CSCCrossGap Class Reference

#include <CSCCrossGap.h>

Public Member Functions
void	addCluster (LocalPoint here)
void	addElectrons (int nelec=1)
void	addElectronToBack ()
void	addEloss (float eloss)
void	addStep (double step)
double	beta2 () const
	CSCCrossGap (double mass, float mom, LocalVector gap)
std::vector< int >	electrons () const
std::vector< float >	eLossPerStep () const
double	gamma () const
LocalVector	gapVector () const
std::vector< LocalPoint >	ionClusters () const
float	length () const
double	logGamma (double mass, float momentum)
double	logGamma ()
int	noOfClusters () const
int	noOfElectrons () const
int	noOfElosses () const
int	noOfSteps () const
std::vector< double >	stepLengths () const
LocalVector	unitVector () const
	~CSCCrossGap ()

Private Attributes
std::vector< LocalPoint >	clusters
std::vector< int >	electronsInClusters
std::vector< float >	elosses
double	loggam
std::vector< double >	steps
double	theBeta2
double	theGamma
LocalVector	theGap

Detailed Description

Class used to represent one CSC gas gap crossing by a charged track.

Author

Tim Cox

This is used by CSCCSCGasCollisions in the digitization of the CSCs. Actually this may NOT model the whole gas gap, but just the path length corresponding to a PSimHit in the gap (i.e. from the PSimHit 'entry point' to its 'exit point'). PSimHit's can have a pretty evanescent existence and I can't pretend to have a full understanding of their full range of characteristics. Yet another thing 'to be studied'.

Definition at line 22 of file CSCCrossGap.h.

Constructor & Destructor Documentation

CSCCrossGap::CSCCrossGap	(	double	mass,
		float	mom,
		LocalVector	gap
	)

iam = particle type in PDG code. mom = momentum of particle gap = space std::vector representing the hit entry and exit

Definition at line 6 of file CSCCrossGap.cc.

References length(), logGamma(), and LogTrace.

    : theBeta2(0.), theGamma(1.), loggam(0.), theGap(gap), clusters(), electronsInClusters(), steps(), elosses() {
  logGamma(mass, mom);
  LogTrace("CSCCrossGap") << "CSCCrossGap: simhit \n"
                          << "mass = " << mass << "GeV/c2, momentum = " << mom << " GeV/c, gap length = " << length()
                          << " cm \n";
}

CSCCrossGap::~CSCCrossGap ( )

inline

Definition at line 30 of file CSCCrossGap.h.

{};

Member Function Documentation

void CSCCrossGap::addCluster ( LocalPoint  here )

inline

Definition at line 41 of file CSCCrossGap.h.

References clusters.

Referenced by CSCGasCollisions::ionize().

{ clusters.push_back(here); }

void CSCCrossGap::addElectrons ( int  nelec = 1 )

inline

Definition at line 42 of file CSCCrossGap.h.

References electronsInClusters.

Referenced by CSCGasCollisions::ionize().

{ electronsInClusters.push_back(nelec); }

void CSCCrossGap::addElectronToBack ( )

inline

Definition at line 43 of file CSCCrossGap.h.

References electronsInClusters.

Referenced by CSCGasCollisions::ionize().

{ ++electronsInClusters.back(); }

void CSCCrossGap::addEloss ( float  eloss )

inline

Definition at line 46 of file CSCCrossGap.h.

References elosses.

Referenced by CSCGasCollisions::generateEnergyLoss().

{ elosses.push_back(eloss); }

void CSCCrossGap::addStep ( double  step )

inline

Definition at line 45 of file CSCCrossGap.h.

References steps.

Referenced by CSCGasCollisions::generateStep().

{ steps.push_back(step); }

double CSCCrossGap::beta2 ( ) const

inline

Definition at line 50 of file CSCCrossGap.h.

References theBeta2.

Referenced by CSCGasCollisions::generateEnergyLoss().

{ return theBeta2; }

std::vector<int> CSCCrossGap::electrons ( ) const

inline

Definition at line 34 of file CSCCrossGap.h.

References electronsInClusters.

Referenced by CSCGasCollisions::simulate(), and CSCGasCollisions::writeSummary().

{ return electronsInClusters; }

std::vector<float> CSCCrossGap::eLossPerStep ( ) const

inline

Definition at line 38 of file CSCCrossGap.h.

References elosses.

Referenced by CSCGasCollisions::writeSummary().

{ return elosses; }

double CSCCrossGap::gamma ( ) const

inline

Definition at line 51 of file CSCCrossGap.h.

References theGamma.

Referenced by CSCGasCollisions::generateEnergyLoss().

{ return theGamma; }

LocalVector CSCCrossGap::gapVector ( ) const

inline

Definition at line 52 of file CSCCrossGap.h.

References theGap.

{ return theGap; }

std::vector<LocalPoint> CSCCrossGap::ionClusters ( ) const

inline

Definition at line 32 of file CSCCrossGap.h.

References clusters.

Referenced by CSCGasCollisions::simulate(), and CSCGasCollisions::writeSummary().

{ return clusters; }

float CSCCrossGap::length ( void  ) const

inline

Definition at line 54 of file CSCCrossGap.h.

References PV3DBase< T, PVType, FrameType >::mag(), and theGap.

Referenced by CSCCrossGap(), and CSCGasCollisions::simulate().

{ return theGap.mag(); }

double CSCCrossGap::logGamma	(	double	mass,
		float	momentum
	)

Definition at line 14 of file CSCCrossGap.cc.

References log, loggam, LogTrace, SiStripPI::max, mathSSE::sqrt(), theBeta2, and theGamma.

Referenced by CSCGasCollisions::simulate().

                                                   {
  theGamma = sqrt((mom / mass) * (mom / mass) + 1.);
  theBeta2 = 1. - 1. / (theGamma * theGamma);
  LogTrace("CSCCrossGap") << "gamma = " << theGamma << ", beta2 = " << theBeta2
                          << ", beta*gamma = " << sqrt(theGamma * theGamma - 1.);
  ;

  // The lowest value in table (=theGammaBins[0]) is ln(1.1)=0.0953102
  // (Compensate later if lower)
  loggam = log(std::max(1.1, theGamma));  // F-P literal IS double by default!
  LogTrace("CSCCrossGap") << "logGamma = " << loggam;

  return loggam;
}

double CSCCrossGap::logGamma ( )

inline

Definition at line 49 of file CSCCrossGap.h.

References loggam.

Referenced by CSCCrossGap().

{ return loggam; }

int CSCCrossGap::noOfClusters ( ) const

inline

Definition at line 33 of file CSCCrossGap.h.

References clusters.

Referenced by CSCGasCollisions::ionize().

{ return clusters.size(); }

int CSCCrossGap::noOfElectrons ( ) const

inline

Definition at line 35 of file CSCCrossGap.h.

References electronsInClusters.

Referenced by CSCGasCollisions::ionize().

{ return electronsInClusters.size(); }

int CSCCrossGap::noOfElosses ( ) const

inline

Definition at line 39 of file CSCCrossGap.h.

References elosses.

{ return elosses.size(); }

int CSCCrossGap::noOfSteps ( ) const

inline

Definition at line 37 of file CSCCrossGap.h.

References steps.

{ return steps.size(); }

std::vector<double> CSCCrossGap::stepLengths ( ) const

inline

Definition at line 36 of file CSCCrossGap.h.

References steps.

Referenced by CSCGasCollisions::writeSummary().

{ return steps; }

LocalVector CSCCrossGap::unitVector ( ) const

inline

Definition at line 53 of file CSCCrossGap.h.

References theGap, and Vector3DBase< T, FrameTag >::unit().

Referenced by CSCGasCollisions::ionize(), and CSCGasCollisions::simulate().

{ return theGap.unit(); }

Member Data Documentation

std::vector<LocalPoint> CSCCrossGap::clusters

private

Definition at line 62 of file CSCCrossGap.h.

Referenced by addCluster(), ionClusters(), and noOfClusters().

std::vector<int> CSCCrossGap::electronsInClusters

private

Definition at line 63 of file CSCCrossGap.h.

Referenced by addElectrons(), addElectronToBack(), electrons(), and noOfElectrons().

std::vector<float> CSCCrossGap::elosses

private

Definition at line 65 of file CSCCrossGap.h.

Referenced by addEloss(), eLossPerStep(), and noOfElosses().

double CSCCrossGap::loggam

private

Definition at line 59 of file CSCCrossGap.h.

Referenced by logGamma().

std::vector<double> CSCCrossGap::steps

private

Definition at line 64 of file CSCCrossGap.h.

Referenced by addStep(), noOfSteps(), and stepLengths().

double CSCCrossGap::theBeta2

private

Definition at line 57 of file CSCCrossGap.h.

Referenced by beta2(), and logGamma().

double CSCCrossGap::theGamma

private

Definition at line 58 of file CSCCrossGap.h.

Referenced by gamma(), and logGamma().

LocalVector CSCCrossGap::theGap

private

Definition at line 60 of file CSCCrossGap.h.

Referenced by gapVector(), length(), and unitVector().