The SVD waveform class. More...

#include <SVDWaveform.h>

Classes
struct	ElementaryWaveform
	Type to store elementary waveform parameters. More...

Public Types
typedef std::deque< ElementaryWaveform >	elementary_waveform_list
	List of elementary waveforms.

typedef std::map< RelationElement::index_type, RelationElement::weight_type >	relations_map
	Type to store contributions to strip signal by different particles on output of SVDWaveform.

typedef std::map< RelationElement::index_type, RelationElement::weight_type >::value_type	relation_value_type
	Type of relation_map elements.

Public Member Functions
	SVDWaveform ()
	Default constructor.

	SVDWaveform (const SVDWaveform &other)
	Copy constructor.

void	add (double initTime, double charge, double tau, int particle=-1, int truehit=-1, WaveformShape wfun=w_betaprime)
	Add a chargelet waveform to the total strip waveform.

SVDWaveform &	operator= (const SVDWaveform &other)
	Make the SVDWaveform assignable.

double	waveform (double t, double initTime, double charge, double tau, WaveformShape wfun=w_betaprime) const
	Waveform shape.

double	waveform (double t, const ElementaryWaveform &elemWaveform) const
	Waveform taking parameters from a ElementaryWaveform struct.

double	operator() (double t) const
	Make SVDWaveform a functor.

double	getCharge () const
	Return the charge collected in the strip.

const elementary_waveform_list &	getElementaryWaveforms () const
	Return the list of waveform parameters.

const relations_map &	getMCParticleRelations () const
	Return the list of MCParticle relations.

const relations_map &	getTrueHitRelations () const
	Return the list of TrueHit relations.

std::string	toString () const
	Produce a string representation of the object.

Protected Attributes
double	m_charge
	charge of the pixel

elementary_waveform_list	m_elementaryWaveforms
	list of elementary waveform parameters.

relations_map	m_particles
	Map of MCParticle associations.

relations_map	m_truehits
	Map of TrueHit associations.

Detailed Description

The SVD waveform class.

The class implements the waveform appearing on an SVD strip as a result of ionization by particles passing through the detector. The class accumulates elementary waveforms formed by chargelets contributing to the charge accumulated on the strip. Currently two types of elementary waveforms are in use: w_betaprime and w_adjacent. The class is a functor returning values of summary waveform at a given time. Poisson and gaussian noises will be added externally.

Definition at line 38 of file SVDWaveform.h.

Member Typedef Documentation

◆ elementary_waveform_list

typedef std::deque< ElementaryWaveform > elementary_waveform_list

List of elementary waveforms.

Definition at line 77 of file SVDWaveform.h.

◆ relation_value_type

typedef std::map<RelationElement::index_type,RelationElement::weight_type>::value_type relation_value_type

Type of relation_map elements.

Definition at line 82 of file SVDWaveform.h.

◆ relations_map

typedef std::map<RelationElement::index_type, RelationElement::weight_type> relations_map

Type to store contributions to strip signal by different particles on output of SVDWaveform.

Definition at line 80 of file SVDWaveform.h.

Constructor & Destructor Documentation

◆ SVDWaveform() [1/2]

SVDWaveform ( )

inline

Default constructor.

Definition at line 85 of file SVDWaveform.h.

85: m_charge(0) {}

Belle2::SVD::SVDWaveform::m_charge

double m_charge

charge of the pixel

Definition: SVDWaveform.h:198

◆ SVDWaveform() [2/2]

SVDWaveform ( const SVDWaveform & other )

inline

Copy constructor.

Definition at line 88 of file SVDWaveform.h.

      {
        m_charge = other.getCharge();
        for (ElementaryWaveform elementary_waveform : other.getElementaryWaveforms())
          m_elementaryWaveforms.push_back(elementary_waveform);
      }

Member Function Documentation

◆ add()

void add	(	double	initTime,
		double	charge,
		double	tau,
		int	particle = `-1`,
		int	truehit = `-1`,
		WaveformShape	wfun = `w_betaprime`
	)

inline

Add a chargelet waveform to the total strip waveform.

Negative sign of charge has a special meaning, it designates noise signal carrying otherwise no useful information.

Parameters

charge	Charge in electrons to be added
initTime	Time of arrival of the chargelet to the sensitive surface of the sensor.
tau	Characteristic time of waveform decay.
particle	Index of the particle contributing the charge, -1 for no particle/noise
truehit	Index of the truehit corresponding to the particle that contributed the charge.
wfun	waveform shaper function

Definition at line 106 of file SVDWaveform.h.

      {
        if (charge > 0) {
          m_charge += charge;
          m_elementaryWaveforms.push_back(ElementaryWaveform(initTime, charge, tau, wfun, particle, truehit));
          if (particle > -1) m_particles[particle] += static_cast<float>(charge);
          if (truehit > -1) m_truehits[truehit] += static_cast<float>(charge);
        } else if (m_charge == 0)
          m_charge += charge;
      }

◆ getCharge()

double getCharge ( ) const

inline

Return the charge collected in the strip.

Returns: Total charge of the waveform.

Definition at line 169 of file SVDWaveform.h.

169{ return m_charge; }

◆ getElementaryWaveforms()

const elementary_waveform_list & getElementaryWaveforms ( ) const

inline

Return the list of waveform parameters.

Returns: The deque containing SVDWaveform::ElementaryWaveform structs with waveform parameters.

Definition at line 174 of file SVDWaveform.h.

174{ return m_elementaryWaveforms; }

◆ getMCParticleRelations()

const relations_map & getMCParticleRelations ( ) const

inline

Return the list of MCParticle relations.

Returns: SVDWaveform::relations_map with MCParticle relations of the signal.

Definition at line 179 of file SVDWaveform.h.

179{ return m_particles; }

◆ getTrueHitRelations()

const relations_map & getTrueHitRelations ( ) const

inline

Return the list of TrueHit relations.

Returns: SVDWaveform::relations_map with TrueHit relations of the signal.

Definition at line 184 of file SVDWaveform.h.

184{ return m_truehits; }

◆ operator()()

double operator() ( double t ) const

inline

Make SVDWaveform a functor.

Parameters

t	The time at which output is to be calculated.

Returns: value of the waveform

Definition at line 157 of file SVDWaveform.h.

      {
        double total_waveform = 0;
        for (SVDWaveform::ElementaryWaveform elementary_waveform : m_elementaryWaveforms) {
          total_waveform += waveform(t, elementary_waveform);
        }
        return total_waveform;
      }

◆ operator=()

SVDWaveform & operator= ( const SVDWaveform & other )

inline

Make the SVDWaveform assignable.

Parameters

other The original signal.

Returns: This signal with all quantities set to those of the other.

Definition at line 121 of file SVDWaveform.h.

      {
        m_charge = other.getCharge();
        m_elementaryWaveforms.clear();
        std::copy(other.getElementaryWaveforms().begin(), other.getElementaryWaveforms().end(), m_elementaryWaveforms.begin());
        return *this;
      }

◆ toString()

std::string toString ( ) const

inline

Produce a string representation of the object.

Definition at line 186 of file SVDWaveform.h.

      {
        std::ostringstream os;
        size_t i = 0;
        for (auto elementary_waveform : m_elementaryWaveforms)
          os << ++i << '\t' << elementary_waveform.toString();
        return os.str();
      }

◆ waveform() [1/2]

double waveform	(	double	t,
		const ElementaryWaveform &	elemWaveform
	)		const

inline

Waveform taking parameters from a ElementaryWaveform struct.

Parameters

t	The time at which the function is to be calculated.
elemWaveform	The SVDWaveform::ElementaryWaveform struct with parameters of a waveform.

Returns: The value of the waveform at time t.

Definition at line 150 of file SVDWaveform.h.

151 { return waveform(t, elemWaveform.m_initTime, elemWaveform.m_charge, elemWaveform.m_tau, elemWaveform.m_wfun); }

◆ waveform() [2/2]

double waveform	(	double	t,
		double	initTime,
		double	charge,
		double	tau,
		WaveformShape	wfun = `w_betaprime`
	)		const

inline

Waveform shape.

Parameters

t	The time at which the function is to be calculated.
initTime	The initial time of the waveform.
charge	The charge (peak value) of the waveform.
tau	The scale parameter (decay time) of the waveform.
wfun	The functional form of the waveform. Default is betaprime. The function is normalized to peak value of 1.

Returns: Value of the waveform at t.

Definition at line 138 of file SVDWaveform.h.

      {
        double z = (t - initTime) / tau;
        return charge * wfun(z);
      }

Member Data Documentation

◆ m_charge

double m_charge

protected

charge of the pixel

Definition at line 198 of file SVDWaveform.h.

◆ m_elementaryWaveforms

elementary_waveform_list m_elementaryWaveforms

protected

list of elementary waveform parameters.

Definition at line 200 of file SVDWaveform.h.

◆ m_particles

relations_map m_particles

protected

Map of MCParticle associations.

Definition at line 202 of file SVDWaveform.h.

◆ m_truehits

relations_map m_truehits

protected

Map of TrueHit associations.

Definition at line 204 of file SVDWaveform.h.

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

svd/simulation/include/SVDWaveform.h

Classes

Public Types

Public Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

◆ elementary_waveform_list

◆ relation_value_type

◆ relations_map

Constructor & Destructor Documentation

◆ SVDWaveform() [1/2]

◆ SVDWaveform() [2/2]

Member Function Documentation

◆ add()

◆ getCharge()

◆ getElementaryWaveforms()

◆ getMCParticleRelations()

◆ getTrueHitRelations()

◆ operator()()

◆ operator=()

◆ toString()

◆ waveform() [1/2]

◆ waveform() [2/2]

Member Data Documentation

◆ m_charge

◆ m_elementaryWaveforms

◆ m_particles

◆ m_truehits