< " transParam " << transParam << std::endl
<< " eSpotSize " << eSpotSize << std::endl
<< " criticalEnergy " << criticalEnergy << std::endl
<< " maxTRfactor " << maxTRfactor << std::endl
<< " balanceEH " << balanceEH << std::endl
<< "hcalDepthFactor " << hcalDepthFactor << std::endl;
double alpEM1 = theParam->alpe1();
double alpEM2 = theParam->alpe2();
double betEM1 = theParam->bete1();
double betEM2 = theParam->bete2();
double alpHD1 = theParam->alph1();
double alpHD2 = theParam->alph2();
double betHD1 = theParam->beth1();
double betHD2 = theParam->beth2();
double part1 = theParam->part1();
double part2 = theParam->part2();
aloge = std::log(effective);
double edpar = (theParam->e1() + aloge * theParam->e2()) * effective;
double aedep = std::log(edpar);
if (debug == 2)
LogDebug("FastCalorimetry") << " HFShower : " << std::endl
<< " edpar " << edpar << " aedep " << aedep << std::endl
<< " alpEM1 " << alpEM1 << std::endl
<< " alpEM2 " << alpEM2 << std::endl
<< " betEM1 " << betEM1 << std::endl
<< " betEM2 " << betEM2 << std::endl
<< " alpHD1 " << alpHD1 << std::endl
<< " alpHD2 " << alpHD2 << std::endl
<< " betHD1 " << betHD1 << std::endl
<< " betHD2 " << betHD2 << std::endl
<< " part1 " << part1 << std::endl
<< " part2 " << part2 << std::endl;
// private members to set
theR1 = theParam->r1();
theR2 = theParam->r2();
theR3 = theParam->r3();
alpEM = alpEM1 + alpEM2 * aedep;
tgamEM = tgamma(alpEM);
betEM = betEM1 - betEM2 * aedep;
alpHD = alpHD1 + alpHD2 * aedep;
tgamHD = tgamma(alpHD);
betHD = betHD1 - betHD2 * aedep;
part = part1 - part2 * aedep;
if (part > 1.)
part = 1.; // protection - just in case of
if (debug == 2)
LogDebug("FastCalorimetry") << " HFShower : " << std::endl
<< " alpEM " << alpEM << std::endl
<< " tgamEM " << tgamEM << std::endl
<< " betEM " << betEM << std::endl
<< " alpHD " << alpHD << std::endl
<< " tgamHD " << tgamHD << std::endl
<< " betHD " << betHD << std::endl
<< " part " << part << std::endl;
if (onECAL) {
lambdaEM = theParam->ecalProperties()->interactionLength();
x0EM = theParam->ecalProperties()->radLenIncm();
} else {
lambdaEM = 0.;
x0EM = 0.;
}
lambdaHD = theParam->hcalProperties()->interactionLength();
x0HD = theParam->hcalProperties()->radLenIncm();
if (debug == 2)
LogDebug("FastCalorimetry") << " HFShower e " << e << std::endl
<< " x0EM = " << x0EM << std::endl
<< " x0HD = " << x0HD << std::endl
<< " lamEM = " << lambdaEM << std::endl
<< " lamHD = " << lambdaHD << std::endl;
// Starting point of the shower
// try first with ECAL lambda
double sum1 = 0.; // lambda path from the ECAL/HF entrance;
double sum2 = 0.; // lambda path from the interaction point;
double sum3 = 0.; // x0 path from the interaction point;
int nsteps = 0; // full number of longitudinal steps (counter);
int nmoresteps; // how many longitudinal steps in addition to
// one (if interaction happens there) in ECAL
if (e < criticalEnergy)
nmoresteps = 1;
else
nmoresteps = nDepthSteps;
double depthECAL = 0.;
double depthGAP = 0.;
double depthGAPx0 = 0.;
if (onECAL) {
depthECAL = theGrid->ecalTotalL0(); // ECAL depth segment
depthGAP = theGrid->ecalHcalGapTotalL0(); // GAP depth segment
depthGAPx0 = theGrid->ecalHcalGapTotalX0(); // GAP depth x0
}
double depthHCAL = theGrid->hcalTotalL0(); // HCAL depth segment
double depthToHCAL = depthECAL + depthGAP;
//---------------------------------------------------------------------------
// Depth simulation & various protections, among them
// if too deep - get flat random in the allowed region
// if no HCAL material behind - force to deposit in ECAL
double maxDepth = depthToHCAL + depthHCAL - 1.1 * depthStep;
double depthStart = std::log(1. / random->flatShoot()); // starting point lambda unts
if (e < emin) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : e <emin -> depthStart = 0" << std::endl;
depthStart = 0.;
}
if (depthStart > maxDepth) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : depthStart too big ... = " << depthStart << std::endl;
depthStart = maxDepth * random->flatShoot();
if (depthStart < 0.)
depthStart = 0.;
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : depthStart re-calculated = " << depthStart << std::endl;
}
if (onECAL && e < emid) {
if ((depthECAL - depthStart) / depthECAL > 0.2 && depthECAL > depthStep) {
depthStart = 0.5 * depthECAL * random->flatShoot();
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : small energy, "
<< " depthStart reduced to = " << depthStart << std::endl;
}
}
if (depthHCAL < depthStep) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : depthHCAL too small ... = " << depthHCAL
<< " depthStart -> forced to 0 !!!" << std::endl;
depthStart = 0.;
nmoresteps = 0;
if (depthECAL < depthStep) {
nsteps = -1;
LogInfo("FastCalorimetry") << " FamosHFShower : too small ECAL and HCAL depths - "
<< " particle is lost !!! " << std::endl;
}
}
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower depths(lam) - " << std::endl
<< " ECAL = " << depthECAL << std::endl
<< " GAP = " << depthGAP << std::endl
<< " HCAL = " << depthHCAL << std::endl
<< " starting point = " << depthStart << std::endl;
if (onEcal) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : onECAL" << std::endl;
if (depthStart < depthECAL) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : depthStart < depthECAL" << std::endl;
if ((depthECAL - depthStart) / depthECAL > 0.25 && depthECAL > depthStep) {
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : enough space to make ECAL step" << std::endl;
// ECAL - one step
nsteps++;
sum1 += depthECAL; // at the end of step
sum2 += depthECAL - depthStart;
sum3 += sum2 * lambdaEM / x0EM;
lamtotal.push_back(sum1);
lamdepth.push_back(sum2);
lamcurr.push_back(lambdaEM);
lamstep.push_back(depthECAL - depthStart);
x0depth.push_back(sum3);
x0curr.push_back(x0EM);
detector.push_back(1);
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : "
<< " in ECAL sum1, sum2 " << sum1 << " " << sum2 << std::endl;
// // Gap - no additional step after ECAL
// // just move further to HCAL over the gap
sum1 += depthGAP;
sum2 += depthGAP;
sum3 += depthGAPx0;
}
// Just shift starting point to HCAL
else {
// cout << " FamosHFShower : not enough space to make ECAL step" << std::endl;
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : goto HCAL" << std::endl;
depthStart = depthToHCAL;
sum1 += depthStart;
}
} else { // GAP or HCAL
if (depthStart >= depthECAL && depthStart < depthToHCAL) {
depthStart = depthToHCAL; // just a shift to HCAL for simplicity
}
sum1 += depthStart;
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : goto HCAL" << std::endl;
}
} else { // Forward
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower : forward" << std::endl;
sum1 += depthStart;
}
for (int i = 0; i < nmoresteps; i++) {
sum1 += depthStep;
if (sum1 > (depthECAL + depthGAP + depthHCAL))
break;
sum2 += depthStep;
sum3 += sum2 * lambdaHD / x0HD;
lamtotal.push_back(sum1);
lamdepth.push_back(sum2);
lamcurr.push_back(lambdaHD);
lamstep.push_back(depthStep);
x0depth.push_back(sum3);
x0curr.push_back(x0HD);
detector.push_back(3);
nsteps++;
}
// Make fractions of energy and transverse radii at each step
// PV
// std::cout << "HFShower::HFShower() : Nsteps = " << nsteps << std::endl;
if (nsteps > 0) {
makeSteps(nsteps);
}
}
void HFShower::makeSteps(int nsteps) {
double sumes = 0.;
double sum = 0.;
std::vector<double> temp;
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::makeSteps - "
<< " nsteps required : " << nsteps << std::endl;
int count = 0;
for (int i = 0; i < nsteps; i++) {
double deplam = lamdepth[i] - 0.5 * lamstep[i];
double depx0 = x0depth[i] - 0.5 * lamstep[i] / x0curr[i];
double x = betEM * depx0;
double y = betHD * deplam;
if (debug == 2)
LogDebug("FastCalorimetry") << " FamosHFShower::makeSteps "
<< " - step " << i << " depx0, x = " << depx0 << ", " << x
<< " deplam, y = " << deplam << ", " << y << std::endl;
double est = (part * betEM * gam(x, alpEM) * lamcurr[i] / (x0curr[i] * tgamEM) +
(1. - part) * betHD * gam(y, alpHD) / tgamHD) *
lamstep[i];
// protection ...
if (est < 0.) {
LogDebug("FastCalorimetry") << "*** FamosHFShower::makeSteps "
<< " - negative step energy !!!" << std::endl;
break;
}
// for estimates only
sum += est;
int nPest = (int)(est * e / sum / eSpotSize);
if (debug == 2)
LogDebug("FastCalorimetry") << " FamosHFShower::makeSteps - nPoints estimate = " << nPest << std::endl;
if (nPest <= 1 && count != 0)
break;
// good step - to proceed
temp.push_back(est);
sumes += est;
rlamStep.push_back(transParam * (theR1 + (theR2 - theR3 * aloge)) * deplam * transFactor);
count++;
}
// fluctuations in ECAL and re-distribution of remaining energy in HCAL
if (detector[0] == 1 && count > 1) {
double oldECALenergy = temp[0];
double oldHCALenergy = sumes - oldECALenergy;
double newECALenergy = 2. * sumes;
for (int i = 0; newECALenergy > sumes && i < infinity; i++)
newECALenergy = 2. * balanceEH * random->flatShoot() * oldECALenergy;
if (debug == 2)
LogDebug("FastCalorimetry") << "*** FamosHFShower::makeSteps "
<< " ECAL fraction : old/new - " << oldECALenergy / sumes << "/"
<< newECALenergy / sumes << std::endl;
temp[0] = newECALenergy;
double newHCALenergy = sumes - newECALenergy;
double newHCALreweight = newHCALenergy / oldHCALenergy;
for (int i = 1; i < count; i++) {
temp[i] *= newHCALreweight;
}
}
// final re-normalization of the energy fractions
for (int i = 0; i < count; i++) {
eStep.push_back(temp[i] * e / sumes);
nspots.push_back((int)(eStep[i] / eSpotSize) + 1);
if (debug)
LogDebug("FastCalorimetry") << i << " xO and lamdepth at the end of step = " << x0depth[i] << " " << lamdepth[i]
<< " Estep func = " << eStep[i] << " Rstep = " << rlamStep[i]
<< " Nspots = " << nspots[i] << std::endl;
}
// The only step is in ECAL - let's make the size bigger ...
if (count == 1 and detector[0] == 1)
rlamStep[0] *= 2.;
if (debug) {
if (eStep[0] > 0.95 * e && detector[0] == 1)
LogDebug("FastCalorimetry") << " FamosHFShower::makeSteps - "
<< "ECAL energy = " << eStep[0] << " out of total = " << e << std::endl;
}
}
bool HFShower::compute() {
// TimeMe theT("FamosHFShower::compute");
bool status = false;
int numLongit = eStep.size();
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - "
<< " N_long.steps required : " << numLongit << std::endl;
if (numLongit > 0) {
status = true;
// Prepare the trsanverse probability function
std::vector<double> Fhist;
std::vector<double> rhist;
for (int j = 0; j < nTRsteps + 1; j++) {
rhist.push_back(maxTRfactor * j / nTRsteps);
Fhist.push_back(transProb(maxTRfactor, 1., rhist[j]));
if (debug == 3)
LogDebug("FastCalorimetry") << "indexFinder - i, Fhist[i] = " << j << " " << Fhist[j] << std::endl;
}
//================================================================
// Longitudinal steps
//================================================================
for (int i = 0; i < numLongit; i++) {
double currentDepthL0 = lamtotal[i] - 0.5 * lamstep[i];
// vary the longitudinal profile if needed
if (detector[i] != 1)
currentDepthL0 *= hcalDepthFactor;
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - detector = " << detector[i]
<< " currentDepthL0 = " << currentDepthL0 << std::endl;
double maxTRsize = maxTRfactor * rlamStep[i]; // in lambda units
double rbinsize = maxTRsize / nTRsteps;
double espot = eStep[i] / (double)nspots[i]; // re-adjust espot
if (espot > 4. || espot < 0.)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - unphysical espot = " << espot << std::endl;
int ecal = 0;
if (detector[i] != 1) {
bool setHDdepth = theHcalHitMaker->setDepth(currentDepthL0);
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - status of "
<< " theHcalHitMaker->setDepth(currentDepthL0) is " << setHDdepth << std::endl;
if (!setHDdepth) {
currentDepthL0 -= lamstep[i];
setHDdepth = theHcalHitMaker->setDepth(currentDepthL0);
}
if (!setHDdepth)
continue;
theHcalHitMaker->setSpotEnergy(espot);
} else {
ecal = 1;
bool status = theGrid->getPads(currentDepthL0);
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - status of Grid = " << status << std::endl;
if (!status)
continue;
theGrid->setSpotEnergy(espot);
}
//------------------------------------------------------------
// Transverse distribution
//------------------------------------------------------------
int nok = 0; // counter of OK
int count = 0;
int inf = infinity;
if (lossesOpt)
inf = nspots[i]; // losses are enabled, otherwise
// only OK points are counted ...
// Total energy in this layer
double eremaining = eStep[i];
bool converged = false;
while (eremaining > 0. && !converged && count < inf) {
++count;
// energy spot (HFL)
double newespot = espot;
// We need to know a priori if this energy spot if for
// a long (1) or short (2) fiber
unsigned layer = 1;
if (currentDepthL0 < 1.3) // first 22 cm = 1.3 lambda - only HFL
layer = 1;
else
layer = random->flatShoot() < 0.5 ? 1 : 2;
if (layer == 2)
newespot = 2. * espot;
if (eremaining - newespot < 0.)
newespot = eremaining;
// process transverse distribution
double prob = random->flatShoot();
int index = indexFinder(prob, Fhist);
double radius = rlamStep[i] * rhist[index] + random->flatShoot() * rbinsize; // in-bin
double phi = 2. * M_PI * random->flatShoot();
if (debug == 2)
LogDebug("FastCalorimetry") << std::endl
<< " FamosHFShower::compute "
<< " r = " << radius << " phi = " << phi << std::endl;
// add hit
theHcalHitMaker->setSpotEnergy(newespot);
theGrid->setSpotEnergy(newespot);
bool result;
if (ecal) {
result = theGrid->addHit(radius, phi, 0); // shouldn't get here !
if (debug == 2)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - "
<< " theGrid->addHit result = " << result << std::endl;
} else {
// PV assign espot to long/short fibers
result = theHcalHitMaker->addHit(radius, phi, layer);
if (debug == 2)
LogDebug("FastCalorimetry") << " FamosHFShower::compute - "
<< " theHcalHitMaker->addHit result = " << result << std::endl;
}
if (result) {
++nok;
eremaining -= newespot;
if (eremaining <= 0.)
converged = true;
// std::cout << "Transverse : " << nok << " "
// << " , E= " << newespot
// << " , Erem = " << eremaining
// << std::endl;
} else {
// std::cout << "WARNING : hit not added" << std::endl;
}
}
// end of tranverse simulation
//-----------------------------------------------------
if (count == infinity) {
status = false;
if (debug)
LogDebug("FastCalorimetry") << "*** FamosHFShower::compute "
<< " maximum number of"
<< " transverse points " << count << " is used !!!" << std::endl;
break;
}
if (debug)
LogDebug("FastCalorimetry") << " FamosHFShower::compute "
<< " long.step No." << i << " Ntry, Nok = " << count << " " << nok << std::endl;
} // end of longitudinal steps
} // end of no steps
return status;
}
int HFShower::indexFinder(double x, const std::vector<double>& Fhist) {
// binary search in the vector of doubles
int size = Fhist.size();
int curr = size / 2;
int step = size / 4;
int iter;
int prevdir = 0;
int actudir = 0;
for (iter = 0; iter < size; iter++) {
if (curr >= size || curr < 1)
LogWarning("FastCalorimetry") << " FamosHFShower::indexFinder - wrong current index = " << curr << " !!!"
<< std::endl;
if ((x <= Fhist[curr]) && (x > Fhist[curr - 1]))
break;
prevdir = actudir;
if (x > Fhist[curr]) {
actudir = 1;
} else {
actudir = -1;
}
if (prevdir * actudir < 0) {
if (step > 1)
step /= 2;
}
curr += actudir * step;
if (curr > size)
curr = size;
else {
if (curr < 1) {
curr = 1;
}
}
if (debug == 3)
LogDebug("FastCalorimetry") << " indexFinder - end of iter." << iter << " curr, F[curr-1], F[curr] = " << curr
<< " " << Fhist[curr - 1] << " " << Fhist[curr] << std::endl;
}
if (debug == 3)
LogDebug("FastCalorimetry") << " indexFinder x = " << x << " found index = " << curr - 1 << std::endl;
return curr - 1;
}
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