sim::SimEnergyDeposit Class Reference

Energy deposition in the active material. More...

#include <SimEnergyDeposit.h>

Public Types
using	Length_t = float
using	Point_t = geo::Point_t

Public Member Functions
	SimEnergyDeposit (int np=0, int ne=0, double sy=0, double e=0., geo::Point_t start={0., 0., 0.}, geo::Point_t end={0., 0., 0.}, double t0=0., double t1=0., int id=0, int pdg=0, int origTrackID=0)
int	NumPhotons () const
int	NumFPhotons () const
int	NumSPhotons () const
int	NumElectrons () const
double	ScintYieldRatio () const
double	Energy () const
geo::Point_t	Start () const
geo::Point_t	End () const
double	Time () const
int	TrackID () const
int	OrigTrackID () const
void	setTrackID (int id)
int	PdgCode () const
geo::Length_t	StartX () const
geo::Length_t	StartY () const
geo::Length_t	StartZ () const
double	StartT () const
geo::Length_t	EndX () const
geo::Length_t	EndY () const
geo::Length_t	EndZ () const
double	EndT () const
geo::Point_t	MidPoint () const
geo::Length_t	MidPointX () const
geo::Length_t	MidPointY () const
geo::Length_t	MidPointZ () const
geo::Length_t	X () const
geo::Length_t	Y () const
geo::Length_t	Z () const
double	T () const
double	T0 () const
double	T1 () const
double	E () const
geo::Length_t	StepLength () const
bool	operator< (const SimEnergyDeposit &rhs) const

Private Attributes
int	numPhotons
	of scintillation photons More...
int	numElectrons
	of ionization electrons More...
float	scintYieldRatio
	scintillation yield of LAr More...
float	edep
	energy deposition (MeV) More...
geo::Point_t	startPos
	positions in (cm) More...
geo::Point_t	endPos
double	startTime
	(ns) More...
double	endTime
	(ns) More...
int	trackID
	simulation track id More...
int	pdgCode
	pdg code of particle to avoid lookup by particle type later More...
int	origTrackID
	complementary simulation track id, kept true to G4 even for shower secondaries/tertiaries etc. More...

Detailed Description

Energy deposition in the active material.

The detector simulation (presently LArG4, which invokes Geant4) propagates particles through the detector in intervals of "steps". In Geant4, a step is normally defined by the smallest of the distance from the current position of the particle to the point where it enters a new volume boundary, the particle undergoes some "interesting" physics event, or the range of the particle due to its energy falls below a given limit.

In LArG4, an additional limit is applied: We force the steps to be small (typically 1/10th the wire spacing in the planes of the TPC) so we can process the energy deposited by each step into electron clusters.

The SimEnergyDeposit class defines what Geant4 truth information for each step is passed to the ionization -> sim::SimChannel conversion, and for the optical-photon -> sim::SimPhoton conversion.

William Seligman, Nevis Labs, 10/12/2017

Definition at line 42 of file SimEnergyDeposit.h.

Member Typedef Documentation

using sim::SimEnergyDeposit::Length_t = float

Definition at line 47 of file SimEnergyDeposit.h.

using sim::SimEnergyDeposit::Point_t = geo::Point_t

Definition at line 48 of file SimEnergyDeposit.h.

Constructor & Destructor Documentation

sim::SimEnergyDeposit::SimEnergyDeposit ( int  np = 0, int  ne = 0, double  sy = 0, double  e = 0., geo::Point_t  start = {0.,0.,0.}, geo::Point_t  end = {0.,0.,0.}, double  t0 = 0., double  t1 = 0., int  id = 0, int  pdg = 0, int  origTrackID = 0  )

inline

Definition at line 62 of file SimEnergyDeposit.h.

                                  {0.,0.,0.},
               geo::Point_t end = {0.,0.,0.},
               double t0 = 0.,
               double t1 = 0.,
               int id = 0,
               int pdg = 0,
               int origTrackID = 0)
      : numPhotons(np)
//      , numFPhotons(nfp)
//      , numSPhotons(nsp)
      , numElectrons(ne)
      , scintYieldRatio(sy)
      , edep(e)
      , startPos(start)
      , endPos(end)
      , startTime(t0)
      , endTime(t1)
      , trackID(id)
      , pdgCode(pdg)
      , origTrackID(origTrackID)
    {
    }

Member Function Documentation

double sim::SimEnergyDeposit::E ( ) const

inline

Definition at line 140 of file SimEnergyDeposit.h.

{ return edep; }

geo::Point_t sim::SimEnergyDeposit::End ( ) const

inline

Definition at line 103 of file SimEnergyDeposit.h.

{ return { endPos.X(), endPos.Y(), endPos.Z() }; }

double sim::SimEnergyDeposit::EndT ( ) const

inline

Definition at line 121 of file SimEnergyDeposit.h.

{ return endTime; }

geo::Length_t sim::SimEnergyDeposit::EndX ( ) const

inline

Definition at line 118 of file SimEnergyDeposit.h.

{ return endPos.X(); }

geo::Length_t sim::SimEnergyDeposit::EndY ( ) const

inline

Definition at line 119 of file SimEnergyDeposit.h.

{ return endPos.Y(); }

geo::Length_t sim::SimEnergyDeposit::EndZ ( ) const

inline

Definition at line 120 of file SimEnergyDeposit.h.

{ return endPos.Z(); }

double sim::SimEnergyDeposit::Energy ( ) const

inline

Definition at line 101 of file SimEnergyDeposit.h.

{ return edep; }

geo::Point_t sim::SimEnergyDeposit::MidPoint ( ) const

inline

Definition at line 124 of file SimEnergyDeposit.h.

                                {
      return {
        ( startPos.X() + endPos.X() )/2.
      , ( startPos.Y() + endPos.Y() )/2.
      , ( startPos.Z() + endPos.Z() )/2.
      };
    }

geo::Length_t sim::SimEnergyDeposit::MidPointX ( ) const

inline

Definition at line 131 of file SimEnergyDeposit.h.

{ return ( startPos.X() + endPos.X() )/2.; }

geo::Length_t sim::SimEnergyDeposit::MidPointY ( ) const

inline

Definition at line 132 of file SimEnergyDeposit.h.

{ return ( startPos.Y() + endPos.Y() )/2.; }

geo::Length_t sim::SimEnergyDeposit::MidPointZ ( ) const

inline

Definition at line 133 of file SimEnergyDeposit.h.

{ return ( startPos.Z() + endPos.Z() )/2.; }

int sim::SimEnergyDeposit::NumElectrons ( ) const

inline

Definition at line 99 of file SimEnergyDeposit.h.

{ return numElectrons; }

int sim::SimEnergyDeposit::NumFPhotons ( ) const

inline

Definition at line 97 of file SimEnergyDeposit.h.

{ return round(numPhotons * scintYieldRatio); }

int sim::SimEnergyDeposit::NumPhotons ( ) const

inline

Definition at line 96 of file SimEnergyDeposit.h.

{ return numPhotons; }

int sim::SimEnergyDeposit::NumSPhotons ( ) const

inline

Definition at line 98 of file SimEnergyDeposit.h.

{ return round(numPhotons * (1.0 - scintYieldRatio)); }

bool sim::SimEnergyDeposit::operator< ( const SimEnergyDeposit &  rhs ) const

inline

Definition at line 154 of file SimEnergyDeposit.h.

    {
      return trackID < rhs.trackID
      && startTime < rhs.startTime
      && startPos.Z() < rhs.startPos.Z()
      && startPos.Y() < rhs.startPos.Y()
      && startPos.X() < rhs.startPos.X()
      && edep > rhs.edep; // sort by _decreasing_ energy
    }

int sim::SimEnergyDeposit::OrigTrackID ( ) const

inline

Definition at line 106 of file SimEnergyDeposit.h.

{ return origTrackID; }

int sim::SimEnergyDeposit::PdgCode ( ) const

inline

Definition at line 108 of file SimEnergyDeposit.h.

{ return pdgCode; }

double sim::SimEnergyDeposit::ScintYieldRatio ( ) const

inline

Definition at line 100 of file SimEnergyDeposit.h.

{ return scintYieldRatio;}

void sim::SimEnergyDeposit::setTrackID ( int  id )

inline

Definition at line 107 of file SimEnergyDeposit.h.

{ trackID = id; }

geo::Point_t sim::SimEnergyDeposit::Start ( ) const

inline

Definition at line 102 of file SimEnergyDeposit.h.

{ return { startPos.X(), startPos.Y(), startPos.Z() }; }

double sim::SimEnergyDeposit::StartT ( ) const

inline

Definition at line 117 of file SimEnergyDeposit.h.

{ return startTime; }

geo::Length_t sim::SimEnergyDeposit::StartX ( ) const

inline

Definition at line 114 of file SimEnergyDeposit.h.

{ return startPos.X(); }

geo::Length_t sim::SimEnergyDeposit::StartY ( ) const

inline

Definition at line 115 of file SimEnergyDeposit.h.

{ return startPos.Y(); }

geo::Length_t sim::SimEnergyDeposit::StartZ ( ) const

inline

Definition at line 116 of file SimEnergyDeposit.h.

{ return startPos.Z(); }

geo::Length_t sim::SimEnergyDeposit::StepLength ( ) const

inline

Definition at line 145 of file SimEnergyDeposit.h.

{ return ( endPos - startPos ).R(); }

double sim::SimEnergyDeposit::T ( ) const

inline

Definition at line 137 of file SimEnergyDeposit.h.

{ return (startTime+endTime)/2.; }

double sim::SimEnergyDeposit::T0 ( ) const

inline

Definition at line 138 of file SimEnergyDeposit.h.

{ return startTime; }

double sim::SimEnergyDeposit::T1 ( ) const

inline

Definition at line 139 of file SimEnergyDeposit.h.

{ return endTime; }

double sim::SimEnergyDeposit::Time ( ) const

inline

Definition at line 104 of file SimEnergyDeposit.h.

{ return (startTime+endTime)/2.; }

int sim::SimEnergyDeposit::TrackID ( ) const

inline

Definition at line 105 of file SimEnergyDeposit.h.

{ return trackID; }

geo::Length_t sim::SimEnergyDeposit::X ( ) const

inline

Definition at line 134 of file SimEnergyDeposit.h.

{ return ( startPos.X() + endPos.X() )/2.; }

geo::Length_t sim::SimEnergyDeposit::Y ( ) const

inline

Definition at line 135 of file SimEnergyDeposit.h.

{ return ( startPos.Y() + endPos.Y() )/2.; }

geo::Length_t sim::SimEnergyDeposit::Z ( ) const

inline

Definition at line 136 of file SimEnergyDeposit.h.

{ return ( startPos.Z() + endPos.Z() )/2.; }

Member Data Documentation

float sim::SimEnergyDeposit::edep

private

energy deposition (MeV)

Definition at line 193 of file SimEnergyDeposit.h.

geo::Point_t sim::SimEnergyDeposit::endPos

private

Definition at line 195 of file SimEnergyDeposit.h.

double sim::SimEnergyDeposit::endTime

private

(ns)

Definition at line 197 of file SimEnergyDeposit.h.

int sim::SimEnergyDeposit::numElectrons

private

of ionization electrons

Definition at line 191 of file SimEnergyDeposit.h.

int sim::SimEnergyDeposit::numPhotons

private

of scintillation photons

Definition at line 188 of file SimEnergyDeposit.h.

int sim::SimEnergyDeposit::origTrackID

private

complementary simulation track id, kept true to G4 even for shower secondaries/tertiaries etc.

Definition at line 200 of file SimEnergyDeposit.h.

int sim::SimEnergyDeposit::pdgCode

private

pdg code of particle to avoid lookup by particle type later

Definition at line 199 of file SimEnergyDeposit.h.

float sim::SimEnergyDeposit::scintYieldRatio

private

scintillation yield of LAr

Definition at line 192 of file SimEnergyDeposit.h.

geo::Point_t sim::SimEnergyDeposit::startPos

private

positions in (cm)

Definition at line 194 of file SimEnergyDeposit.h.

double sim::SimEnergyDeposit::startTime

private

(ns)

Definition at line 196 of file SimEnergyDeposit.h.

int sim::SimEnergyDeposit::trackID

private

simulation track id

Definition at line 198 of file SimEnergyDeposit.h.

---

The documentation for this class was generated from the following file:

• SimEnergyDeposit.h