Detailed Description

An abstract class to define common optics parameters and methods.

TRestAxionOptics is a class that allows to describe the geometrical and mirror properties of an optics focusing device. This metadata class is a pure abstract class used to define common data members and methods to any specific optics class.

Conceptual optics implementation

This class implements a method, TRestAxionOptics::PropagatePhoton, that is used to generate the tracking of a photon given an initial position and direction. The photon propagation is done in different phases, where the photon position and direction is calculated at different optical interfaces (entrance/middle/exit) as it is shown in the following figure.

The transport of the photon in between two interfaces is controlled by two pure virtual methods TRestAxionOptics::FirstMirrorReflection and TRestAxionOptics::SecondMirrorReflection, that must be implemented at the inherited optics class, such as is is done at TRestAxionWolterOptics.

Other pure virtual methods need to be implemented at the inherited class in order to define the limits of the optical device, such as TRestAxionOptics::GetEntrancePositionZ, TRestAxionOptics::GetExitPositionZ or TRestAxionOptics::GetRadialLimits.

Furthermore, this class will define common methods that can be exploited by any optical device, such as TRestAxionOptics::FindFocal or TRestAxionOptics::CalculateSpotSize, which are MonteCarlo based, and can be optionally re-implemented at the inherited class.

Optics metadata description

This class defines generic optics metadata members, that can be further extended at the inherited classes as needed.

We distinguish the following metadata members (which will be stored on disk and that can be initalized through RML).

mirrorLength: It defines a common mirror length for the optics.
opticsFile: It is a text file describing a table with values giving geometrical information about the mirror positioning, thickness, or any other information required to describe the mirrors geometry. Each column on the data file will be related to a property of the optics, such as mirror radius, thickness, angle. While each row will correspond to a particular mirror. The meaning for each column must be implemented at the inherited class. TRestAxionOptics implementation just takes care of reading the file and storing it inside the fOpticsData member that is accessible to the inherited classes.
mirrorProperties: It is an instance of TRestAxionOpticsMirror that contains the mirror properties, such as reflectivity as a function of angle and energy.

Optical masks

Each of the optical interfaces (entrance/middle/optics) is associated with an optical mask where we can identify regions. These regions allow to determine if a photon entered by and exited from the same optical cavity or allowed region. The use of 3 masks at the entrance, middle and exit levels permits to create a 3-dimensional constrain of the movement of the photon.

Thus, masks must be constructed by the inherited class using a TRestCombinedMask definition that is instantiated at the TRestAxionOptics level as fEntranceMask, fMiddleMask and fExitMask.

Common drawing methods

This class also defines common drawing methods such as TRestAxionOptics::DrawScatterMaps, TRestAxionOptics::DrawDensityMaps and TRestAxionOptics::DrawParticleTracks. That may help to visualize and debug the tracking of photons by the new implemented optics device.

A pure virtual method TRestAxionOptics::DrawMirrors must be implemented at each class in order to draw the mirrors position, to be visualized on the TRestAxionOptics::DrawParticleTracks method.

The method TRestAxionOptics::DrawParticleTracks is designed to draw few photon tracks and help to debug the correct tracking of light particles. The thickness of the mirror lines representing the mirror shells is proportional to the real thickness, and the color of photons is chosen to match the color of the reflecting mirror. If the photon hits the entrance mask (spider or mirrors) the line will be coloured in black.

Additionally, TRestAxionOptics::DrawParticleTracks will print on screen the result of the tracking for each particle using the method TRestAxionOptics::PrintPhotonTrackingSummary. Additional debuging information can be printed on screen by setting the output level to debug, verboseLevel="debug".

RESTsoft - Software for Rare Event Searches with TPCs

History of developments:

2022-February: First concept and implementation of TRestAxionOptics class. Javier Galan

Author: Javier Galan javie.nosp@m.r.ga.nosp@m.lan@u.nosp@m.niza.nosp@m.r.es

Definition at line 35 of file TRestAxionOptics.h.

#include <TRestAxionOptics.h>

Inheritance diagram for TRestAxionOptics:

Public Member Functions
Double_t	CalculateSpotSize (Double_t energy, Double_t z, Int_t particles=15000)
	It measures the spot size through Monte Carlo at a given plane given by z. If z=0 this method will check for the spot size at the focal point, which is the default behaviour. More...

TPad *	CreatePad (Int_t nx=1, Int_t ny=1)
	A prototype method to be implemented by specific optics to draw an schematic including the mirrors geometry.

TPad *	DrawDensityMaps (Double_t z, Double_t energy=0, Double_t deviation=0, Int_t particles=1000, Double_t focalHint=7500)
	It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class. More...

virtual TPad *	DrawMirrors ()=0
	It draws the mirrors using a TGraph. To be implemented at the inherited class.

TPad *	DrawParticleTracks (Double_t deviation=0, Int_t particles=10)
	A method to draw an optics schematic including the mirrors geometry, and few photon tracks. This method is intended for debugging the photon tracking implementation. More...

TPad *	DrawScatterMaps (Double_t z, Double_t energy=0, Double_t deviation=0, Int_t particles=1000, Double_t focalHint=7500)
	It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class. More...

virtual Double_t	FindFocal (Double_t from, Double_t to, Double_t energy, Double_t precision=1, Bool_t recalculate=false, Int_t particles=5000)
	It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class. More...

virtual Int_t	FirstMirrorReflection (const TVector3 &pos, const TVector3 &dir)=0
	It updates the values fFirstInteractionPosition and fMiddleDirection. Returns 0 if is not in region.

Double_t	GetEntranceAngle ()
	It returns the entrance angle to the optical axis (in radians).

TVector3	GetEntranceDirection ()
	Returns the entrance position from the latest propagated photon.

TRestCombinedMask *const &	GetEntranceMask () const
	Returns a pointer to access directly the entrance mask information.

TVector3	GetEntrancePosition ()
	Returns the entrance position from the latest propagated photon.

virtual Double_t	GetEntrancePositionZ ()=0
	It returns the entrance Z-position defined by the optical axis.

TVector3	GetExitDirection ()
	Returns the exit position from the latest propagated photon.

TRestCombinedMask *const &	GetExitMask () const
	Returns a pointer to access directly the exit mask information.

TVector3	GetExitPosition ()
	Returns the exit position from the latest propagated photon.

virtual Double_t	GetExitPositionZ ()=0
	It returns the exit Z-position defined by the optical axis.

TVector3	GetLastGoodDirection ()
	It returns the last valid particle direction known in the particle tracking.

TVector3	GetLastGoodPosition ()
	It returns the last valid particle position known in the particle tracking.

TVector3	GetMiddleDirection ()
	Returns the middle position from the latest propagated photon.

TRestCombinedMask *const &	GetMiddleMask () const
	Returns a pointer to access directly the middle mask information.

TVector3	GetMiddlePosition ()
	Returns the middle position from the latest propagated photon.

TRestAxionOpticsMirror *const &	GetMirrorProperties () const
	Returns a pointer to access directly the exit mask information.

Int_t	GetNumberOfReflections ()
	It returns the total number of reflections. Considering maximum 1-reflection per mirror.

virtual std::pair< Double_t, Double_t >	GetRadialLimits ()=0
	It returns the lower/higher radius range where photons are allowed.

void	InitFromConfigFile ()
	Initialization of TRestAxionOptics field members through a RML file.

virtual void	Initialize ()
	Initialization of TRestAxionOptics members.

Bool_t	IsFirstMirrorReflection ()
	It returns true if the photon got reflected in the first mirror.

Bool_t	IsSecondMirrorReflection ()
	It returns true if the photon got reflected in the second mirror.

void	PrintEntranceMask ()
	Prints on screen the mask used on the entrance optics plane.

void	PrintExitMask ()
	Prints on screen the mask used on the exit optics plane.

void	PrintMasks ()
	Prints on screen the 3-optical masks used on the optics planes.

void	PrintMetadata ()
	Prints on screen the information about the metadata members of TRestAxionOptics.

void	PrintMiddleMask ()
	Prints on screen the mask used on the middle optics plane.

void	PrintMirror ()
	Prints on screen the 3-optical masks used on the optics planes.

void	PrintPhotonTrackingSummary ()
	Prints the positions taken by the photon after ray-tracing that should have been updated using the method PropagatePhoton.

Double_t	PropagateMonteCarloPhoton (Double_t energy, Double_t deviation)
	It will produce a MonteCarlo photon spatially distributed in XY as defined by the GetRadialLimits method (extended by 50%), and with direction along the Z-axis with a maximum deviation angle fixed by the `deviation` input parameter. If `deviation=0` the photons will always be parallel to the z-axis. The photons will be launched from z=-3*fMirrorLength.

Double_t	PropagatePhoton (const TVector3 &pos, const TVector3 &dir, Double_t energy)
	Propagating photon. More...

virtual Int_t	SecondMirrorReflection (const TVector3 &pos, const TVector3 &dir)=0
	It updates the values fSecondInteractionPosition and fExitDirection. Returns 0 if is not in region.

	~TRestAxionOptics ()
	Default destructor.

Public Member Functions inherited from TRestMetadata
void	AddLog (std::string log="", bool print=true)
	Add logs to messageBuffer.

void	DoNotStore ()
	If this method is called the metadata information will not be stored in disk.

TVector2	Get2DVectorParameterWithUnits (std::string parName, TVector2 defaultValue=TVector2(-1, -1))

TVector3	Get3DVectorParameterWithUnits (std::string parName, TVector3 defaultValue=TVector3(-1, -1, -1))

TString	GetCommit ()
	Returns the REST commit value stored in fCommit.

std::string	GetConfigBuffer ()
	Returns the config section of this class.

std::string	GetDataMemberValue (std::string memberName)
	Get the value of data member as string. More...

std::vector< std::string >	GetDataMemberValues (std::string memberName, Int_t precision=0)
	Get the value of datamember as a vector of strings. More...

TString	GetDataPath ()
	Returns a std::string with the path used for data storage.

Double_t	GetDblParameterWithUnits (std::string parName, Double_t defaultValue=PARAMETER_NOT_FOUND_DBL)
	Gets the value of the parameter name parName, after applying unit conversion. More...

Bool_t	GetError () const
	It returns true if an error was identified by a derived metadata class.

TString	GetErrorMessage ()
	Returns a std::string containing the error message.

TString	GetLibraryVersion ()
	Returns the REST libraty version stored in fLibraryVersion.

TString	GetMainDataPath ()
	Gets a std::string with the path used for data storage.

Int_t	GetNumberOfErrors () const

Int_t	GetNumberOfWarnings () const

std::string	GetParameter (std::string parName, TString defaultValue=PARAMETER_NOT_FOUND_STR)
	Returns corresponding REST Metadata parameter from multiple sources. More...

std::string	GetSectionName ()
	Returns the section name of this class, defined at the beginning of fSectionName.

TRestStringOutput::REST_Verbose_Level	GetVerboseLevel ()
	returns the verboselevel in type of REST_Verbose_Level enumerator

TString	GetVerboseLevelString ()
	returns the verbose level in type of TString More...

TString	GetVersion ()
	Returns the REST version stored in fVersion.

Int_t	GetVersionCode ()

UInt_t	GetVersionMajor () const

UInt_t	GetVersionMinor () const

UInt_t	GetVersionPatch () const

Bool_t	GetWarning () const
	It returns true if an error was identified by a derived metadata class.

TString	GetWarningMessage ()
	Returns a std::string containing the warning message.

TRestMetadata *	InstantiateChildMetadata (int index, std::string pattern="")
	This method will retrieve a new TRestMetadata instance of a child element of the present TRestMetadata instance based on the `index` given by argument, which defines the element order to be retrieved, 0 for first element found, 1 for the second element found, etc. More...

TRestMetadata *	InstantiateChildMetadata (std::string pattern="", std::string name="")
	This method will retrieve a new TRestMetadata instance of a child element of the present TRestMetadata instance based on the `name` given by argument. More...

Bool_t	isCleanState () const

Bool_t	isOfficialRelease () const

Int_t	LoadConfigFromBuffer ()
	Initialize data from a string element buffer. More...

Int_t	LoadConfigFromElement (TiXmlElement eSectional, TiXmlElement eGlobal, std::map< std::string, std::string > envs={})
	Main starter method. More...

Int_t	LoadConfigFromFile (const std::string &configFilename, const std::string &sectionName="")
	Give the file name, find out the corresponding section. Then call the main starter.

virtual void	Merge (const TRestMetadata &)

TRestMetadata &	operator= (const TRestMetadata &)

void	Print ()
	Implementing TObject::Print() method.

void	PrintConfigBuffer ()
	Print the config xml section stored in the class. More...

void	PrintMessageBuffer ()
	Print the buffered message.

void	PrintTimeStamp (Double_t timeStamp)
	Print the current time on local machine. More...

void	SetConfigFile (std::string configFilename)
	set config file path from external

void	SetError (std::string message="", bool print=true, int maxPrint=5)
	A metadata class may use this method to signal that something went wrong.

void	SetHostmgr (TRestManager *m)
	Set the host manager for this class.

void	SetSectionName (std::string sName)
	set the section name, clear the section content

void	SetVerboseLevel (TRestStringOutput::REST_Verbose_Level v)
	sets the verbose level

void	SetWarning (std::string message="", bool print=true, int maxPrint=5)
	A metadata class may use this method to signal that something went wrong.

void	Store ()
	If this method is called the metadata information will be stored in disk.

	TRestMetadata (const TRestMetadata &)

virtual void	UpdateMetadataMembers ()
	Method to allow implementation of specific metadata members updates at inherited classes.

virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	overwriting the write() method with fStore considered

void	WriteConfigBuffer (std::string fName)
	Writes the config buffer to a file in append mode.

	~TRestMetadata ()
	TRestMetadata default destructor.

Protected Member Functions
Int_t	GetMirror ()
	It returns the mirror index to be used in the photon reflection.

virtual void	SetMirror ()=0
	It must be implemented at the inherited optics, making use of fEntrancePosition.

Int_t	TransportToEntrance (const TVector3 &pos, const TVector3 &dir)
	It moves the incoming particle at the entrance of the optics plane and returns the region number where the particle is entering. More...

Int_t	TransportToExit (const TVector3 &pos, const TVector3 &dir)
	It moves the incoming particle to the exit of the optics plane and returns the region number where the particle is entering. More...

Int_t	TransportToMiddle (const TVector3 &pos, const TVector3 &dir)
	It moves the incoming particle to the middle of the optics plane and returns the region number where the particle is entering. More...

	TRestAxionOptics ()
	Default constructor.

	TRestAxionOptics (const char *cfgFileName, std::string name="")
	Constructor loading data from a config file. More...

Protected Member Functions inherited from TRestMetadata
std::string	ElementToString (TiXmlElement *ele)
	Convert an TiXmlElement object to string. More...

TVector2	Get2DVectorParameterWithUnits (std::string parName, TiXmlElement *e, TVector2 defaultValue=TVector2(-1, -1))

TVector3	Get3DVectorParameterWithUnits (std::string parName, TiXmlElement *e, TVector3 defaultValue=TVector3(-1, -1, -1))

Double_t	GetDblParameterWithUnits (std::string parName, TiXmlElement *e, Double_t defaultVal=PARAMETER_NOT_FOUND_DBL)

TiXmlElement *	GetElement (std::string eleDeclare, TiXmlElement *e=nullptr)
	Get an xml element from a given parent element, according to its declaration.

TiXmlElement *	GetElementFromFile (std::string configFilename, std::string NameOrDecalre="")
	Open an xml encoded file and find its element. More...

TiXmlElement *	GetElementWithName (std::string eleDeclare, std::string eleName)
	Get an xml element from the default location, according to its declaration and its field "name".

TiXmlElement *	GetElementWithName (std::string eleDeclare, std::string eleName, TiXmlElement *e)
	Get an xml element from a given parent element, according to its declaration and its field "name".

std::string	GetFieldValue (std::string fieldName, std::string definition, size_t fromPosition=0)
	Gets field value in an xml element string by parsing it as TiXmlElement.

std::string	GetFieldValue (std::string parName, TiXmlElement *e)
	Returns the field value of an xml element which has the specified name. More...

std::string	GetKEYDefinition (std::string keyName)
	Gets the first key definition for keyName found inside buffer starting at fromPosition. More...

std::string	GetKEYDefinition (std::string keyName, size_t &Position)

std::string	GetKEYDefinition (std::string keyName, size_t &Position, std::string buffer)

std::string	GetKEYDefinition (std::string keyName, std::string buffer)

std::string	GetKEYStructure (std::string keyName)
	Gets the first key structure for keyName found inside buffer after fromPosition. More...

std::string	GetKEYStructure (std::string keyName, size_t &Position)

std::string	GetKEYStructure (std::string keyName, size_t &Position, std::string buffer)

std::string	GetKEYStructure (std::string keyName, size_t &Position, TiXmlElement *ele)

std::string	GetKEYStructure (std::string keyName, std::string buffer)

TiXmlElement *	GetNextElement (TiXmlElement *e)
	Get the next sibling xml element of this element, with same eleDeclare.

std::string	GetParameter (std::string parName, size_t &pos, std::string inputString)
	Returns the value for the parameter name parName found in inputString. More...

std::string	GetParameter (std::string parName, TiXmlElement *e, TString defaultValue=PARAMETER_NOT_FOUND_STR)
	Returns the value for the parameter named parName in the given section. More...

std::pair< std::string, std::string >	GetParameterAndUnits (std::string parname, TiXmlElement *e=nullptr)
	Returns the unit string of the given parameter of the given xml section. More...

std::map< std::string, std::string >	GetParametersList ()
	It retrieves a map of all parameter:value found in the metadata class.

TString	GetSearchPath ()

virtual void	InitFromRootFile ()
	Method called after the object is retrieved from root file.

virtual Int_t	LoadSectionMetadata ()
	This method does some preparation of xml section. More...

void	ReadAllParameters ()
	Reflection methods, Set value of a datamember in class according to TRestMetadata::fElement. More...

void	ReadParametersList (std::map< std::string, std::string > &list)
	It reads a parameter list and associates it to its corresponding metadata member. par0 --> fPar0.

std::string	ReplaceConstants (const std::string buffer)
	Identifies "constants" in the input buffer, and replace them with corresponding value. More...

std::string	ReplaceVariables (const std::string buffer)
	Identifies environmental variable replacing marks in the input buffer, and replace them with corresponding value. More...

void	ReSetVersion ()
	Resets the version of TRestRun to REST_RELEASE. Only TRestRun is allowed to update version.

std::string	SearchFile (std::string filename)
	Search files in current directory and directories specified in "searchPath" section. More...

void	SetLibraryVersion (TString version)
	Set the library version of this metadata class.

TiXmlElement *	StringToElement (std::string definition)
	Parsing a string into TiXmlElement object. More...

	TRestMetadata ()
	TRestMetadata default constructor.

	TRestMetadata (const char *configFilename)
	constructor

void	UnSetVersion ()
	Resets the version of TRestRun to -1, in case the file is old REST file. Only TRestRun is allowed to update version.

Protected Attributes
Int_t	fCurrentMirror = -1
	During the photon propagation it keeps track of the active mirror shell.

TVector3	fEntranceDirection
	The particle position at the optics plane entrance.

TRestCombinedMask *	fEntranceMask = nullptr
	The entrance optical mask that defines a pattern with regions identified with a number.

TVector3	fEntrancePosition
	The particle position at the optics plane entrance.

TVector3	fExitDirection
	The particle position at the optics plane exit.

TRestCombinedMask *	fExitMask = nullptr
	The exit optical mask that defines a pattern with regions identified with a number.

TVector3	fExitPosition
	The particle position at the optics plane exit.

Bool_t	fFirstInteraction = false
	During the photon propagation it tells us if the photon interacted in the first mirror.

TVector3	fFirstInteractionPosition
	The particle position at the front mirror interaction point.

Double_t	fFocal = -1
	The calculated focal in mm. It is updated by the method TRestAxionOptics::FindFocal.

TVector3	fMiddleDirection
	The particle position at the optics plane middle.

TRestCombinedMask *	fMiddleMask = nullptr
	The middle optical mask that defines a pattern with regions identified with a number.

TVector3	fMiddlePosition
	The particle position at the optics plane middle.

Double_t	fMirrorLength = 0
	The mirror length. If all mirrors got the same length. Otherwise will be zero.

TRestAxionOpticsMirror *	fMirrorProperties = nullptr
	The mirror properties.

std::vector< std::vector< Double_t > >	fOpticsData
	The optics data table extracted from fOpticsFile.

std::string	fOpticsFile = ""
	An optics file that contains all the specific optics parameters.

TVector3	fOriginPosition
	The particle position at the origin.

TPad *	fPad = nullptr
	A pad pointer to be used by the drawing methods.

TRandom3 *	fRandom = nullptr
	Random number generator.

Bool_t	fSecondInteraction = false
	During the photon propagation it tells us if the photon interacted in the second mirror.

TVector3	fSecondInteractionPosition
	The particle position at the back mirror interaction point.

Protected Attributes inherited from TRestMetadata
std::string	configBuffer
	The buffer where the corresponding metadata section is stored. Filled only during Write()

std::string	fConfigFileName
	Full name of the rml file. More...

std::map< std::string, std::string >	fConstants
	Saving a list of rml constants. name-value std::pair. Constants are temporary for this class only.

TiXmlElement *	fElement
	Saving the sectional element together with global element.

TiXmlElement *	fElementGlobal
	Saving the global element, to be passed to the resident class, if necessary.

Bool_t	fError = false
	It can be used as a way to identify that something went wrong using SetError method.

TString	fErrorMessage = ""
	A std::string to store an optional error message through method SetError.

TRestManager *	fHostmgr
	All metadata classes can be initialized and managed by TRestManager.

Int_t	fNErrors = 0
	It counts the number of errors notified.

Int_t	fNWarnings = 0
	It counts the number of warnings notified.

std::string	fSectionName
	Section name given in the constructor of the derived metadata class.

Bool_t	fStore
	This variable is used to determine if the metadata structure should be stored in the ROOT file.

std::map< std::string, std::string >	fVariables
	Saving a list of rml variables. name-value std::pair.

TRestStringOutput::REST_Verbose_Level	fVerboseLevel
	Verbose level used to print debug info.

Bool_t	fWarning = false
	It can be used as a way to identify that something went wrong using SetWarning method.

TString	fWarningMessage = ""
	It can be used as a way to identify that something went wrong using SetWarning method.

std::string	messageBuffer
	The buffer to store the output message through TRestStringOutput in this class.

endl_t	RESTendl
	Termination flag object for TRestStringOutput.

Private Member Functions
Double_t	GetPhotonReflectivity (Double_t energy)
	A prototype method to be implemented by specific optics to draw an schematic including the mirrors geometry.

void	ResetPositions ()
	It reinitializes particle positions and directions at the different optical regions.

Constructor & Destructor Documentation

◆ TRestAxionOptics()

TRestAxionOptics::TRestAxionOptics	(	const char *	cfgFileName,
		std::string	name = `""`
	)

protected

Constructor loading data from a config file.

If no configuration path is defined using TRestMetadata::SetConfigFilePath the path to the config file must be specified using full path, absolute or relative.

The default behaviour is that the config file must be specified with full path, absolute or relative.

Parameters

cfgFileName	A const char* giving the path to an RML file.
name	The name of the specific metadata. It will be used to find the corresponding TRestAxionOptics section inside the RML.

Definition at line 172 of file TRestAxionOptics.cxx.

Member Function Documentation

◆ CalculateSpotSize()

Double_t TRestAxionOptics::CalculateSpotSize	(	Double_t	energy,
		Double_t	z,
		Int_t	particles = `15000`
	)

It measures the spot size through Monte Carlo at a given plane given by z. If z=0 this method will check for the spot size at the focal point, which is the default behaviour.

The spot is assumed to be centered at (0,0). We are describing a perfectly aligned optics device.

The Monte Carlo generated photons are also considered to be perfectly aligned with the z-axis.

Definition at line 739 of file TRestAxionOptics.cxx.

◆ DrawDensityMaps()

TPad * TRestAxionOptics::DrawDensityMaps	(	Double_t	z,
		Double_t	energy = `0`,
		Double_t	deviation = `0`,
		Int_t	particles = `1000`,
		Double_t	focalHint = `7500`
	)

It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class.

Focal position will be searched around focalHint within half a meter range.

Definition at line 919 of file TRestAxionOptics.cxx.

◆ DrawParticleTracks()

TPad * TRestAxionOptics::DrawParticleTracks	(	Double_t	deviation = `0`,
		Int_t	particles = `10`
	)

A method to draw an optics schematic including the mirrors geometry, and few photon tracks. This method is intended for debugging the photon tracking implementation.

Two optional parameters are allowed:

deviation: It controls the maximum random X and Y direction. 0 by default.
particles: The number of particles to be launched. 10 by default.

Definition at line 608 of file TRestAxionOptics.cxx.

◆ DrawScatterMaps()

TPad * TRestAxionOptics::DrawScatterMaps	(	Double_t	z,
		Double_t	energy = `0`,
		Double_t	deviation = `0`,
		Int_t	particles = `1000`,
		Double_t	focalHint = `7500`
	)

It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class.

Focal position will be searched around focalHint within half a meter range.

Definition at line 800 of file TRestAxionOptics.cxx.

◆ FindFocal()

Double_t TRestAxionOptics::FindFocal	(	Double_t	from,
		Double_t	to,
		Double_t	energy,
		Double_t	precision = `1`,
		Bool_t	recalculate = `false`,
		Int_t	particles = `5000`
	)

virtual

It implements a generic method to identify the optimum focal point. It can be reimplemented at each specific optics class.

It is a statistical method, thus the result contains an implicit statistical error.

It receives 4 arguments.

from and to: They define the range where the focal will be searched for.
precision: It defines the accuracy required
recalculate: If false it will reuse a previous focal point calculation. If true it will force to recalculate the focal point.
particles: Number of particles to be launched in order to calculate the spot size.

Definition at line 695 of file TRestAxionOptics.cxx.

◆ PropagatePhoton()

Double_t TRestAxionOptics::PropagatePhoton	(	const TVector3 &	pos,
		const TVector3 &	dir,
		Double_t	energy
	)

Propagating photon.

We move the particle to the entrance optics plane. We update fEntrancePosition

Now that we are placed at the optics entrance plane. We define the current active mirror (same array index for front and back)

We update the position and direction at the first mirror. We update fFirstInteractionPosition and fMiddleDirection

We move the particle to the entrance optics plane. We update fEntrancePosition

We update the position and direction at the second mirror. We update fSecondInteractionPosition and fExitDirection

Definition at line 382 of file TRestAxionOptics.cxx.

◆ TransportToEntrance()

Int_t TRestAxionOptics::TransportToEntrance	(	const TVector3 &	pos,
		const TVector3 &	dir
	)

protected

It moves the incoming particle at the entrance of the optics plane and returns the region number where the particle is entering.

It updates the value of fEntrancePosition and fEntranceDirection.

If the region is 0, the particle has hit an opaque region and the photon will be lost.

Definition at line 251 of file TRestAxionOptics.cxx.

◆ TransportToExit()

Int_t TRestAxionOptics::TransportToExit	(	const TVector3 &	pos,
		const TVector3 &	dir
	)

protected

It moves the incoming particle to the exit of the optics plane and returns the region number where the particle is entering.

It updates the value of fExitPosition and fExitDirection.

If the region is 0, the particle has hit an opaque region and the photon will be lost.

Definition at line 311 of file TRestAxionOptics.cxx.

◆ TransportToMiddle()

Int_t TRestAxionOptics::TransportToMiddle	(	const TVector3 &	pos,
		const TVector3 &	dir
	)

protected

It moves the incoming particle to the middle of the optics plane and returns the region number where the particle is entering.

It updates the value of fMiddlePosition and fMiddleDirection.

If the region is 0, the particle has hit an opaque region and the photon will be lost.

Definition at line 280 of file TRestAxionOptics.cxx.

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

Detailed Description

Conceptual optics implementation

Optics metadata description

Optical masks

Common drawing methods

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Constructor & Destructor Documentation

◆ TRestAxionOptics()

Member Function Documentation

◆ CalculateSpotSize()

◆ DrawDensityMaps()

◆ DrawParticleTracks()

◆ DrawScatterMaps()

◆ FindFocal()

◆ PropagatePhoton()

◆ TransportToEntrance()

◆ TransportToExit()

◆ TransportToMiddle()