ARICHSimulationPar Class Reference

The Class for ARICH simulation parameters. More...

#include <ARICHSimulationPar.h>

Inheritance diagram for ARICHSimulationPar:

Collaboration diagram for ARICHSimulationPar:

Public Member Functions
	ARICHSimulationPar ()
	Default constructor.
double	getQE (double e) const
	Get QE at given energy. More...
double	getColEff () const
	Get HAPD collection efficiency. More...
double	getQEScaling () const
	Get QE scaling factor for photons internally reflected in HAPD window.
double	getWindowAbsorbtion () const
	Get absorbtion probability for photons internally reflected in HAPD window.
double	getChipNegativeCrosstalk () const
	Get factor to suppress p.e. More...
double	getNBkgHits () const
	Get number of flat background hits/hapd/event to be added in digitizer.
void	setQECurve (float lambdaFirst, float lambdaStep, const std::vector< float > &qe)
	Set QE curve. More...
void	setNBkgHits (float nbkg)
	Set number of flat background hits/hapd/event to be added in digitizer. More...
void	setQEScaling (double qescale)
	Set QE scaling factor for photons internally reflected in HAPD window. More...
void	setWindowAbsorbtion (double abs)
	Set absorbtion probability for photons internally reflected in HAPD window. More...
void	setChipNegativeCrosstalk (double cross)
	Set factor to suppress p.e. More...
void	setCollectionEff (double colEff)
	Set HAPD collection efficiency. More...
void	setPeakQE (double peak)
	Set peak QE value (for HAPD with maximal QE, at later stage HAPD dependent scaling is done) More...
void	print () const
	print class content

Private Member Functions
	ClassDef (ARICHSimulationPar, 2)
	ClassDef, must be the last term before the closing {}.

Private Attributes
float	m_qeScale = 0
	QE scale factor for photons internally reflected in HAPD window.
float	m_windowAbsorbtion = 0
	absorbtion probability for photons internally reflected in HAPD window
float	m_chipNegativeCrosstalk = 0
	to simulate opposite polarity crosstalk among channels on chip
float	m_peakQE = 0
	maximal peak QE of all HAPDs
std::vector< float >	m_qe
	quantum efficiency curve
float	m_colEff = 0
	collection efficiency
float	m_lambdaFirst = 0
	wavelength [nm]: first QE data point
float	m_lambdaStep = 0
	wavelength [nm]: step
float	m_nBkgHits = 0
	number if flat background hits/hapd/event to be added in digitizer

Detailed Description

The Class for ARICH simulation parameters.

This class provides ARICH paramters for simulation, such as QE vs. wavelength curve for HAPDs, parameters to describe negative polarity crosstalk of channels of APD, ...

Definition at line 34 of file ARICHSimulationPar.h.

Member Function Documentation

getChipNegativeCrosstalk()

double getChipNegativeCrosstalk ( ) const

inline

Get factor to suppress p.e.

detection efficiency due to negative polarity crosstalk among chip channels

Definition at line 67 of file ARICHSimulationPar.h.

getColEff()

double getColEff ( ) const

inline

Get HAPD collection efficiency.

Returns

collection efficiency

Definition at line 52 of file ARICHSimulationPar.h.

getQE()

double getQE

(

double

e

)

const

Get QE at given energy.

Parameters

e	photon energy [eV]

Returns

QE

Definition at line 19 of file ARICHSimulationPar.cc.

{
  if (e < 0.001) return 0;
  if (m_qe.size() == 0) B2ERROR("ARICHSimulationPar: QE curve not initialized!");
  double dlam = 1240 / e - m_lambdaFirst;
 
  int i = int(dlam / m_lambdaStep);
  if (i < 0) i = 0;
  if (i > int(m_qe.size()) - 2) return 0;
 
  // linear interpolation
  double qe = m_qe[i] + (m_qe[i + 1] - m_qe[i]) / m_lambdaStep * (dlam - i * m_lambdaStep);
  return qe * m_peakQE;
}

setChipNegativeCrosstalk()

void setChipNegativeCrosstalk ( double  cross )

inline

Set factor to suppress p.e.

detection efficiency due to negative polarity crosstalk among chip channels

Parameters

cross

level of negative crosstalk

Definition at line 104 of file ARICHSimulationPar.h.

setCollectionEff()

void setCollectionEff ( double  colEff )

inline

Set HAPD collection efficiency.

Parameters

colEff

collection efficiency

Definition at line 110 of file ARICHSimulationPar.h.

setNBkgHits()

void setNBkgHits ( float  nbkg )

inline

Set number of flat background hits/hapd/event to be added in digitizer.

Parameters

number

of background hits/hapd/event

Definition at line 86 of file ARICHSimulationPar.h.

setPeakQE()

void setPeakQE ( double  peak )

inline

Set peak QE value (for HAPD with maximal QE, at later stage HAPD dependent scaling is done)

Parameters

peak	QE at peak

Definition at line 116 of file ARICHSimulationPar.h.

setQECurve()

void setQECurve	(	float	lambdaFirst,
		float	lambdaStep,
		const std::vector< float > &	qe
	)

Set QE curve.

Parameters

lambdaFirst	curve starting wavelength in nm
lambdaStep	step between points
qe	vector of QE values

Definition at line 34 of file ARICHSimulationPar.cc.

setQEScaling()

void setQEScaling ( double  qescale )

inline

Set QE scaling factor for photons internally reflected in HAPD window.

Parameters

qescale

QE scaling

Definition at line 92 of file ARICHSimulationPar.h.

setWindowAbsorbtion()

void setWindowAbsorbtion ( double  abs )

inline

Set absorbtion probability for photons internally reflected in HAPD window.

Parameters

abs	absorbtion probability

Definition at line 98 of file ARICHSimulationPar.h.

---

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

• arich/dbobjects/include/ARICHSimulationPar.h
• arich/dbobjects/src/ARICHSimulationPar.cc