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SiPixelDigitizerAlgorithm.cc
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SiPixelDigitizerAlgorithm.cc
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//class SiPixelDigitizerAlgorithm SimTracker/SiPixelDigitizer/src/SiPixelDigitizerAlgoithm.cc
// Original Author Danek Kotlinski
// Ported in CMSSW by Michele Pioppi-INFN perugia
// Added DB capabilities by F.Blekman, Cornell University
// Created: Mon Sep 26 11:08:32 CEST 2005
// Add tof, change AddNoise to tracked. 4/06
// Change drift direction. 6/06 d.k.
// Add the statuis (non-rate dependent) inefficiency.
// -1 - no ineffciency
// 0 - static inefficency only
// 1,2 - low-lumi rate dependent inefficency added
// 10 - high-lumi inefficiency added
// Adopt the correct drift sign convetion from Morris Swartz. d.k. 8/06
// Add more complex misscalinbration, change kev/e to 3.61, diff=3.7,d.k.9/06
// Add the readout channel electronic noise. d.k. 3/07
// Lower the pixel noise from 500 to 175elec.
// Change the input threshold from noise units to electrons.
// Lower the amount of static dead pixels from 0.01 to 0.001.
// Modify to the new random number services. d.k. 5/07
// Protect against sigma=0 (delta tracks on the surface). d.k.5/07
// Change the TOF cut to lower and upper limit. d.k. 7/07
//
// July 2008: Split Lorentz Angle configuration in BPix/FPix (V. Cuplov)
// tanLorentzAngleperTesla_FPix=0.0912 and tanLorentzAngleperTesla_BPix=0.106
// Sept. 2008: Disable Pixel modules which are declared dead in the configuration python file. (V. Cuplov)
// Oct. 2008: Accessing/Reading the Lorentz angle from the DataBase instead of the cfg file. (V. Cuplov)
// Accessing dead modules from the DB. Implementation done and tested on a test.db
// Do not use this option for now. The PixelQuality Objects are not in the official DB yet.
// Feb. 2009: Split Fpix and Bpix threshold and use official numbers (V. Cuplov)
// ThresholdInElectrons_FPix = 2870 and ThresholdInElectrons_BPix = 3700
// update the electron to VCAL conversion using: VCAL_electrons = VCAL * 65.5 - 414
// Feb. 2009: Threshold gaussian smearing (V. Cuplov)
// March, 2009: changed DB access to *SimRcd objects (to de-couple the DB objects from reco chain) (F. Blekman)
// May, 2009: Pixel charge VCAL smearing. (V. Cuplov)
// November, 2009: new parameterization of the pixel response. (V. Cuplov)
// December, 2009: Fix issue with different compilers.
// October, 2010: Improvement: Removing single dead ROC (V. Cuplov)
// November, 2010: Bug fix in removing TBMB/A half-modules (V. Cuplov)
// February, 2011: Time improvement in DriftDirection() (J. Bashir Butt)
// June, 2011: Bug Fix for pixels on ROC edges in module_killing_DB() (J. Bashir Butt)
// February, 2018: Implement cluster charge reweighting (P. Schuetze, with code from A. Hazi)
#include <iostream>
#include <iomanip>
#include "SimGeneral/NoiseGenerators/interface/GaussianTailNoiseGenerator.h"
#include "DataFormats/SiPixelDigi/interface/PixelDigi.h"
#include "SimDataFormats/TrackerDigiSimLink/interface/PixelDigiSimLink.h"
#include "SimDataFormats/TrackingHit/interface/PSimHitContainer.h"
#include "SimTracker/Common/interface/SiG4UniversalFluctuation.h"
#include "SiPixelDigitizerAlgorithm.h"
#include <gsl/gsl_sf_erf.h>
#include "FWCore/Utilities/interface/RandomNumberGenerator.h"
#include "CLHEP/Random/RandGaussQ.h"
#include "CLHEP/Random/RandFlat.h"
//#include "PixelIndices.h"
#include "DataFormats/SiPixelDetId/interface/PixelSubdetector.h"
#include "DataFormats/TrackerCommon/interface/TrackerTopology.h"
#include "Geometry/Records/interface/IdealGeometryRecord.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "CalibTracker/SiPixelESProducers/interface/SiPixelGainCalibrationOfflineSimService.h"
// Accessing dead pixel modules from the DB:
#include "DataFormats/DetId/interface/DetId.h"
#include "CondFormats/SiPixelObjects/interface/GlobalPixel.h"
#include "CondFormats/DataRecord/interface/SiPixelQualityRcd.h"
#include "CondFormats/DataRecord/interface/SiPixelFedCablingMapRcd.h"
#include "CondFormats/DataRecord/interface/SiPixelLorentzAngleSimRcd.h"
#include "CondFormats/DataRecord/interface/SiPixelDynamicInefficiencyRcd.h"
#include "CondFormats/DataRecord/interface/SiPixel2DTemplateDBObjectRcd.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCablingMap.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCablingTree.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCabling.h"
#include "CondFormats/SiPixelObjects/interface/PixelIndices.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelLorentzAngle.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelQuality.h"
#include "CondFormats/SiPixelObjects/interface/PixelROC.h"
#include "CondFormats/SiPixelObjects/interface/LocalPixel.h"
#include "CondFormats/SiPixelObjects/interface/CablingPathToDetUnit.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelDynamicInefficiency.h"
#include "CondFormats/SiPixelObjects/interface/SiPixel2DTemplateDBObject.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFrameReverter.h"
#include "CondFormats/SiPixelObjects/interface/PixelFEDCabling.h"
#include "CondFormats/SiPixelObjects/interface/PixelFEDLink.h"
#include "DataFormats/FEDRawData/interface/FEDNumbering.h"
#include "SimDataFormats/PileupSummaryInfo/interface/PileupMixingContent.h"
#include "SimDataFormats/Track/interface/SimTrack.h"
// Geometry
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "Geometry/TrackerGeometryBuilder/interface/PixelGeomDetUnit.h"
#include "CondFormats/SiPixelObjects/interface/PixelROC.h"
using namespace edm;
using namespace sipixelobjects;
void SiPixelDigitizerAlgorithm::init(const edm::EventSetup& es) {
if(use_ineff_from_db_){// load gain calibration service fromdb...
theSiPixelGainCalibrationService_->setESObjects( es );
}
if(use_deadmodule_DB_) {
es.get<SiPixelQualityRcd>().get(SiPixelBadModule_);
}
if(use_LorentzAngle_DB_) {
// Get Lorentz angle from DB record
es.get<SiPixelLorentzAngleSimRcd>().get(SiPixelLorentzAngle_);
}
//gets the map and geometry from the DB (to kill ROCs)
es.get<SiPixelFedCablingMapRcd>().get(map_);
es.get<TrackerDigiGeometryRecord>().get(geom_);
// Read template files for charge reweighting
if (UseReweighting){
edm::ESHandle<SiPixel2DTemplateDBObject> SiPixel2DTemp_den;
es.get<SiPixel2DTemplateDBObjectRcd>().get("denominator",SiPixel2DTemp_den);
dbobject_den = SiPixel2DTemp_den.product();
edm::ESHandle<SiPixel2DTemplateDBObject> SiPixel2DTemp_num;
es.get<SiPixel2DTemplateDBObjectRcd>().get("numerator",SiPixel2DTemp_num);
dbobject_num = SiPixel2DTemp_num.product();
int numOfTemplates = dbobject_den->numOfTempl()+dbobject_num->numOfTempl();
templateStores_.reserve(numOfTemplates);
SiPixelTemplate2D::pushfile(*dbobject_den, templateStores_);
SiPixelTemplate2D::pushfile(*dbobject_num, templateStores_);
track.reserve(6);
}
}
//=========================================================================
SiPixelDigitizerAlgorithm::SiPixelDigitizerAlgorithm(const edm::ParameterSet& conf) :
_signal(),
makeDigiSimLinks_(conf.getUntrackedParameter<bool>("makeDigiSimLinks", true)),
use_ineff_from_db_(conf.getParameter<bool>("useDB")),
use_module_killing_(conf.getParameter<bool>("killModules")), // boolean to kill or not modules
use_deadmodule_DB_(conf.getParameter<bool>("DeadModules_DB")), // boolean to access dead modules from DB
use_LorentzAngle_DB_(conf.getParameter<bool>("LorentzAngle_DB")), // boolean to access Lorentz angle from DB
DeadModules(use_deadmodule_DB_ ? Parameters() : conf.getParameter<Parameters>("DeadModules")), // get dead module from cfg file
templ2D(templateStores_),
xdouble(TXSIZE),
ydouble(TYSIZE),
IDnum(conf.exists("TemplateIDnumerator")?conf.getParameter<int>("TemplateIDnumerator"):0),
IDden(conf.exists("TemplateIDdenominator")?conf.getParameter<int>("TemplateIDdenominator"):0),
// Common pixel parameters
// These are parameters which are not likely to be changed
GeVperElectron(3.61E-09), // 1 electron(3.61eV, 1keV(277e, mod 9/06 d.k.
Sigma0(0.00037), // Charge diffusion constant 7->3.7
Dist300(0.0300), // normalized to 300micron Silicon
alpha2Order(conf.getParameter<bool>("Alpha2Order")), // switch on/off of E.B effect
ClusterWidth(3.), // Charge integration spread on the collection plane
// get external parameters:
// To account for upgrade geometries do not assume the number
// of layers or disks.
NumberOfBarrelLayers(conf.exists("NumPixelBarrel")?conf.getParameter<int>("NumPixelBarrel"):3),
NumberOfEndcapDisks(conf.exists("NumPixelEndcap")?conf.getParameter<int>("NumPixelEndcap"):2),
// ADC calibration 1adc count(135e.
// Corresponds to 2adc/kev, 270[e/kev]/135[e/adc](2[adc/kev]
// Be carefull, this parameter is also used in SiPixelDet.cc to
// calculate the noise in adc counts from noise in electrons.
// Both defaults should be the same.
theElectronPerADC(conf.getParameter<double>("ElectronPerAdc")),
// ADC saturation value, 255(8bit adc.
//theAdcFullScale(conf.getUntrackedParameter<int>("AdcFullScale",255)),
theAdcFullScale(conf.getParameter<int>("AdcFullScale")),
theAdcFullScaleStack(conf.exists("AdcFullScaleStack")?conf.getParameter<int>("AdcFullScaleStack"):255),
// Noise in electrons:
// Pixel cell noise, relevant for generating noisy pixels
theNoiseInElectrons(conf.getParameter<double>("NoiseInElectrons")),
// Fill readout noise, including all readout chain, relevant for smearing
//theReadoutNoise(conf.getUntrackedParameter<double>("ReadoutNoiseInElec",500.)),
theReadoutNoise(conf.getParameter<double>("ReadoutNoiseInElec")),
// Pixel threshold in units of noise:
// thePixelThreshold(conf.getParameter<double>("ThresholdInNoiseUnits")),
// Pixel threshold in electron units.
theThresholdInE_FPix(conf.getParameter<double>("ThresholdInElectrons_FPix")),
theThresholdInE_BPix(conf.getParameter<double>("ThresholdInElectrons_BPix")),
theThresholdInE_BPix_L1(conf.exists("ThresholdInElectrons_BPix_L1")?conf.getParameter<double>("ThresholdInElectrons_BPix_L1"):theThresholdInE_BPix),
theThresholdInE_BPix_L2(conf.exists("ThresholdInElectrons_BPix_L2")?conf.getParameter<double>("ThresholdInElectrons_BPix_L2"):theThresholdInE_BPix),
// Add threshold gaussian smearing:
theThresholdSmearing_FPix(conf.getParameter<double>("ThresholdSmearing_FPix")),
theThresholdSmearing_BPix(conf.getParameter<double>("ThresholdSmearing_BPix")),
theThresholdSmearing_BPix_L1(conf.exists("ThresholdSmearing_BPix_L1")?conf.getParameter<double>("ThresholdSmearing_BPix_L1"):theThresholdSmearing_BPix),
theThresholdSmearing_BPix_L2(conf.exists("ThresholdSmearing_BPix_L2")?conf.getParameter<double>("ThresholdSmearing_BPix_L2"):theThresholdSmearing_BPix),
// electrons to VCAL conversion needed in misscalibrate()
electronsPerVCAL(conf.getParameter<double>("ElectronsPerVcal")),
electronsPerVCAL_Offset(conf.getParameter<double>("ElectronsPerVcal_Offset")),
electronsPerVCAL_L1(conf.exists("ElectronsPerVcal_L1")?conf.getParameter<double>("ElectronsPerVcal_L1"):electronsPerVCAL),
electronsPerVCAL_L1_Offset(conf.exists("ElectronsPerVcal_L1_Offset")?conf.getParameter<double>("ElectronsPerVcal_L1_Offset"):electronsPerVCAL_Offset),
//theTofCut 12.5, cut in particle TOD +/- 12.5ns
//theTofCut(conf.getUntrackedParameter<double>("TofCut",12.5)),
theTofLowerCut(conf.getParameter<double>("TofLowerCut")),
theTofUpperCut(conf.getParameter<double>("TofUpperCut")),
// Get the Lorentz angle from the cfg file:
tanLorentzAnglePerTesla_FPix(use_LorentzAngle_DB_ ? 0.0 : conf.getParameter<double>("TanLorentzAnglePerTesla_FPix")),
tanLorentzAnglePerTesla_BPix(use_LorentzAngle_DB_ ? 0.0 : conf.getParameter<double>("TanLorentzAnglePerTesla_BPix")),
// signal response new parameterization: split Fpix and BPix
FPix_p0(conf.getParameter<double>("FPix_SignalResponse_p0")),
FPix_p1(conf.getParameter<double>("FPix_SignalResponse_p1")),
FPix_p2(conf.getParameter<double>("FPix_SignalResponse_p2")),
FPix_p3(conf.getParameter<double>("FPix_SignalResponse_p3")),
BPix_p0(conf.getParameter<double>("BPix_SignalResponse_p0")),
BPix_p1(conf.getParameter<double>("BPix_SignalResponse_p1")),
BPix_p2(conf.getParameter<double>("BPix_SignalResponse_p2")),
BPix_p3(conf.getParameter<double>("BPix_SignalResponse_p3")),
// Add noise
addNoise(conf.getParameter<bool>("AddNoise")),
// Smear the pixel charge with a gaussian which RMS is a function of the
// pixel charge (Danek's study)
addChargeVCALSmearing(conf.getParameter<bool>("ChargeVCALSmearing")),
// Add noisy pixels
addNoisyPixels(conf.getParameter<bool>("AddNoisyPixels")),
// Fluctuate charge in track subsegments
fluctuateCharge(conf.getUntrackedParameter<bool>("FluctuateCharge",true)),
// Control the pixel inefficiency
AddPixelInefficiency(conf.getParameter<bool>("AddPixelInefficiency")),
// Add threshold gaussian smearing:
addThresholdSmearing(conf.getParameter<bool>("AddThresholdSmearing")),
// Get the constants for the miss-calibration studies
doMissCalibrate(conf.getParameter<bool>("MissCalibrate")), // Enable miss-calibration
theGainSmearing(conf.getParameter<double>("GainSmearing")), // sigma of the gain smearing
theOffsetSmearing(conf.getParameter<double>("OffsetSmearing")), //sigma of the offset smearing
// Add pixel radiation damage for upgrade studies
AddPixelAging(conf.getParameter<bool>("DoPixelAging")),
UseReweighting(conf.exists("UseReweighting")?conf.getParameter<bool>("UseReweighting"):true),
PrintClusters(conf.exists("PrintClusters")?conf.getParameter<bool>("PrintClusters"):false),
PrintTemplates(conf.exists("PrintTemplates")?conf.getParameter<bool>("PrintTemplates"):false),
// delta cutoff in MeV, has to be same as in OSCAR(0.030/cmsim=1.0 MeV
//tMax(0.030), // In MeV.
//tMax(conf.getUntrackedParameter<double>("deltaProductionCut",0.030)),
tMax(conf.getParameter<double>("deltaProductionCut")),
fluctuate(fluctuateCharge ? new SiG4UniversalFluctuation() : nullptr),
theNoiser(addNoise ? new GaussianTailNoiseGenerator() : nullptr),
calmap(doMissCalibrate ? initCal() : std::map<int,CalParameters,std::less<int> >()),
theSiPixelGainCalibrationService_(use_ineff_from_db_ ? new SiPixelGainCalibrationOfflineSimService(conf) : nullptr),
pixelEfficiencies_(conf, AddPixelInefficiency,NumberOfBarrelLayers,NumberOfEndcapDisks),
pixelAging_(conf,AddPixelAging,NumberOfBarrelLayers,NumberOfEndcapDisks)
{
LogInfo ("PixelDigitizer ") <<"SiPixelDigitizerAlgorithm constructed"
<<"Configuration parameters:"
<< "Threshold/Gain = "
<< "threshold in electron FPix = "
<< theThresholdInE_FPix
<< "threshold in electron BPix = "
<< theThresholdInE_BPix
<< "threshold in electron BPix Layer1 = "
<< theThresholdInE_BPix_L1
<< "threshold in electron BPix Layer2 = "
<< theThresholdInE_BPix_L2
<<" " << theElectronPerADC << " " << theAdcFullScale
<< " The delta cut-off is set to " << tMax
<< " pix-inefficiency "<<AddPixelInefficiency;
}
std::map<int, SiPixelDigitizerAlgorithm::CalParameters, std::less<int> >
SiPixelDigitizerAlgorithm::initCal() const {
using std::cerr;
using std::cout;
using std::endl;
std::map<int, SiPixelDigitizerAlgorithm::CalParameters, std::less<int> > calmap;
// Prepare for the analog amplitude miss-calibration
LogDebug ("PixelDigitizer ")
<< " miss-calibrate the pixel amplitude ";
const bool ReadCalParameters = false;
if(ReadCalParameters) { // Read the calibration files from file
// read the calibration constants from a file (testing only)
std::ifstream in_file; // data file pointer
char filename[80] = "phCalibrationFit_C0.dat";
in_file.open(filename, std::ios::in ); // in C++
if(in_file.bad()) {
cout << " File not found " << endl;
return calmap; // signal error
}
cout << " file opened : " << filename << endl;
char line[500];
for (int i = 0; i < 3; i++) {
in_file.getline(line, 500,'\n');
cout<<line<<endl;
}
cout << " test map" << endl;
float par0,par1,par2,par3;
int colid,rowid;
std::string name;
// Read MC tracks
for(int i=0;i<(52*80);i++) { // loop over tracks
in_file >> par0 >> par1 >> par2 >> par3 >> name >> colid >> rowid;
if(in_file.bad()) { // check for errors
cerr << "Cannot read data file" << endl;
return calmap;
}
if( in_file.eof() != 0 ) {
cerr << in_file.eof() << " " << in_file.gcount() << " "
<< in_file.fail() << " " << in_file.good() << " end of file "
<< endl;
return calmap;
}
//cout << " line " << i << " " <<par0<<" "<<par1<<" "<<par2<<" "<<par3<<" "
// <<colid<<" "<<rowid<<endl;
CalParameters onePix;
onePix.p0=par0;
onePix.p1=par1;
onePix.p2=par2;
onePix.p3=par3;
// Convert ROC pixel index to channel
int chan = PixelIndices::pixelToChannelROC(rowid,colid);
calmap.insert(std::pair<int,CalParameters>(chan,onePix));
// Testing the index conversion, can be skipped
std::pair<int,int> p = PixelIndices::channelToPixelROC(chan);
if(rowid!=p.first) cout<<" wrong channel row "<<rowid<<" "<<p.first<<endl;
if(colid!=p.second) cout<<" wrong channel col "<<colid<<" "<<p.second<<endl;
} // pixel loop in a ROC
cout << " map size " << calmap.size() <<" max "<<calmap.max_size() << " "
<<calmap.empty()<< endl;
// cout << " map size " << calmap.size() << endl;
// map<int,CalParameters,std::less<int> >::iterator ix,it;
// map<int,CalParameters,std::less<int> >::const_iterator ip;
// for (ix = calmap.begin(); ix != calmap.end(); ++ix) {
// int i = (*ix).first;
// std::pair<int,int> p = channelToPixelROC(i);
// it = calmap.find(i);
// CalParameters y = (*it).second;
// CalParameters z = (*ix).second;
// cout << i <<" "<<p.first<<" "<<p.second<<" "<<y.p0<<" "<<z.p0<<" "<<calmap[i].p0<<endl;
// //int dummy=0;
// //cin>>dummy;
// }
} // end if readparameters
return calmap;
} // end initCal()
//=========================================================================
SiPixelDigitizerAlgorithm::~SiPixelDigitizerAlgorithm() {
LogDebug ("PixelDigitizer")<<"SiPixelDigitizerAlgorithm deleted";
}
// Read DynIneff Scale factors from Configuration
SiPixelDigitizerAlgorithm::PixelEfficiencies::PixelEfficiencies(const edm::ParameterSet& conf, bool AddPixelInefficiency, int NumberOfBarrelLayers, int NumberOfEndcapDisks) {
// pixel inefficiency
// Don't use Hard coded values, read inefficiencies in from DB/python config or don't use any
int NumberOfTotLayers = NumberOfBarrelLayers + NumberOfEndcapDisks;
FPixIndex=NumberOfBarrelLayers;
if (AddPixelInefficiency){
FromConfig =
conf.exists("thePixelColEfficiency_BPix1") && conf.exists("thePixelColEfficiency_BPix2") && conf.exists("thePixelColEfficiency_BPix3") &&
conf.exists("thePixelColEfficiency_FPix1") && conf.exists("thePixelColEfficiency_FPix2") &&
conf.exists("thePixelEfficiency_BPix1") && conf.exists("thePixelEfficiency_BPix2") && conf.exists("thePixelEfficiency_BPix3") &&
conf.exists("thePixelEfficiency_FPix1") && conf.exists("thePixelEfficiency_FPix2") &&
conf.exists("thePixelChipEfficiency_BPix1") && conf.exists("thePixelChipEfficiency_BPix2") && conf.exists("thePixelChipEfficiency_BPix3") &&
conf.exists("thePixelChipEfficiency_FPix1") && conf.exists("thePixelChipEfficiency_FPix2");
if (NumberOfBarrelLayers==3) FromConfig = FromConfig && conf.exists("theLadderEfficiency_BPix1") && conf.exists("theLadderEfficiency_BPix2") && conf.exists("theLadderEfficiency_BPix3") &&
conf.exists("theModuleEfficiency_BPix1") && conf.exists("theModuleEfficiency_BPix2") && conf.exists("theModuleEfficiency_BPix3") &&
conf.exists("thePUEfficiency_BPix1") && conf.exists("thePUEfficiency_BPix2") && conf.exists("thePUEfficiency_BPix3") &&
conf.exists("theInnerEfficiency_FPix1") && conf.exists("theInnerEfficiency_FPix2") &&
conf.exists("theOuterEfficiency_FPix1") && conf.exists("theOuterEfficiency_FPix2") &&
conf.exists("thePUEfficiency_FPix_Inner") && conf.exists("thePUEfficiency_FPix_Outer") &&
conf.exists("theInstLumiScaleFactor");
if (NumberOfBarrelLayers>=4) FromConfig = FromConfig && conf.exists("thePixelColEfficiency_BPix4") &&
conf.exists("thePixelEfficiency_BPix4") && conf.exists("thePixelChipEfficiency_BPix4");
if (NumberOfEndcapDisks>=3) FromConfig = FromConfig && conf.exists("thePixelColEfficiency_FPix4") &&
conf.exists("thePixelEfficiency_FPix3") && conf.exists("thePixelChipEfficiency_FPix3");
if (FromConfig) {
LogInfo ("PixelDigitizer ") <<"The PixelDigitizer inefficiency configuration is read from the config file.\n";
theInstLumiScaleFactor = conf.getParameter<double>("theInstLumiScaleFactor");
int i=0;
thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_BPix1");
thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_BPix2");
thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_BPix3");
if (NumberOfBarrelLayers>=4){thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_BPix4");}
//
i=0;
thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_BPix1");
thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_BPix2");
thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_BPix3");
if (NumberOfBarrelLayers>=4){thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_BPix4");}
//
i=0;
thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_BPix1");
thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_BPix2");
thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_BPix3");
if (NumberOfBarrelLayers>=4){thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_BPix4");}
//
if (NumberOfBarrelLayers==3){
i=0;
theLadderEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theLadderEfficiency_BPix1");
theLadderEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theLadderEfficiency_BPix2");
theLadderEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theLadderEfficiency_BPix3");
if ( ((theLadderEfficiency_BPix[0].size()!=20) || (theLadderEfficiency_BPix[1].size()!=32) ||
(theLadderEfficiency_BPix[2].size()!=44)) && (NumberOfBarrelLayers==3) )
throw cms::Exception("Configuration") << "Wrong ladder number in efficiency config!";
//
i=0;
theModuleEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theModuleEfficiency_BPix1");
theModuleEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theModuleEfficiency_BPix2");
theModuleEfficiency_BPix[i++] = conf.getParameter<std::vector<double> >("theModuleEfficiency_BPix3");
if ( ((theModuleEfficiency_BPix[0].size()!=4) || (theModuleEfficiency_BPix[1].size()!=4) ||
(theModuleEfficiency_BPix[2].size()!=4)) && (NumberOfBarrelLayers==3) )
throw cms::Exception("Configuration") << "Wrong module number in efficiency config!";
//
thePUEfficiency.push_back(conf.getParameter<std::vector<double> >("thePUEfficiency_BPix1"));
thePUEfficiency.push_back(conf.getParameter<std::vector<double> >("thePUEfficiency_BPix2"));
thePUEfficiency.push_back(conf.getParameter<std::vector<double> >("thePUEfficiency_BPix3"));
if ( ((thePUEfficiency[0].empty()) || (thePUEfficiency[1].empty()) ||
(thePUEfficiency[2].empty())) && (NumberOfBarrelLayers==3) )
throw cms::Exception("Configuration") << "At least one PU efficiency (BPix) number is needed in efficiency config!";
}
// The next is needed for Phase2 Tracker studies
if (NumberOfBarrelLayers>=5){
if (NumberOfTotLayers>20){throw cms::Exception("Configuration") <<"SiPixelDigitizer was given more layers than it can handle";}
// For Phase2 tracker layers just set the outermost BPix inefficiency to 99.9% THESE VALUES ARE HARDCODED ALSO ELSEWHERE IN THIS FILE
for (int j=5 ; j<=NumberOfBarrelLayers ; j++){
thePixelColEfficiency[j-1]=0.999;
thePixelEfficiency[j-1]=0.999;
thePixelChipEfficiency[j-1]=0.999;
}
}
//
i=FPixIndex;
thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_FPix1");
thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_FPix2");
if (NumberOfEndcapDisks>=3){thePixelColEfficiency[i++] = conf.getParameter<double>("thePixelColEfficiency_FPix3");}
i=FPixIndex;
thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_FPix1");
thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_FPix2");
if (NumberOfEndcapDisks>=3){thePixelEfficiency[i++] = conf.getParameter<double>("thePixelEfficiency_FPix3");}
i=FPixIndex;
thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_FPix1");
thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_FPix2");
if (NumberOfEndcapDisks>=3){thePixelChipEfficiency[i++] = conf.getParameter<double>("thePixelChipEfficiency_FPix3");}
// The next is needed for Phase2 Tracker studies
if (NumberOfEndcapDisks>=4){
if (NumberOfTotLayers>20){throw cms::Exception("Configuration") <<"SiPixelDigitizer was given more layers than it can handle";}
// For Phase2 tracker layers just set the extra FPix disk inefficiency to 99.9% THESE VALUES ARE HARDCODED ALSO ELSEWHERE IN THIS FILE
for (int j=4+FPixIndex ; j<=NumberOfEndcapDisks+NumberOfBarrelLayers ; j++){
thePixelColEfficiency[j-1]=0.999;
thePixelEfficiency[j-1]=0.999;
thePixelChipEfficiency[j-1]=0.999;
}
}
//FPix Dynamic Inefficiency
if (NumberOfBarrelLayers==3){
i=FPixIndex;
theInnerEfficiency_FPix[i++] = conf.getParameter<double>("theInnerEfficiency_FPix1");
theInnerEfficiency_FPix[i++] = conf.getParameter<double>("theInnerEfficiency_FPix2");
i=FPixIndex;
theOuterEfficiency_FPix[i++] = conf.getParameter<double>("theOuterEfficiency_FPix1");
theOuterEfficiency_FPix[i++] = conf.getParameter<double>("theOuterEfficiency_FPix2");
thePUEfficiency.push_back(conf.getParameter<std::vector<double> >("thePUEfficiency_FPix_Inner"));
thePUEfficiency.push_back(conf.getParameter<std::vector<double> >("thePUEfficiency_FPix_Outer"));
if ( ((thePUEfficiency[3].empty()) || (thePUEfficiency[4].empty())) && (NumberOfEndcapDisks==2) )
throw cms::Exception("Configuration") << "At least one (FPix) PU efficiency number is needed in efficiency config!";
pu_scale.resize(thePUEfficiency.size());
}
}
else LogInfo ("PixelDigitizer ") <<"The PixelDigitizer inefficiency configuration is read from the database.\n";
}
// the first "NumberOfBarrelLayers" settings [0],[1], ... , [NumberOfBarrelLayers-1] are for the barrel pixels
// the next "NumberOfEndcapDisks" settings [NumberOfBarrelLayers],[NumberOfBarrelLayers+1], ... [NumberOfEndcapDisks+NumberOfBarrelLayers-1]
}
// Read DynIneff Scale factors from DB
void SiPixelDigitizerAlgorithm::init_DynIneffDB(const edm::EventSetup& es, const unsigned int& bunchspace){
if (AddPixelInefficiency&&!pixelEfficiencies_.FromConfig) {
if (bunchspace == 50) es.get<SiPixelDynamicInefficiencyRcd>().get("50ns",SiPixelDynamicInefficiency_);
else es.get<SiPixelDynamicInefficiencyRcd>().get(SiPixelDynamicInefficiency_);
pixelEfficiencies_.init_from_db(geom_, SiPixelDynamicInefficiency_);
}
}
void SiPixelDigitizerAlgorithm::PixelEfficiencies::init_from_db(const edm::ESHandle<TrackerGeometry>& geom, const edm::ESHandle<SiPixelDynamicInefficiency>& SiPixelDynamicInefficiency) {
theInstLumiScaleFactor = SiPixelDynamicInefficiency->gettheInstLumiScaleFactor();
const std::map<uint32_t, double>& PixelGeomFactorsDBIn = SiPixelDynamicInefficiency->getPixelGeomFactors();
const std::map<uint32_t, double>& ColGeomFactorsDB = SiPixelDynamicInefficiency->getColGeomFactors();
const std::map<uint32_t, double>& ChipGeomFactorsDB = SiPixelDynamicInefficiency->getChipGeomFactors();
const std::map<uint32_t, std::vector<double> >& PUFactors = SiPixelDynamicInefficiency->getPUFactors();
std::vector<uint32_t > DetIdmasks = SiPixelDynamicInefficiency->getDetIdmasks();
// Loop on all modules, initialize map for easy access
for( const auto& it_module : geom->detUnits()) {
if( dynamic_cast<PixelGeomDetUnit const*>(it_module)==nullptr) continue;
const DetId detid = it_module->geographicalId();
uint32_t rawid = detid.rawId();
PixelGeomFactors[rawid] = 1;
ColGeomFactors[rawid] = 1;
ChipGeomFactors[rawid] = 1;
PixelGeomFactorsROCStdPixels[rawid] = std::vector<double>(16,1);
PixelGeomFactorsROCBigPixels[rawid] = std::vector<double>(16,1);
}
// ROC level inefficiency for phase 1 (disentangle scale factors for big and std size pixels)
std::map<uint32_t, double> PixelGeomFactorsDB;
if (geom->isThere(GeomDetEnumerators::P1PXB)
|| geom->isThere(GeomDetEnumerators::P1PXEC)){
for (auto db_factor : PixelGeomFactorsDBIn){
int shift = DetId(db_factor.first).subdetId() ==
static_cast<int>(PixelSubdetector::PixelBarrel) ? BPixRocIdShift:FPixRocIdShift;
unsigned int rocMask = rocIdMaskBits << shift;
unsigned int rocId = (((db_factor.first) & rocMask) >> shift);
if (rocId != 0) {
rocId--;
unsigned int rawid = db_factor.first & (~rocMask);
const PixelGeomDetUnit * theGeomDet = dynamic_cast<const PixelGeomDetUnit*> (geom->idToDet(rawid));
PixelTopology const * topology = &(theGeomDet->specificTopology());
const int nPixelsInROC = topology->rowsperroc()*topology->colsperroc();
const int nBigPixelsInROC = 2*topology->rowsperroc()+topology->colsperroc()-2;
double factor = db_factor.second;
double badFraction = 1 - factor;
double bigPixelFraction = static_cast<double> (nBigPixelsInROC)/nPixelsInROC;
double stdPixelFraction = 1. - bigPixelFraction;
double badFractionBig = std::min(bigPixelFraction, badFraction);
double badFractionStd = std::max(0., badFraction - badFractionBig);
double badFractionBigReNormalized = badFractionBig/bigPixelFraction;
double badFractionStdReNormalized = badFractionStd/stdPixelFraction;
PixelGeomFactorsROCStdPixels[rawid][rocId] *= (1. - badFractionStdReNormalized);
PixelGeomFactorsROCBigPixels[rawid][rocId] *= (1. - badFractionBigReNormalized);
}
else{
PixelGeomFactorsDB[db_factor.first] = db_factor.second;
}
}
} // is Phase 1 geometry
else{
PixelGeomFactorsDB = PixelGeomFactorsDBIn;
}
// Loop on all modules, store module level geometrical scale factors
for( const auto& it_module : geom->detUnits()) {
if( dynamic_cast<PixelGeomDetUnit const*>(it_module)==nullptr) continue;
const DetId detid = it_module->geographicalId();
uint32_t rawid = detid.rawId();
for (auto db_factor : PixelGeomFactorsDB) if (matches(detid, DetId(db_factor.first), DetIdmasks)) PixelGeomFactors[rawid] *= db_factor.second;
for (auto db_factor : ColGeomFactorsDB) if (matches(detid, DetId(db_factor.first), DetIdmasks)) ColGeomFactors[rawid] *= db_factor.second;
for (auto db_factor : ChipGeomFactorsDB) if (matches(detid, DetId(db_factor.first), DetIdmasks)) ChipGeomFactors[rawid] *= db_factor.second;
}
// piluep scale factors are calculated once per event
// therefore vector index is stored in a map for each module that matches to a db_id
size_t i=0;
for (auto factor : PUFactors) {
const DetId db_id = DetId(factor.first);
for( const auto& it_module : geom->detUnits()) {
if( dynamic_cast<PixelGeomDetUnit const*>(it_module)==nullptr) continue;
const DetId detid = it_module->geographicalId();
if (!matches(detid, db_id, DetIdmasks)) continue;
if (iPU.count(detid.rawId())) {
throw cms::Exception("Database")<<"Multiple db_ids match to same module in SiPixelDynamicInefficiency DB Object";
} else {
iPU[detid.rawId()] = i;
}
}
thePUEfficiency.push_back(factor.second);
++i;
}
pu_scale.resize(thePUEfficiency.size());
}
bool SiPixelDigitizerAlgorithm::PixelEfficiencies::matches(const DetId& detid, const DetId& db_id, const std::vector<uint32_t >& DetIdmasks) {
if (detid.subdetId() != db_id.subdetId()) return false;
for (size_t i=0; i<DetIdmasks.size(); ++i) {
DetId maskid = DetId(DetIdmasks.at(i));
if (maskid.subdetId() != db_id.subdetId()) continue;
if ((detid.rawId()&maskid.rawId()) != (db_id.rawId()&maskid.rawId()) &&
(db_id.rawId()&maskid.rawId()) != DetId(db_id.det(), db_id.subdetId()).rawId()) return false;
}
return true;
}
SiPixelDigitizerAlgorithm::PixelAging::PixelAging(const edm::ParameterSet& conf, bool AddAging, int NumberOfBarrelLayers, int NumberOfEndcapDisks) {
// pixel aging
// Don't use Hard coded values, read aging in from python or don't use any
if(AddAging) {
int NumberOfTotLayers = NumberOfBarrelLayers + NumberOfEndcapDisks;
FPixIndex=NumberOfBarrelLayers;
int i=0;
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_BPix1");
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_BPix2");
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_BPix3");
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_BPix4");
// to be removed when Gaelle will have the phase2 digitizer
if (NumberOfBarrelLayers>=5){
if (NumberOfTotLayers>20){throw cms::Exception("Configuration") <<"SiPixelDigitizer was given more layers than it can handle";}
// For Phase2 tracker layers just set the outermost BPix aging 0.
for (int j=5 ; j<=NumberOfBarrelLayers ; j++){
thePixelPseudoRadDamage[j-1]=0.;
}
}
//
i=FPixIndex;
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_FPix1");
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_FPix2");
thePixelPseudoRadDamage[i++] = conf.getParameter<double>("thePixelPseudoRadDamage_FPix3");
//To be removed when Phase2 digitizer will be available
if (NumberOfEndcapDisks>=4){
if (NumberOfTotLayers>20){throw cms::Exception("Configuration") <<"SiPixelDigitizer was given more layers than it can handle";}
// For Phase2 tracker layers just set the extra FPix disk aging to 0. BE CAREFUL THESE VALUES ARE HARDCODED ALSO ELSEWHERE IN THIS FILE
for (int j=4+FPixIndex ; j<=NumberOfEndcapDisks+NumberOfBarrelLayers ; j++){
thePixelPseudoRadDamage[j-1]=0.;
}
}
}
// the first "NumberOfBarrelLayers" settings [0],[1], ... , [NumberOfBarrelLayers-1] are for the barrel pixels
// the next "NumberOfEndcapDisks" settings [NumberOfBarrelLayers],[NumberOfBarrelLayers+1], ... [NumberOfEndcapDisks+NumberOfBarrelLayers-1]
}
//=========================================================================
void SiPixelDigitizerAlgorithm::accumulateSimHits(std::vector<PSimHit>::const_iterator inputBegin,
std::vector<PSimHit>::const_iterator inputEnd,
const size_t inputBeginGlobalIndex,
const unsigned int tofBin,
const PixelGeomDetUnit* pixdet,
const GlobalVector& bfield,
const TrackerTopology *tTopo,
CLHEP::HepRandomEngine* engine) {
// produce SignalPoint's for all SimHit's in detector
// Loop over hits
uint32_t detId = pixdet->geographicalId().rawId();
size_t simHitGlobalIndex=inputBeginGlobalIndex; // This needs to stored to create the digi-sim link later
for (std::vector<PSimHit>::const_iterator ssbegin = inputBegin; ssbegin != inputEnd; ++ssbegin, ++simHitGlobalIndex) {
// skip hits not in this detector.
if((*ssbegin).detUnitId() != detId) {
continue;
}
#ifdef TP_DEBUG
LogDebug ("Pixel Digitizer")
<< (*ssbegin).particleType() << " " << (*ssbegin).pabs() << " "
<< (*ssbegin).energyLoss() << " " << (*ssbegin).tof() << " "
<< (*ssbegin).trackId() << " " << (*ssbegin).processType() << " "
<< (*ssbegin).detUnitId()
<< (*ssbegin).entryPoint() << " " << (*ssbegin).exitPoint() ;
#endif
std::vector<EnergyDepositUnit> ionization_points;
std::vector<SignalPoint> collection_points;
// fill collection_points for this SimHit, indpendent of topology
// Check the TOF cut
if ( ((*ssbegin).tof() - pixdet->surface().toGlobal((*ssbegin).localPosition()).mag()/30.)>= theTofLowerCut &&
((*ssbegin).tof()- pixdet->surface().toGlobal((*ssbegin).localPosition()).mag()/30.) <= theTofUpperCut ) {
primary_ionization(*ssbegin, ionization_points, engine); // fills _ionization_points
drift(*ssbegin, pixdet, bfield, tTopo, ionization_points, collection_points); // transforms _ionization_points to collection_points
// compute induced signal on readout elements and add to _signal
induce_signal(inputBegin, inputEnd, *ssbegin, simHitGlobalIndex, tofBin, pixdet, collection_points); // 1st 3 args needed only for SimHit<-->Digi link
} // end if
} // end for
}
//============================================================================
void SiPixelDigitizerAlgorithm::calculateInstlumiFactor(PileupMixingContent* puInfo){
//Instlumi scalefactor calculating for dynamic inefficiency
if (puInfo) {
const std::vector<int>& bunchCrossing = puInfo->getMix_bunchCrossing();
const std::vector<float>& TrueInteractionList = puInfo->getMix_TrueInteractions();
//const int bunchSpacing = puInfo->getMix_bunchSpacing();
int pui = 0, p = 0;
std::vector<int>::const_iterator pu;
std::vector<int>::const_iterator pu0 = bunchCrossing.end();
for (pu=bunchCrossing.begin(); pu!=bunchCrossing.end(); ++pu) {
if (*pu==0) {
pu0 = pu;
p = pui;
}
pui++;
}
if (pu0!=bunchCrossing.end()) {
for (size_t i=0, n = pixelEfficiencies_.thePUEfficiency.size(); i<n; i++) {
double instlumi = TrueInteractionList.at(p)*pixelEfficiencies_.theInstLumiScaleFactor;
double instlumi_pow=1.;
pixelEfficiencies_.pu_scale[i] = 0;
for (size_t j=0; j<pixelEfficiencies_.thePUEfficiency[i].size(); j++){
pixelEfficiencies_.pu_scale[i]+=instlumi_pow*pixelEfficiencies_.thePUEfficiency[i][j];
instlumi_pow*=instlumi;
}
}
}
}
else {
for (int i=0, n = pixelEfficiencies_.thePUEfficiency.size(); i<n; i++) {
pixelEfficiencies_.pu_scale[i] = 1.;
}
}
}
//============================================================================
void SiPixelDigitizerAlgorithm::digitize(const PixelGeomDetUnit* pixdet,
std::vector<PixelDigi>& digis,
std::vector<PixelDigiSimLink>& simlinks,
const TrackerTopology *tTopo,
CLHEP::HepRandomEngine* engine) {
// Pixel Efficiency moved from the constructor to this method because
// the information of the det are not available in the constructor
// Efficiency parameters. 0 - no inefficiency, 1-low lumi, 10-high lumi
uint32_t detID = pixdet->geographicalId().rawId();
const signal_map_type& theSignal = _signal[detID];
// Noise already defined in electrons
// thePixelThresholdInE = thePixelThreshold * theNoiseInElectrons ;
// Find the threshold in noise units, needed for the noiser.
float thePixelThresholdInE = 0.;
if(theNoiseInElectrons>0.){
if(pixdet->type().isTrackerPixel() && pixdet->type().isBarrel()){ // Barrel modules
int lay = tTopo->layer(detID);
if(addThresholdSmearing) {
if(pixdet->subDetector()==GeomDetEnumerators::SubDetector::PixelBarrel || pixdet->subDetector()==GeomDetEnumerators::SubDetector::P1PXB) {
if (lay==1) {
thePixelThresholdInE = CLHEP::RandGaussQ::shoot(engine, theThresholdInE_BPix_L1, theThresholdSmearing_BPix_L1); // gaussian smearing
} else if (lay==2) {
thePixelThresholdInE = CLHEP::RandGaussQ::shoot(engine, theThresholdInE_BPix_L2, theThresholdSmearing_BPix_L2); // gaussian smearing
} else {
thePixelThresholdInE = CLHEP::RandGaussQ::shoot(engine, theThresholdInE_BPix , theThresholdSmearing_BPix); // gaussian smearing
}
}
} else {
if(pixdet->subDetector()==GeomDetEnumerators::SubDetector::PixelBarrel || pixdet->subDetector()==GeomDetEnumerators::SubDetector::P1PXB) {
if (lay==1) {
thePixelThresholdInE = theThresholdInE_BPix_L1;
} else if (lay==2) {
thePixelThresholdInE = theThresholdInE_BPix_L2;
} else {
thePixelThresholdInE = theThresholdInE_BPix; // no smearing
}
}
}
} else if(pixdet->type().isTrackerPixel()) { // Forward disks modules
if(addThresholdSmearing) {
thePixelThresholdInE = CLHEP::RandGaussQ::shoot(engine, theThresholdInE_FPix, theThresholdSmearing_FPix); // gaussian smearing
} else {
thePixelThresholdInE = theThresholdInE_FPix; // no smearing
}
}
else {throw cms::Exception("NotAPixelGeomDetUnit") << "Not a pixel geomdet unit" << detID;}
}
#ifdef TP_DEBUG
const PixelTopology* topol=&pixdet->specificTopology();
int numColumns = topol->ncolumns(); // det module number of cols&rows
int numRows = topol->nrows();
// full detector thickness
float moduleThickness = pixdet->specificSurface().bounds().thickness();
LogDebug ("PixelDigitizer")
<< " PixelDigitizer "
<< numColumns << " " << numRows << " " << moduleThickness;
#endif
if(addNoise) add_noise(pixdet, thePixelThresholdInE/theNoiseInElectrons, engine); // generate noise
// Do only if needed
if((AddPixelInefficiency) && (!theSignal.empty()))
pixel_inefficiency(pixelEfficiencies_, pixdet, tTopo, engine); // Kill some pixels
if(use_ineff_from_db_ && (!theSignal.empty()))
pixel_inefficiency_db(detID);
if(use_module_killing_) {
if (use_deadmodule_DB_) { // remove dead modules using DB
module_killing_DB(detID);
} else { // remove dead modules using the list in cfg file
module_killing_conf(detID);
}
}
make_digis(thePixelThresholdInE, detID, pixdet, digis, simlinks, tTopo);
#ifdef TP_DEBUG
LogDebug ("PixelDigitizer") << "[SiPixelDigitizerAlgorithm] converted " << digis.size() << " PixelDigis in DetUnit" << detID;
#endif
}
//***********************************************************************/
// Generate primary ionization along the track segment.
// Divide the track into small sub-segments
void SiPixelDigitizerAlgorithm::primary_ionization(const PSimHit& hit, std::vector<EnergyDepositUnit>& ionization_points, CLHEP::HepRandomEngine* engine) const {
// Straight line approximation for trajectory inside active media
const float SegmentLength = 0.0010; //10microns in cm
float energy;
// Get the 3D segment direction vector
LocalVector direction = hit.exitPoint() - hit.entryPoint();
float eLoss = hit.energyLoss(); // Eloss in GeV
float length = direction.mag(); // Track length in Silicon
int NumberOfSegments = int ( length / SegmentLength); // Number of segments
if(NumberOfSegments < 1) NumberOfSegments = 1;
#ifdef TP_DEBUG
LogDebug ("Pixel Digitizer")
<< " enter primary_ionzation " << NumberOfSegments
<< " shift = "
<< (hit.exitPoint().x()-hit.entryPoint().x()) << " "
<< (hit.exitPoint().y()-hit.entryPoint().y()) << " "
<< (hit.exitPoint().z()-hit.entryPoint().z()) << " "
<< hit.particleType() <<" "<< hit.pabs() ;
#endif
float* elossVector = new float[NumberOfSegments]; // Eloss vector
if( fluctuateCharge ) {
//MP DA RIMUOVERE ASSOLUTAMENTE
int pid = hit.particleType();
//int pid=211; // assume it is a pion
float momentum = hit.pabs();
// Generate fluctuated charge points
fluctuateEloss(pid, momentum, eLoss, length, NumberOfSegments,
elossVector, engine);
}
ionization_points.resize( NumberOfSegments); // set size
// loop over segments
for ( int i = 0; i != NumberOfSegments; i++) {
// Divide the segment into equal length subsegments
Local3DPoint point = hit.entryPoint() +
float((i+0.5)/NumberOfSegments) * direction;
if( fluctuateCharge )
energy = elossVector[i]/GeVperElectron; // Convert charge to elec.
else
energy = hit.energyLoss()/GeVperElectron/float(NumberOfSegments);
EnergyDepositUnit edu( energy, point); //define position,energy point
ionization_points[i] = edu; // save
#ifdef TP_DEBUG
LogDebug ("Pixel Digitizer")
<< i << " " << ionization_points[i].x() << " "
<< ionization_points[i].y() << " "
<< ionization_points[i].z() << " "
<< ionization_points[i].energy();
#endif
} // end for loop
delete[] elossVector;
}
//******************************************************************************
// Fluctuate the charge comming from a small (10um) track segment.
// Use the G4 routine. For mip pions for the moment.
void SiPixelDigitizerAlgorithm::fluctuateEloss(int pid, float particleMomentum,
float eloss, float length,
int NumberOfSegs,float elossVector[],
CLHEP::HepRandomEngine* engine) const {
// Get dedx for this track
//float dedx;
//if( length > 0.) dedx = eloss/length;
//else dedx = eloss;
double particleMass = 139.6; // Mass in MeV, Assume pion
pid = std::abs(pid);
if(pid!=211) { // Mass in MeV
if(pid==11) particleMass = 0.511;
else if(pid==13) particleMass = 105.7;
else if(pid==321) particleMass = 493.7;
else if(pid==2212) particleMass = 938.3;
}
// What is the track segment length.
float segmentLength = length/NumberOfSegs;
// Generate charge fluctuations.
float de=0.;
float sum=0.;
double segmentEloss = (1000.*eloss)/NumberOfSegs; //eloss in MeV
for (int i=0;i<NumberOfSegs;i++) {
// material,*, momentum,energy,*, *, mass
//myglandz_(14.,segmentLength,2.,2.,dedx,de,0.14);
// The G4 routine needs momentum in MeV, mass in Mev, delta-cut in MeV,
// track segment length in mm, segment eloss in MeV
// Returns fluctuated eloss in MeV
double deltaCutoff = tMax; // the cutoff is sometimes redefined inside, so fix it.
de = fluctuate->SampleFluctuations(double(particleMomentum*1000.),
particleMass, deltaCutoff,
double(segmentLength*10.),
segmentEloss, engine )/1000.; //convert to GeV
elossVector[i]=de;
sum +=de;
}
if(sum>0.) { // If fluctuations give eloss>0.
// Rescale to the same total eloss
float ratio = eloss/sum;
for (int ii=0;ii<NumberOfSegs;ii++) elossVector[ii]= ratio*elossVector[ii];
} else { // If fluctuations gives 0 eloss
float averageEloss = eloss/NumberOfSegs;
for (int ii=0;ii<NumberOfSegs;ii++) elossVector[ii]= averageEloss;
}
return;
}
//*******************************************************************************
// Drift the charge segments to the sensor surface (collection plane)
// Include the effect of E-field and B-field
void SiPixelDigitizerAlgorithm::drift(const PSimHit& hit,
const PixelGeomDetUnit* pixdet,
const GlobalVector& bfield,
const TrackerTopology *tTopo,
const std::vector<EnergyDepositUnit>& ionization_points,
std::vector<SignalPoint>& collection_points) const {
#ifdef TP_DEBUG
LogDebug ("Pixel Digitizer") << " enter drift " ;
#endif
collection_points.resize(ionization_points.size()); // set size
LocalVector driftDir=DriftDirection(pixdet, bfield, hit.detUnitId()); // get the charge drift direction
if(driftDir.z() ==0.) {
LogWarning("Magnetic field") << " pxlx: drift in z is zero ";
return;
}
// tangent of Lorentz angle
//float TanLorenzAngleX = driftDir.x()/driftDir.z();
//float TanLorenzAngleY = 0.; // force to 0, driftDir.y()/driftDir.z();