#include <SAMPAProcessing.h>

Public Member Functions
	~SAMPAProcessing ()=default
	Destructor.

void	updateParameters (float vdrift=0)
	Update the OCDB parameters cached in the class. To be called once per event.

template<typename T >
T	getADCvalue (T nElectrons) const

float	getADCSaturation (const float signal) const

template<DigitzationMode MODE>
float	makeSignal (float ADCcounts, const int sector, const int globalPadInSector, const float commonMode, float &pedestal, float &noise, float tot=0)

void	getShapedSignal (float ADCsignal, float driftTime, std::vector< float > &signalArray) const

template<typename T >
T	getGamma4 (T time, T startTime, T ADC) const

TimeBin	getTimeBin (float zPos) const

float	getZfromTimeBin (float timeBin, Side s) const

TimeBin	getTimeBinFromTime (float time) const

float	getTimeFromBin (TimeBin timeBin) const

float	getTimeBinTime (float time) const

float	getNoise (const int sector, const int globalPadInSector)

float	getZeroSuppression (const int sector, const int globalPadInSector) const
	Get the zero suppression threshold for a given channel.

float	getPedestal (const int sector, const int globalPadInSector) const

float	getPedestalCRU (const int sector, const int globalPadInSector) const

Static Public Member Functions
static SAMPAProcessing &	instance ()

Detailed Description

This class takes care of the signal processing in the Front-End Cards (FECs), i.e. the shaping and the digitization Further effects such as saturation of the FECs are implemented.

Definition at line 40 of file SAMPAProcessing.h.

Constructor & Destructor Documentation

◆ ~SAMPAProcessing()

o2::tpc::SAMPAProcessing::~SAMPAProcessing ( )

default

Destructor.

Member Function Documentation

◆ getADCSaturation()

float o2::tpc::SAMPAProcessing::getADCSaturation ( const float signal ) const

inline

For larger input values the SAMPA response is not linear which is taken into account by this function

Parameters

signal Input signal

Returns: ADC value of the (saturated) SAMPA

Definition at line 221 of file SAMPAProcessing.h.

◆ getADCvalue()

template<typename T >

T o2::tpc::SAMPAProcessing::getADCvalue ( T nElectrons ) const

inline

Conversion from a given number of electrons into ADC value without taking into account saturation (vectorized)

Parameters

nElectrons Number of electrons in time bin

Returns: ADC value

Definition at line 150 of file SAMPAProcessing.h.

◆ getGamma4()

template<typename T >

T o2::tpc::SAMPAProcessing::getGamma4	(	T	time,
		T	startTime,
		T	ADC
	)		const

inline

Value of the Gamma4 shaping function at a given time (vectorized)

Parameters

time	Time of the ADC value with respect to the first bin in the pulse
startTime	First bin in the pulse
ADC	ADC value of the corresponding time bin

55 is for normalization: 1/Integral(Gamma4)

Definition at line 231 of file SAMPAProcessing.h.

◆ getNoise()

float o2::tpc::SAMPAProcessing::getNoise	(	const int	sector,
		const int	globalPadInSector
	)

inline

Get the noise for a given channel

Parameters

sector	sector number
globalPadInSector	pad number in sector

Returns: Noise on the channel of interest

Definition at line 278 of file SAMPAProcessing.h.

◆ getPedestal()

float o2::tpc::SAMPAProcessing::getPedestal	(	const int	sector,
		const int	globalPadInSector
	)		const

inline

Get the pedestal for a given channel

Parameters

sector	sector number
globalPadInSector	pad number in sector

Returns: Pedestal of the channel of interest

Definition at line 288 of file SAMPAProcessing.h.

◆ getPedestalCRU()

float o2::tpc::SAMPAProcessing::getPedestalCRU	(	const int	sector,
		const int	globalPadInSector
	)		const

inline

Get the pedestal for a given channel as used in the CRU with 10+2bit precision

Parameters

sector	sector number
globalPadInSector	pad number in sector

Returns: Pedestal of the channel of interest

Definition at line 293 of file SAMPAProcessing.h.

◆ getShapedSignal()

void SAMPAProcessing::getShapedSignal	(	float	ADCsignal,
		float	driftTime,
		std::vector< float > &	signalArray
	)		const

A delta signal is shaped by the FECs and thus spread over several time bins This function returns an array with the signal spread into the following time bins

Parameters

ADCsignal	Signal of the incoming charge
driftTime	t0 of the incoming charge

Returns: Array with the shaped signal

Todo:: the size of the array should be retrieved from ParameterElectronics::getNShapedPoints()

Definition at line 45 of file SAMPAProcessing.cxx.

◆ getTimeBin()

TimeBin o2::tpc::SAMPAProcessing::getTimeBin ( float zPos ) const

inline

Compute time bin from z position

Parameters

zPos	z position of the charge

Returns: Time bin of the charge

Definition at line 248 of file SAMPAProcessing.h.

◆ getTimeBinFromTime()

TimeBin o2::tpc::SAMPAProcessing::getTimeBinFromTime ( float time ) const

inline

Compute time bin from time

Parameters

time	time of the charge

Returns: Time bin of the charge

Definition at line 259 of file SAMPAProcessing.h.

◆ getTimeBinTime()

float o2::tpc::SAMPAProcessing::getTimeBinTime ( float time ) const

inline

Compute the time of a given time bin

Parameters

time	Time of the charge

Returns: Time of the time bin of the charge

Definition at line 273 of file SAMPAProcessing.h.

◆ getTimeFromBin()

float o2::tpc::SAMPAProcessing::getTimeFromBin ( TimeBin timeBin ) const

inline

Compute time from time bin

Parameters

timeBin time bin of the charge

Returns: Time of the charge

Definition at line 268 of file SAMPAProcessing.h.

◆ getZeroSuppression()

float o2::tpc::SAMPAProcessing::getZeroSuppression	(	const int	sector,
		const int	globalPadInSector
	)		const

inline

Get the zero suppression threshold for a given channel.

Definition at line 283 of file SAMPAProcessing.h.

◆ getZfromTimeBin()

float o2::tpc::SAMPAProcessing::getZfromTimeBin	(	float	timeBin,
		Side	s
	)		const

inline

Compute z position from time bin

Parameters

Time	bin of the charge
Side	of the TPC

Returns: zPos z position of the charge

Definition at line 253 of file SAMPAProcessing.h.

◆ instance()

static SAMPAProcessing & o2::tpc::SAMPAProcessing::instance ( )

inlinestatic

Definition at line 43 of file SAMPAProcessing.h.

◆ makeSignal()

template<DigitzationMode MODE>

float o2::tpc::SAMPAProcessing::makeSignal	(	float	ADCcounts,
		const int	sector,
		const int	globalPadInSector,
		const float	commonMode,
		float &	pedestal,
		float &	noise,
		float	tot = `0`
	)

inline

Make the full signal including noise and pedestals from the OCDB

Parameters

ADCcounts	ADC value of the signal (common mode already subtracted)
sector	Sector number
globalPadInSector	global pad number in the sector
commonMode	value of the common mode

Returns: ADC value after application of noise, pedestal and saturation

Definition at line 158 of file SAMPAProcessing.h.

◆ updateParameters()

void SAMPAProcessing::updateParameters ( float vdrift = 0 )

Update the OCDB parameters cached in the class. To be called once per event.

Definition at line 32 of file SAMPAProcessing.cxx.

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

/home/runner/work/AliceO2/AliceO2/Detectors/TPC/simulation/include/TPCSimulation/SAMPAProcessing.h
/home/runner/work/AliceO2/AliceO2/Detectors/TPC/simulation/src/SAMPAProcessing.cxx

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ ~SAMPAProcessing()

Member Function Documentation

◆ getADCSaturation()

◆ getADCvalue()

◆ getGamma4()

◆ getNoise()

◆ getPedestal()

◆ getPedestalCRU()

◆ getShapedSignal()

◆ getTimeBin()

◆ getTimeBinFromTime()

◆ getTimeBinTime()

◆ getTimeFromBin()

◆ getZeroSuppression()

◆ getZfromTimeBin()

◆ instance()

◆ makeSignal()

◆ updateParameters()