This implementation AliTPCExB is using an "exact" calculation of the ExB effect. More...

#include <AliTPCExBExact.h>

Inheritance diagram for AliTPCExBExact:

Public Member Functions
	AliTPCExBExact ()

	AliTPCExBExact (const AliMagF *bField, Double_t driftVelocity, Int_t n=100, Int_t nx=30, Int_t ny=30, Int_t nz=100)

virtual	~AliTPCExBExact ()

virtual void	Correct (const Double_t position, Double_t corrected)

void	TestThisBeautifulObject (const AliMagF bField, const char fileName)

Public Member Functions inherited from AliTPCExB
	AliTPCExB ()

AliTPCExB &	operator= (const AliTPCExB &exb)

	AliTPCExB (const AliTPCExB &exb)

virtual	~AliTPCExB ()

virtual void	CorrectInverse (const Double_t position, Double_t corrected)

void	TestExB (const char *fileName)

Double_t	Eval (Int_t type, Double_t r, Double_t phi, Double_t z)

Double_t	SEval (Int_t type, Double_t r, Double_t phi, Double_t z)

Protected Attributes
Double_t	fDriftVelocity
	The electron drift velocity. More...

Private Member Functions
AliTPCExBExact &	operator= (const AliTPCExBExact &)

	AliTPCExBExact (const AliTPCExBExact &)

void	TestThisBeautifulObjectGeneric (const char *fileName)

void	CreateLookupTable ()

void	GetE (Double_t e, const Double_t x) const

void	GetB (Double_t b, const Double_t x) const

void	Motion (const Double_t x, Double_t t, Double_t dxdt) const

void	CalculateDistortion (const Double_t x, Double_t dist) const

void	DGLStep (Double_t *x, Double_t t, Double_t h) const

Private Attributes
const AliMagF *	fkField
	! the magnetic field as supplied by the user More...

Int_t	fkN
	max number of integration steps More...

Int_t	fkNX
	field mesh points in x direction More...

Int_t	fkNY
	field mesh points in y direction More...

Int_t	fkNZ
	field mesh points in z direction More...

Double_t	fkXMin
	the first grid point in x direction More...

Double_t	fkXMax
	the last grid point in x direction More...

Double_t	fkYMin
	the first grid point in y direction More...

Double_t	fkYMax
	the last grid point in y direction More...

Double_t	fkZMin
	the first grid point in z direction More...

Double_t	fkZMax
	the last grid point in z direction More...

Int_t	fkNLook

Double_t *	fkLook
	the great lookup table More...

Static Private Attributes
static const Double_t	fgkEM =1.602176487e-19/9.10938215e-31
	! elementary charge over electron mass (C/kg) More...

static const Double_t	fgkDriftField =-40.e3
	! the TPC drift field (V/m) (modulus) More...

Additional Inherited Members
Static Public Member Functions inherited from AliTPCExB
static Double_t	GetDr (Double_t r, Double_t phi, Double_t z, Double_t bz=5)

static Double_t	GetDrphi (Double_t r, Double_t phi, Double_t z, Double_t bz=5)

static Double_t	GetDphi (Double_t r, Double_t phi, Double_t z, Double_t bz=5)

static Double_t	GetDz (Double_t r, Double_t phi, Double_t z, Double_t bz=5)

static AliTPCExB *	Instance ()

static void	SetInstance (AliTPCExB *const param)

static void	RegisterField (Int_t index, AliMagF *magf)

static Double_t	GetBx (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBy (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBz (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBr (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBrfi (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBxI (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetByI (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBzI (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBrI (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	GetBrfiI (Double_t r, Double_t phi, Double_t z, Int_t index=0)

static Double_t	EvalMat (const TVectorD &vec, Double_t r, Double_t phi, Double_t z)

Detailed Description

This implementation AliTPCExB is using an "exact" calculation of the ExB effect.

An exact implementation of the ExB effect.

That is, it uses the drift ODE to calculate the distortion without any further assumption. Due to the numerical integration of the ODE, there are some numerical uncertencies involed.

Definition at line 14 of file AliTPCExBExact.h.

Constructor & Destructor Documentation

AliTPCExBExact::AliTPCExBExact ( )

purely for I/O

Definition at line 36 of file AliTPCExBExact.cxx.

AliTPCExBExact::AliTPCExBExact	(	const AliMagF *	bField,
		Double_t	driftVelocity,
		Int_t	n = `100`,
		Int_t	nx = `30`,
		Int_t	ny = `30`,
		Int_t	nz = `100`
	)

The constructor. One has to supply a magnetic field and an (initial) drift velocity. Since some kind of lookuptable is created the number of its meshpoints can be supplied. n sets the number of integration steps to be used when integrating over the full drift length.

Definition at line 48 of file AliTPCExBExact.cxx.

AliTPCExBExact::~AliTPCExBExact ( )

virtual

destruct the poor object.

Definition at line 108 of file AliTPCExBExact.cxx.

AliTPCExBExact::AliTPCExBExact ( const AliTPCExBExact & )

private

Member Function Documentation

void AliTPCExBExact::CalculateDistortion	(	const Double_t *	x,
		Double_t *	dist
	)		const

private

Helper function that calculates one distortion by integration (only used to fill the lookup table).

Definition at line 300 of file AliTPCExBExact.cxx.

Referenced by CreateLookupTable(), and TestThisBeautifulObjectGeneric().

void AliTPCExBExact::Correct	(	const Double_t *	position,
		Double_t *	corrected
	)

virtual

correct for the distortion

Implements AliTPCExB.

Definition at line 114 of file AliTPCExBExact.cxx.

Referenced by TestThisBeautifulObjectGeneric().

void AliTPCExBExact::CreateLookupTable ( )

private

Helper function to fill the lookup table.

Definition at line 230 of file AliTPCExBExact.cxx.

Referenced by AliTPCExBExact().

void AliTPCExBExact::DGLStep	(	Double_t *	x,
		Double_t	t,
		Double_t	h
	)		const

private

An elementary integration step. (simple Euler Method)

Definition at line 335 of file AliTPCExBExact.cxx.

Referenced by CalculateDistortion().

void AliTPCExBExact::GetB	(	Double_t *	b,
		const Double_t *	x
	)		const

private

Helper function returning the B field in SI units (T).

Definition at line 259 of file AliTPCExBExact.cxx.

Referenced by Motion(), and TestThisBeautifulObjectGeneric().

void AliTPCExBExact::GetE	(	Double_t *	e,
		const Double_t *	x
	)		const

private

Helper function returning the E field in SI units (V/m).

Definition at line 251 of file AliTPCExBExact.cxx.

Referenced by Motion().

void AliTPCExBExact::Motion	(	const Double_t *	x,
		Double_t	t,
		Double_t *	dxdt
	)		const

private

The differential equation of motion of the electrons.

Definition at line 274 of file AliTPCExBExact.cxx.

Referenced by DGLStep().

AliTPCExBExact& AliTPCExBExact::operator= ( const AliTPCExBExact & )

private

void AliTPCExBExact::TestThisBeautifulObject	(	const AliMagF *	bField,
		const char *	fileName
	)

Have a look at the common part "TestThisBeautifulObjectGeneric".

Definition at line 171 of file AliTPCExBExact.cxx.

void AliTPCExBExact::TestThisBeautifulObjectGeneric ( const char * fileName )

private

Well, as the name sais... it tests the object.

Definition at line 180 of file AliTPCExBExact.cxx.

Referenced by TestThisBeautifulObject().

Member Data Documentation

Double_t AliTPCExBExact::fDriftVelocity

protected

The electron drift velocity.

Definition at line 25 of file AliTPCExBExact.h.

Referenced by CalculateDistortion(), and Motion().

const Double_t AliTPCExBExact::fgkDriftField =-40.e3

staticprivate

! the TPC drift field (V/m) (modulus)

Definition at line 52 of file AliTPCExBExact.h.

Referenced by GetE(), and Motion().

const Double_t AliTPCExBExact::fgkEM =1.602176487e-19/9.10938215e-31

staticprivate

! elementary charge over electron mass (C/kg)

Definition at line 51 of file AliTPCExBExact.h.

Referenced by Motion().

const AliMagF* AliTPCExBExact::fkField

private

! the magnetic field as supplied by the user

Definition at line 37 of file AliTPCExBExact.h.

Referenced by GetB(), and TestThisBeautifulObject().

Double_t* AliTPCExBExact::fkLook

private

the great lookup table

Definition at line 50 of file AliTPCExBExact.h.

Referenced by Correct(), CreateLookupTable(), and ~AliTPCExBExact().

Int_t AliTPCExBExact::fkN

private

max number of integration steps

Definition at line 38 of file AliTPCExBExact.h.

Referenced by CalculateDistortion().

Int_t AliTPCExBExact::fkNLook

private

size of the lookup table

Definition at line 48 of file AliTPCExBExact.h.

Referenced by CreateLookupTable().

Int_t AliTPCExBExact::fkNX

private

field mesh points in x direction

Definition at line 39 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Int_t AliTPCExBExact::fkNY

private

field mesh points in y direction

Definition at line 40 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Int_t AliTPCExBExact::fkNZ

private

field mesh points in z direction

Definition at line 41 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkXMax

private

the last grid point in x direction

Definition at line 43 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkXMin

private

the first grid point in x direction

Definition at line 42 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkYMax

private

the last grid point in y direction

Definition at line 45 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkYMin

private

the first grid point in y direction

Definition at line 44 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkZMax

private

the last grid point in z direction

Definition at line 47 of file AliTPCExBExact.h.

Referenced by Correct(), and CreateLookupTable().

Double_t AliTPCExBExact::fkZMin

private

the first grid point in z direction

Definition at line 46 of file AliTPCExBExact.h.

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

TPC/TPCbase/AliTPCExBExact.h
TPC/TPCbase/AliTPCExBExact.cxx

Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation