OMSimPMTResponse Class Reference

Class to simulate PMT response. More...

Detailed Description

Process hits on a photocathode and get resulting pulse properties based on lab. measurement data.

Classes
struct	PMTPulse
	Represents the output pulse for a detected photon. More...

Public Member Functions
	OMSimPMTResponse ()
PMTPulse	processPhotocathodeHit (G4double pX, G4double pY, G4double pWavelength)
	Process a hit on the photocathode into a PMT pulse.
void	makeQEweightInterpolator (const std::string &p_FileNameAbsorbedFraction)
	Configures the QE weight interpolator for PMT response.
void	makeQEInterpolator (const std::string &p_FileName)
	Creates the QE interpolator from the target QE file.
void	makeCEweightInterpolator (const std::string &p_FileName)
	Configures the CE weight interpolator for PMT response.
void	makeScansInterpolators (const std::string &p_PathToFiles)
void	setScannedWavelengths (std::vector< double > p_wavelengths)
	Set the scanned wavelengths for the PMT response.

Private Member Functions
G4double	getCharge (G4double p_WavelengthKey)
	Retrieve the charge in PE from measurements for a given wavelength.
G4double	getCharge (G4double p_WavelengthKey1, G4double p_WavelengthKey2)
	Retrieve the interpolated charge between two given wavelengths.
G4double	getTransitTime (G4double p_WavelengthKey)
	Retrieve the transit time from measurements for a given wavelength.
G4double	getTransitTime (G4double p_WavelengthKey1, G4double p_WavelengthKey2)
	Retrieve the interpolated transit time between two given wavelengths.
PMTPulse	getPulseFromInterpolation (G4double p_WavelengthKey1, G4double p_WavelengthKey2)
PMTPulse	getPulseFromKey (G4double p_WavelengthKey)
G4double	wavelengthInterpolatedValue (std::map< G4double, TH2D * > p_Map, G4double p_WavelengthKey1, G4double p_WavelengthKey2)
std::vector< G4double >	getScannedWavelengths ()
	Get the scanned wavelengths for the PMT response.

Private Attributes
bool	m_scansInterpolatorsAvailable = false
bool	m_QEWeightInterpolatorAvailable = false
bool	m_QEInterpolatorAvailable = false
bool	m_CEWeightInterpolatorAvailable = false
bool	m_simplePMT
double	m_X
double	m_Y
G4double	m_wavelength
std::vector< G4double >	m_scannedWavelengths
TGraph *	m_relativeDetectionEfficiencyInterpolator
TGraph *	m_QEfileInterpolator
TGraph *	m_weightAbsorbedToQEInterpolator
std::map< G4double, TH2D * >	m_gainG2Dmap
std::map< G4double, TH2D * >	m_gainResolutionG2Dmap
std::map< G4double, TH2D * >	m_transitTimeG2Dmap
std::map< G4double, TH2D * >	m_transitTimeSpreadG2Dmap

Constructor & Destructor Documentation

OMSimPMTResponse()

OMSimPMTResponse::OMSimPMTResponse

(

)

Todo:

Add PMT data of all PMT types

Member Function Documentation

getCharge() [1/2]

G4double OMSimPMTResponse::getCharge ( G4double  p_WavelengthKey )

private

Charge sampled from a Gaussian distribution with the mean and standard deviation of the single photon electron (SPE) resolution for the provided wavelength key.

Parameters

p_WavelengthKey

The key for selecting a scan from the available measurements.

Returns

G4double The charge in PE.

getCharge() [2/2]

G4double OMSimPMTResponse::getCharge ( G4double  p_Wavelength1, G4double  p_Wavelength2  )

private

This method interpolates the charge between the two provided wavelengths and then returns the charge sampled from a Gaussian distribution with the mean interpolated charge and interpolated single photon electron (SPE) resolution.

Parameters

p_Wavelength1	The first wavelength key for interpolation.
p_Wavelength2	The second wavelength key for interpolation.

Returns

G4double The interpolated charge in PE.

getPulseFromInterpolation()

OMSimPMTResponse::PMTPulse OMSimPMTResponse::getPulseFromInterpolation ( G4double  p_WavelengthKey1, G4double  p_WavelengthKey2  )

private

Get a finished Pulse interpolating scan results between measured wavelengths (simulated photons has a wavelength between these two)

Parameters

p_WavelengthKey1	first wavelength key to be used
p_WavelengthKey2	second wavelength key to be used

Returns

PMTPulse Struct with transit time, charge and detection probability

getPulseFromKey()

OMSimPMTResponse::PMTPulse OMSimPMTResponse::getPulseFromKey ( G4double  p_WavelengthKey )

private

Get a finished Pulse using a key for the maps directly

Parameters

p_WavelengthKey

wavelength key to be used

Returns

PMTPulse Struct with transit time, charge and detection probability

getScannedWavelengths()

std::vector< G4double > OMSimPMTResponse::getScannedWavelengths ( )

private

Returns

std::vector<double> The scanned wavelengths.

getTransitTime() [1/2]

G4double OMSimPMTResponse::getTransitTime ( G4double  p_WavelengthKey )

private

This method returns the transit time sampled from a Gaussian distribution with the mean transit time and transit time spread for the provided wavelength key.

Parameters

p_WavelengthKey

The key for selecting a scan from the available measurements.

Returns

G4double The transit time in ns.

getTransitTime() [2/2]

G4double OMSimPMTResponse::getTransitTime ( G4double  p_Wavelength1, G4double  p_Wavelength2  )

private

This method interpolates the transit time between the two provided wavelengths and then returns the time sampled from a Gaussian distribution with the mean interpolated transit time and interpolated transit time spread.

Parameters

p_Wavelength1	The first wavelength key for interpolation.
p_Wavelength2	The second wavelength key for interpolation.

Returns

G4double The interpolated transit time in ns.

makeCEweightInterpolator()

void OMSimPMTResponse::makeCEweightInterpolator

(

const std::string &

p_FileName

)

Parameters

p_FileName

File name containing CE weights

makeQEInterpolator()

void OMSimPMTResponse::makeQEInterpolator

(

const std::string &

p_FileNameTargetQE

)

Parameters

p_FileNameTargetQE

File name containing target QE data.

makeQEweightInterpolator()

void OMSimPMTResponse::makeQEweightInterpolator

(

const std::string &

p_FileNameAbsorbedFraction

)

Parameters

p_FileNameAbsorbedFraction

File name containing absorbed fraction data

processPhotocathodeHit()

OMSimPMTResponse::PMTPulse OMSimPMTResponse::processPhotocathodeHit	(	G4double	p_x,
		G4double	p_y,
		G4double	p_wavelength
	)

Transform a hit based on its location and photon wavelength to a PMT pulse, considering the transit time, charge, and detection probability.

Parameters

p_x	x position on photocathode
p_y	y position on photocathode
p_wavelength	Wavelength of the hitting photon

Returns

PMTPulse representing the processed hit.

setScannedWavelengths()

void OMSimPMTResponse::setScannedWavelengths

(

std::vector< double >

p_wavelengths

)

Parameters

p_wavelengths

The scanned wavelengths.

wavelengthInterpolatedValue()

G4double OMSimPMTResponse::wavelengthInterpolatedValue ( std::map< G4double, TH2D * >  p_Map, G4double  p_Wavelength1, G4double  p_Wavelength2  )

private

Get interpolated value between two scans of different wavelenths

Parameters

p_Map	Map with TGraph2D scans to be used
p_Wavelength1	first reference wavelength for interpolation
p_Wavelength2	second reference wavelength for interpolation

Returns

G4double interpolated value

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

• OMSimPMTResponse.hh
• OMSimPMTResponse.cc