#include <Pixel3DDigitizerAlgorithm.h>

Inheritance diagram for Pixel3DDigitizerAlgorithm:

Public Member Functions
std::vector< digitizerUtility::EnergyDepositUnit >	diffusion (const LocalPoint &pos, const float &ncarriers, const std::function< LocalVector(float, float)> &u_drift, const std::pair< float, float > pitches, const float &thickness) const

std::vector< digitizerUtility::SignalPoint >	drift (const PSimHit &hit, const Phase2TrackerGeomDetUnit *pixdet, const GlobalVector &bfield, const std::vector< digitizerUtility::EnergyDepositUnit > &ionization_points) const override

std::vector< digitizerUtility::SignalPoint >	driftFor3DSensors (const PSimHit &hit, const Phase2TrackerGeomDetUnit *pixdet, const GlobalVector &bfield, const std::vector< digitizerUtility::EnergyDepositUnit > &ionization_points, bool diffusion_activated) const

void	induce_signal (std::vector< PSimHit >::const_iterator inputBegin, const PSimHit &hit, const size_t hitIndex, const size_t firstHitIndex, const uint32_t tofBin, const Phase2TrackerGeomDetUnit *pixdet, const std::vector< digitizerUtility::SignalPoint > &collection_points) override

	Pixel3DDigitizerAlgorithm (const edm::ParameterSet &conf, edm::ConsumesCollector iC)

	~Pixel3DDigitizerAlgorithm () override

Public Member Functions inherited from PixelDigitizerAlgorithm
void	add_cross_talk (const Phase2TrackerGeomDetUnit *pixdet) override

void	init (const edm::EventSetup &es) override

bool	isAboveThreshold (const digitizerUtility::SimHitInfo *hitInfo, float charge, float thr) const override

void	module_killing_DB (const Phase2TrackerGeomDetUnit *pixdet) override

	PixelDigitizerAlgorithm (const edm::ParameterSet &conf, edm::ConsumesCollector iC)

bool	select_hit (const PSimHit &hit, double tCorr, double &sigScale) const override

	~PixelDigitizerAlgorithm () override

Public Member Functions inherited from Phase2TrackerDigitizerAlgorithm
virtual void	accumulateSimHits (const std::vector< PSimHit >::const_iterator inputBegin, const std::vector< PSimHit >::const_iterator inputEnd, const size_t inputBeginGlobalIndex, const uint32_t tofBin, const Phase2TrackerGeomDetUnit *pixdet, const GlobalVector &bfield)

virtual void	digitize (const Phase2TrackerGeomDetUnit pixdet, std::map< int, digitizerUtility::DigiSimInfo > &digi_map, const TrackerTopology tTopo)

virtual void	initializeEvent (CLHEP::HepRandomEngine &eng)

void	loadAccumulator (uint32_t detId, const std::map< int, float > &accumulator)

	Phase2TrackerDigitizerAlgorithm (const edm::ParameterSet &conf_common, const edm::ParameterSet &conf_specific, edm::ConsumesCollector iC)

virtual	~Phase2TrackerDigitizerAlgorithm ()

Private Member Functions
const bool	is_inside_n_column_ (const LocalPoint &p, const float &sensor_thickness) const

const bool	is_inside_ohmic_column_ (const LocalPoint &p, const std::pair< float, float > &pitch) const

Private Attributes
const edm::ESGetToken< SiPixelFedCablingMap, SiPixelFedCablingMapRcd >	fedCablingMapToken_

const edm::ESGetToken< TrackerGeometry, TrackerDigiGeometryRecord >	geomToken_

const float	np_column_gap_

const float	np_column_radius_

const float	ohm_column_radius_

edm::ESGetToken< SiPixelQuality, SiPixelQualityRcd >	siPixelBadModuleToken_

edm::ESGetToken< SiPixelLorentzAngle, SiPixelLorentzAngleSimRcd >	siPixelLorentzAngleToken_

Additional Inherited Members
Public Attributes inherited from PixelDigitizerAlgorithm
bool	apply_timewalk_

double	even_column_interchannelCoupling_next_column_

double	even_row_interchannelCoupling_next_row_

const edm::ESGetToken< TrackerGeometry, TrackerDigiGeometryRecord >	geomToken_

double	odd_column_interchannelCoupling_next_column_

double	odd_row_interchannelCoupling_next_row_

edm::ESGetToken< SiPixelQuality, SiPixelQualityRcd >	siPixelBadModuleToken_

edm::ESGetToken< SiPixelLorentzAngle, SiPixelLorentzAngleSimRcd >	siPixelLorentzAngleToken_

const TimewalkModel	timewalk_model_

Protected Types inherited from Phase2TrackerDigitizerAlgorithm
using	Frame = GloballyPositioned< double >

using	Parameters = std::vector< edm::ParameterSet >

using	signal_map_type = std::map< int, digitizerUtility::Ph2Amplitude, std::less< int > >

using	signalMaps = std::map< uint32_t, signal_map_type >

Protected Member Functions inherited from Phase2TrackerDigitizerAlgorithm
virtual void	add_noise (const Phase2TrackerGeomDetUnit *pixdet)

virtual void	add_noisy_cells (const Phase2TrackerGeomDetUnit *pixdet, float thePixelThreshold)

float	calcQ (float x)

int	convertSignalToAdc (uint32_t detID, float signal_in_elec, float threshold)

LocalVector	driftDirection (const Phase2TrackerGeomDetUnit *pixdet, const GlobalVector &bfield, const DetId &detId) const

virtual std::vector< float >	fluctuateEloss (int particleId, float momentum, float eloss, float length, int NumberOfSegments) const

virtual void	module_killing_conf (uint32_t detID)

virtual void	pixel_inefficiency (const SubdetEfficiencies &eff, const Phase2TrackerGeomDetUnit pixdet, const TrackerTopology tTopo)

virtual void	pixel_inefficiency_db (uint32_t detID)

virtual std::vector< digitizerUtility::EnergyDepositUnit >	primary_ionization (const PSimHit &hit) const

Protected Attributes inherited from Phase2TrackerDigitizerAlgorithm
signalMaps	_signal

const bool	addNoise_

const bool	addNoisyPixels_

const bool	addPixelInefficiency_

const bool	addThresholdSmearing_

const bool	addXtalk_

const bool	alpha2Order_

Parameters	badPixels_

const float	clusterWidth_

const Parameters	deadModules_

const std::unique_ptr< SiG4UniversalFluctuation >	fluctuate_

const bool	fluctuateCharge_

std::unique_ptr< CLHEP::RandGaussQ >	gaussDistribution_

const TrackerGeometry *	geom_

const float	GeVperElectron_

const float	interstripCoupling_

const bool	makeDigiSimLinks_

bool	pixelFlag_

const double	pseudoRadDamage_

const double	pseudoRadDamageRadius_

CLHEP::HepRandomEngine *	rengine_

const float	Sigma0_

const float	SigmaCoeff_

const SiPhase2OuterTrackerLorentzAngle *	siPhase2OTLorentzAngle_

const SiPixelQuality *	siPixelBadModule_

const SiPixelLorentzAngle *	siPixelLorentzAngle_

std::unique_ptr< CLHEP::RandGaussQ >	smearedThreshold_Barrel_

std::unique_ptr< CLHEP::RandGaussQ >	smearedThreshold_Endcap_

const SubdetEfficiencies	subdetEfficiencies_

const float	tanLorentzAnglePerTesla_Barrel_

const float	tanLorentzAnglePerTesla_Endcap_

const int	theAdcFullScale_

const float	theElectronPerADC_

const double	theHIPThresholdInE_Barrel_

const double	theHIPThresholdInE_Endcap_

const float	theNoiseInElectrons_

const std::unique_ptr< GaussianTailNoiseGenerator >	theNoiser_

const int	thePhase2ReadoutMode_

const float	theReadoutNoise_

const std::unique_ptr< SiPixelChargeReweightingAlgorithm >	theSiPixelChargeReweightingAlgorithm_

const std::unique_ptr< SiPixelGainCalibrationOfflineSimService >	theSiPixelGainCalibrationService_

const float	theThresholdInE_Barrel_

const float	theThresholdInE_Endcap_

const double	theThresholdSmearing_Barrel_

const double	theThresholdSmearing_Endcap_

const float	theTofLowerCut_

const float	theTofUpperCut_

const double	tMax_

const bool	use_deadmodule_DB_

const bool	use_ineff_from_db_

const bool	use_LorentzAngle_DB_

const bool	use_module_killing_

const bool	useChargeReweighting_

Detailed Description

Definition at line 29 of file Pixel3DDigitizerAlgorithm.h.

Constructor & Destructor Documentation

◆ Pixel3DDigitizerAlgorithm()

Pixel3DDigitizerAlgorithm::Pixel3DDigitizerAlgorithm	(	const edm::ParameterSet &	conf,
		edm::ConsumesCollector	iC
	)

Definition at line 20 of file Pixel3DDigitizerAlgorithm.cc.

References Phase2TrackerDigitizerAlgorithm::addPixelInefficiency_, Phase2TrackerDigitizerAlgorithm::pixelFlag_, Phase2TrackerDigitizerAlgorithm::theAdcFullScale_, Phase2TrackerDigitizerAlgorithm::theElectronPerADC_, Phase2TrackerDigitizerAlgorithm::theThresholdInE_Barrel_, Phase2TrackerDigitizerAlgorithm::theThresholdInE_Endcap_, and Phase2TrackerDigitizerAlgorithm::tMax_.

     : PixelDigitizerAlgorithm(conf, iC),
       np_column_radius_(
           (conf.getParameter<edm::ParameterSet>("Pixel3DDigitizerAlgorithm").getParameter<double>("NPColumnRadius")) *
           1.0_um),
       ohm_column_radius_(
           (conf.getParameter<edm::ParameterSet>("Pixel3DDigitizerAlgorithm").getParameter<double>("OhmicColumnRadius")) *
           1.0_um),
       np_column_gap_(
           (conf.getParameter<edm::ParameterSet>("Pixel3DDigitizerAlgorithm").getParameter<double>("NPColumnGap")) *
           1.0_um) {
   // XXX - NEEDED?
   pixelFlag_ = true;
 
   edm::LogInfo("Pixel3DDigitizerAlgorithm")
       << "Algorithm constructed \n"
       << "Configuration parameters:\n"
       << "\n*** Threshold"
       << "\n    Endcap = " << theThresholdInE_Endcap_ << " electrons"
       << "\n    Barrel = " << theThresholdInE_Barrel_ << " electrons"
       << "\n*** Gain"
       << "\n    Electrons per ADC:" << theElectronPerADC_ << "\n    ADC Full Scale: " << theAdcFullScale_
       << "\n*** The delta cut-off is set to " << tMax_ << "\n*** Pixel-inefficiency: " << addPixelInefficiency_;
 }

◆ ~Pixel3DDigitizerAlgorithm()

Pixel3DDigitizerAlgorithm::~Pixel3DDigitizerAlgorithm ( )

override

Definition at line 45 of file Pixel3DDigitizerAlgorithm.cc.

45 {}

Member Function Documentation

◆ diffusion()

std::vector< digitizerUtility::EnergyDepositUnit > Pixel3DDigitizerAlgorithm::diffusion	(	const LocalPoint &	pos,
		const float &	ncarriers,
		const std::function< LocalVector(float, float)> &	u_drift,
		const std::pair< float, float >	pitches,
		const float &	thickness
	)		const

Definition at line 70 of file Pixel3DDigitizerAlgorithm.cc.

References funct::abs(), createTree::dd, mps_fire::i, createfilelist::int, LogDebug, hcaltb::N_SIGMA, mathSSE::sqrt(), and HcalDetIdTransform::transform().

Referenced by driftFor3DSensors().

                                   {
   // FIXME -- DM : Note that with a 0.3 will be enough (if using current sigma formulae)
   //          With the current sigma, this value is dependent of the thickness,
   //          Note that this formulae is coming from planar sensors, a similar
   //          study with data will be needed to extract the sigma for 3D
   const float max_migration_radius = 0.4_um;
   // Need to know which axis is the relevant one
   int displ_ind = -1;
   float pitch = 0.0;
 
   // Check the group is near the edge of the pixel, so diffusion will
   // be relevant in order to migrate between pixel cells
   if (hpitches.first - std::abs(pos.x()) < max_migration_radius) {
     displ_ind = 0;
     pitch = hpitches.first;
   } else if (hpitches.second - std::abs(pos.y()) < max_migration_radius) {
     displ_ind = 1;
     pitch = hpitches.second;
   } else {
     // Nothing to do, too far away
     return std::vector<digitizerUtility::EnergyDepositUnit>();
   }
 
   // The new EnergyDeposits in the neighbour pixels
   // (defined by +1 to the right (first axis) and +1 to the up (second axis)) <-- XXX
   std::vector<digitizerUtility::EnergyDepositUnit> migrated_charge;
 
   // FIXME -- DM
   const float diffusion_step = 0.1_um;
 
   // The position while drifting
   std::vector<float> pos_moving({pos.x(), pos.y(), pos.z()});
   // The drifting: drift field and steps
   std::function<std::vector<float>(int)> do_step =
       [&pos_moving, &u_drift, diffusion_step](int i) -> std::vector<float> {
     auto dd = u_drift(pos_moving[0], pos_moving[1]);
     return std::vector<float>({i * diffusion_step * dd.x(), i * diffusion_step * dd.y(), i * diffusion_step * dd.z()});
   };
 
   LogDebug("Pixel3DDigitizerAlgorithm::diffusion")
       << "\nMax. radius from the pixel edge to migrate charge: " << max_migration_radius * 1.0_um_inv << " [um]"
       << "\nMigration axis: " << displ_ind
       << "\n(super-)Charge distance to the pixel edge: " << (pitch - pos_moving[displ_ind]) * 1.0_um_inv << " [um]";
 
   // How many sigmas (probably a configurable, to be decided not now)
   const float N_SIGMA = 3.0;
 
   // Start the drift and check every step
   // Some variables needed
   float current_carriers = ncarriers;
   std::vector<float> newpos({pos_moving[0], pos_moving[1], pos_moving[2]});
   float distance_edge = 0.0_um;
   // Current diffusion value
   const float sigma = 0.4_um;
   for (int i = 1;; ++i) {
     std::transform(pos_moving.begin(), pos_moving.end(), do_step(i).begin(), pos_moving.begin(), std::plus<float>());
     distance_edge = pitch - std::abs(pos_moving[displ_ind]);
     // Get the amount of charge on the neighbor pixel: note the
     // transformation to a Normal
     float migrated_e = current_carriers * 0.5 * (1.0 - std::erf(distance_edge / (sigma * std::sqrt(2.0))));
 
     LogDebug("(super-)charge diffusion") << "step-" << i << ", Current carriers Ne= " << current_carriers << ","
                                          << "r=(" << pos_moving[0] * 1.0_um_inv << ", " << pos_moving[1] * 1.0_um_inv
                                          << ", " << pos_moving[2] * 1.0_um_inv << ") [um], "
                                          << "Migrated charge: " << migrated_e;
 
     // Move the migrated charge
     current_carriers -= migrated_e;
 
     // Either far away from the edge or almost half of the carriers already migrated
     if (std::abs(distance_edge) >= max_migration_radius || current_carriers <= 0.5 * ncarriers) {
       break;
     }
 
     // Create the ionization point:
     // First update the newpos vector: the new charge position at the neighbouring pixel
     // is created in the same position as its "parent carriers"
     // except the direction of migration
     std::vector<float> newpos(pos_moving);
     // Let's create the new charge carriers around 3 sigmas away
     newpos[displ_ind] += std::copysign(N_SIGMA * sigma, newpos[displ_ind]);
     migrated_charge.push_back(digitizerUtility::EnergyDepositUnit(migrated_e, newpos[0], newpos[1], newpos[2]));
   }
   return migrated_charge;
 }

◆ drift()

std::vector< digitizerUtility::SignalPoint > Pixel3DDigitizerAlgorithm::drift	(	const PSimHit &	hit,
		const Phase2TrackerGeomDetUnit *	pixdet,
		const GlobalVector &	bfield,
		const std::vector< digitizerUtility::EnergyDepositUnit > &	ionization_points
	)		const

overridevirtual

Reimplemented from Phase2TrackerDigitizerAlgorithm.

Definition at line 167 of file Pixel3DDigitizerAlgorithm.cc.

References driftFor3DSensors().

                                                                                  {
   return driftFor3DSensors(hit, pixdet, bfield, ionization_points, true);
 }

◆ driftFor3DSensors()

std::vector< digitizerUtility::SignalPoint > Pixel3DDigitizerAlgorithm::driftFor3DSensors	(	const PSimHit &	hit,
		const Phase2TrackerGeomDetUnit *	pixdet,
		const GlobalVector &	bfield,
		const std::vector< digitizerUtility::EnergyDepositUnit > &	ionization_points,
		bool	diffusion_activated
	)		const

Definition at line 174 of file Pixel3DDigitizerAlgorithm.cc.

References Matriplex::atan2(), Surface::bounds(), funct::cos(), diffusion(), JetChargeProducer_cfi::exp, is_inside_n_column_(), is_inside_ohmic_column_(), Topology::localPosition(), LogDebug, CaloTowersParam_cfi::mc, PixelTopology::ncolumns(), B2GMonitoring_cff::nelectrons, np_column_radius_, PixelTopology::nrows(), PV3DBase< T, PVType, FrameType >::perp(), PixelTopology::pitch(), PixelTopology::pixel(), GloballyPositioned< T >::position(), Phase2TrackerDigitizerAlgorithm::pseudoRadDamage_, Phase2TrackerDigitizerAlgorithm::pseudoRadDamageRadius_, funct::sin(), GeomDet::specificSurface(), PixelGeomDetUnit::specificTopology(), mathSSE::sqrt(), GeomDet::surface(), tauSpinnerTable_cfi::theta, ppsPixelTopologyESSourceRun2_cfi::thickness, Bounds::thickness(), x, PV3DBase< T, PVType, FrameType >::x(), y, PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by drift().

                                     {
   // -- Current reference system is placed in the center of the module
   // -- The natural reference frame should be discribed taking advantatge of
   // -- the cylindrical nature of the pixel geometry -->
   // -- the new reference frame should be placed in the center of the n-column, and in the
   // -- surface of the ROC using cylindrical coordinates
 
   // Get ROC pitch, half_pitch and sensor thickness to be used to create the
   // proxy pixel cell reference frame
   const auto pitch = pixdet->specificTopology().pitch();
   const auto half_pitch = std::make_pair<float, float>(pitch.first * 0.5, pitch.second * 0.5);
   const float thickness = pixdet->specificSurface().bounds().thickness();
   const int nrows = pixdet->specificTopology().nrows();
   const int ncolumns = pixdet->specificTopology().ncolumns();
   const float pix_rounding = 0.99;
 
   // The maximum radial distance is going to be used to evaluate radiation damage XXX?
   const float max_radial_distance =
       std::sqrt(half_pitch.first * half_pitch.first + half_pitch.second * half_pitch.second);
 
   // All pixels are going to be translated to a proxy pixel cell (all pixels should behave
   // equally no matter their position w.r.t. the module) and describe the movements there
   // Define the center of the pixel local reference frame: the current cartesian local reference
   // frame is centered at half_width_x,half_width_y,half_thickness
   // XXX -- This info could be obtained at init/construction time?
   LocalPoint center_proxy_cell(half_pitch.first, half_pitch.second, -0.5 * thickness);
 
   LogDebug("Pixel3DDigitizerAlgorithm::drift")
       << "Pixel pitch:" << pitch.first * 1.0_um_inv << ", " << pitch.second * 1.0_um_inv << " [um]";
 
   // And the drift direction (assumed same for all the sensor)
   // XXX call the function which will return a functional
   std::function<LocalVector(float, float)> drift_direction = [](float x, float y) -> LocalVector {
     const float theta = std::atan2(y, x);
     return LocalVector(-std::cos(theta), -std::sin(theta), 0.0);
   };
   // The output
   std::vector<digitizerUtility::SignalPoint> collection_points;
   //collection_points.resize(ionization_points.size());
   collection_points.reserve(ionization_points.size());
 
   // Radiation damage limit of application
   // (XXX: No sense for 3D, let this be until decided what algorithm to use)
   const float RAD_DAMAGE = 0.001;
 
   for (const auto& super_charge : ionization_points) {
     // Extract the pixel cell
     auto current_pixel = pixdet->specificTopology().pixel(LocalPoint(super_charge.x(), super_charge.y()));
     // `pixel` function does not check to be in the ROC bounds,
     // so check it here and fix potential rounding problems.
     // Careful, this is assuming a rounding problem (1 unit), more than 1 pixel
     // away is probably showing some backward problem worth it to track.
     // This is also correcting out of bounds migrated charge from diffusion.
     // The charge will be moved to the edge of the row/column.
     current_pixel.first = std::clamp(current_pixel.first, float(0.0), (nrows - 1) + pix_rounding);
     current_pixel.second = std::clamp(current_pixel.second, float(0.0), (ncolumns - 1) + pix_rounding);
 
     const auto current_pixel_int = std::make_pair(std::floor(current_pixel.first), std::floor(current_pixel.second));
 
     // Convert to the 1x1 proxy pixel cell (pc), where all calculations are going to be
     // performed. The pixel is scaled to the actual pitch
     const auto relative_position_at_pc =
         std::make_pair((current_pixel.first - current_pixel_int.first) * pitch.first,
                        (current_pixel.second - current_pixel_int.second) * pitch.second);
 
     // Changing the reference frame to the proxy pixel cell
     LocalPoint position_at_pc(relative_position_at_pc.first - center_proxy_cell.x(),
                               relative_position_at_pc.second - center_proxy_cell.y(),
                               super_charge.z() - center_proxy_cell.z());
 
     LogDebug("Pixel3DDigitizerAlgorithm::drift")
         << "(super-)Charge\nlocal position: (" << super_charge.x() * 1.0_um_inv << ", " << super_charge.y() * 1.0_um_inv
         << ", " << super_charge.z() * 1.0_um_inv << ") [um]"
         << "\nMeasurement Point (row,column) (" << current_pixel.first << ", " << current_pixel.second << ")"
         << "\nProxy pixel-cell frame (centered at  left-back corner): (" << relative_position_at_pc.first * 1.0_um_inv
         << ", " << relative_position_at_pc.second * 1.0_um_inv << ") [um]"
         << "\nProxy pixel-cell frame (centered at n-column): (" << position_at_pc.x() * 1.0_um_inv << ", "
         << position_at_pc.y() * 1.0_um_inv << ") [um] "
         << "\nNe=" << super_charge.energy() << " electrons";
 
     // Check if the point is inside any of the column --> no charge was actually created then
     if (is_inside_n_column_(position_at_pc, thickness) || is_inside_ohmic_column_(position_at_pc, half_pitch)) {
       LogDebug("Pixel3DDigitizerAlgorithm::drift") << "Remove charge,  inside the n-column or p-column!!";
       continue;
     }
 
     float nelectrons = super_charge.energy();
     // XXX -- Diffusion: using the center frame
     if (diffusion_activated) {
       auto migrated_charges = diffusion(position_at_pc, super_charge.energy(), drift_direction, half_pitch, thickness);
       for (auto& mc : migrated_charges) {
         // Remove the migrated charges
         nelectrons -= mc.energy();
         // and convert back to the pixel ref. system
         // Low-left origin/pitch -> relative within the pixel (a)
         // Adding the pixel
         const float pixel_x = current_pixel_int.first + (mc.x() + center_proxy_cell.x()) / pitch.first;
         const float pixel_y = current_pixel_int.second + (mc.y() + center_proxy_cell.y()) / pitch.second;
         const auto lp = pixdet->specificTopology().localPosition(MeasurementPoint(pixel_x, pixel_y));
         // Remember: the drift function will move the reference system to the top. We need to subtract
         // (center_proxy_cell.z() is a constant negative value) what we previously added in order to
         // avoid a double translation when calling the drift function below the drift function
         // initially considers the reference system centered in the module at half thickness)
         mc.migrate_position(LocalPoint(lp.x(), lp.y(), mc.z() + center_proxy_cell.z()));
       }
       if (!migrated_charges.empty()) {
         LogDebug("Pixel3DDigitizerAlgorithm::drift") << "****************"
                                                      << "MIGRATING (super-)charges"
                                                      << "****************";
         // Drift this charges on the other pixel
         auto mig_colpoints = driftFor3DSensors(hit, pixdet, bfield, migrated_charges, false);
         collection_points.insert(std::end(collection_points), mig_colpoints.begin(), mig_colpoints.end());
         LogDebug("Pixel3DDigitizerAlgorithm::drift") << "*****************"
                                                      << "DOME MIGRATION"
                                                      << "****************";
       }
     }
 
     // Perform the drift, and check a potential lost of carriers because
     // they reach the pasivation region (-z < thickness/2)
     // XXX: not doing nothing, the carriers reach the electrode surface,
     const float drift_distance = position_at_pc.perp() - np_column_radius_;
 
     // Insert a charge loss due to Rad Damage here
     // XXX: ??
     float energyOnCollector = nelectrons;
     // FIXME: is this correct?  Not for 3D...
 
     if (pseudoRadDamage_ >= RAD_DAMAGE) {
       const float module_radius = pixdet->surface().position().perp();
       if (module_radius <= pseudoRadDamageRadius_) {
         const float kValue = pseudoRadDamage_ / (module_radius * module_radius);
         energyOnCollector = energyOnCollector * std::exp(-1.0 * kValue * drift_distance / max_radial_distance);
       }
     }
     LogDebug("Pixel3DDigitizerAlgorithm::drift")
         << "Drift distance = " << drift_distance * 1.0_um_inv << " [um], "
         << "Initial electrons = " << super_charge.energy()
         << " [electrons], Electrons after loss/diff= " << energyOnCollector << " [electrons] ";
     // Load the Charge distribution parameters
     // XXX -- probably makes no sense the SignalPoint anymore...
     collection_points.push_back(digitizerUtility::SignalPoint(
         current_pixel_int.first, current_pixel_int.second, 0.0, 0.0, hit.tof(), energyOnCollector));
   }
 
   return collection_points;
 }

◆ induce_signal()

void Pixel3DDigitizerAlgorithm::induce_signal	(	std::vector< PSimHit >::const_iterator	inputBegin,
		const PSimHit &	hit,
		const size_t	hitIndex,
		const size_t	firstHitIndex,
		const uint32_t	tofBin,
		const Phase2TrackerGeomDetUnit *	pixdet,
		const std::vector< digitizerUtility::SignalPoint > &	collection_points
	)

overridevirtual

Reimplemented from Phase2TrackerDigitizerAlgorithm.

Definition at line 331 of file Pixel3DDigitizerAlgorithm.cc.

References Phase2TrackerDigitizerAlgorithm::_signal, c_inv, hcalRecHitTable_cff::detId, GeomDet::geographicalId(), LogDebug, mag(), Phase2TrackerDigitizerAlgorithm::makeDigiSimLinks_, Phase2TrackerDigitizerAlgorithm::pixelFlag_, Phase2TrackerDigi::pixelToChannel(), PixelDigi::pixelToChannel(), pixelDetails::pixelToChannel(), DiDispStaMuonMonitor_cfi::pt, DetId::rawId(), GeomDet::surface(), and Surface::toGlobal().

                                                                                                                {
   // X  - Rows, Left-Right
   // Y  - Columns, Down-Up
   const uint32_t detId = pixdet->geographicalId().rawId();
   // Accumulated signal at each channel of this detector
   signal_map_type& the_signal = _signal[detId];
 
   // Choose the proper pixel-to-channel converter
   std::function<int(int, int)> pixelToChannel =
       pixelFlag_ ? PixelDigi::pixelToChannel
                  : static_cast<std::function<int(int, int)> >(Phase2TrackerDigi::pixelToChannel);
 
   // Iterate over collection points on the collection plane
   for (const auto& pt : collection_points) {
     // Extract corresponding channel (position is already given in pixel indices)
     const int channel = pixelToChannel(pt.position().x(), pt.position().y());
 
     float corr_time = hit.tof() - pixdet->surface().toGlobal(hit.localPosition()).mag() * c_inv;
     if (makeDigiSimLinks_) {
       the_signal[channel] +=
           digitizerUtility::Ph2Amplitude(pt.amplitude(), &hit, pt.amplitude(), corr_time, hitIndex, tofBin);
     } else {
       the_signal[channel] += digitizerUtility::Ph2Amplitude(pt.amplitude(), nullptr, pt.amplitude());
     }
 
     LogDebug("Pixel3DDigitizerAlgorithm")
         << " Induce charge at row,col:" << pt.position() << " N_electrons:" << pt.amplitude() << " [Channel:" << channel
         << "]\n   [Accumulated signal in this channel:" << the_signal[channel].ampl() << "] "
         << " Global index linked PSimHit:" << hitIndex;
   }
 }

◆ is_inside_n_column_()

const bool Pixel3DDigitizerAlgorithm::is_inside_n_column_	(	const LocalPoint &	p,
		const float &	sensor_thickness
	)		const

private

Definition at line 47 of file Pixel3DDigitizerAlgorithm.cc.

References np_column_gap_, np_column_radius_, and AlCaHLTBitMon_ParallelJobs::p.

Referenced by driftFor3DSensors().

                                                                                                                   {
   // The insensitive volume of the column: sensor thickness - column gap distance
   return (p.perp() <= np_column_radius_ && p.z() <= (sensor_thickness - np_column_gap_));
 }

◆ is_inside_ohmic_column_()

const bool Pixel3DDigitizerAlgorithm::is_inside_ohmic_column_	(	const LocalPoint &	p,
		const std::pair< float, float > &	pitch
	)		const

private

Definition at line 52 of file Pixel3DDigitizerAlgorithm.cc.

References ohm_column_radius_, and AlCaHLTBitMon_ParallelJobs::p.

Referenced by driftFor3DSensors().

                                                                                                              {
   // The four corners of the cell
   return ((p - LocalVector(half_pitch.first, half_pitch.second, 0)).perp() <= ohm_column_radius_) ||
          ((p - LocalVector(-half_pitch.first, half_pitch.second, 0)).perp() <= ohm_column_radius_) ||
          ((p - LocalVector(half_pitch.first, -half_pitch.second, 0)).perp() <= ohm_column_radius_) ||
          ((p - LocalVector(-half_pitch.first, -half_pitch.second, 0)).perp() <= ohm_column_radius_);
 }