AliTPCEfield Class Reference

Calculation of the electric field. More...

#include <AliTPCEfield.h>

Inheritance diagram for AliTPCEfield:

Public Member Functions
	AliTPCEfield ()
	AliTPCEfield (const char *name, Int_t maxFreq, Bool_t is2D, Bool_t useLinear=kTRUE)
virtual	~AliTPCEfield ()
void	SetRange (Double_t x0, Double_t x1, Double_t y0, Double_t y1, Double_t z00, Double_t z1=0)
void	AddBoundaryLine (Double_t x0, Double_t y0, Double_t z0, Double_t v0, Double_t x1, Double_t y1, Double_t z1, Double_t v1, Int_t id=0, Int_t npoints=100)
TTree *	GetTree (const char *tname="Boundary")
void	MakeFitFunctions (Int_t maxFreq)
void	FitField ()
void	DumpField (Double_t gridSize=5, Double_t step=0.5)
Double_t	EvalField (Int_t ifun, Double_t x, Double_t y, Double_t z, Int_t type=0)
Double_t	Eval (Double_t x, Double_t y, Double_t z, Int_t type=0)
Double_t	Field (Int_t ftype, Double_t ifx, Double_t ify, Double_t ifz, Double_t x, Double_t y, Double_t z)
Double_t	FieldDn (Int_t ftype, Double_t ifx, Double_t ify, Double_t ifz, Int_t dn, Double_t x, Double_t y, Double_t z)
TMatrixD *	MakeCorrelation (TMatrixD &matrix)
Double_t	SinHNorm (Double_t x, Double_t norm)
Double_t	CosHNorm (Double_t x, Double_t norm)

Static Public Member Functions
static Double_t	EvalS (Double_t x, Double_t y, Double_t z, Int_t type=0)

Public Attributes
Double_t	fMin [3]
	range of coordinates from Min to Max More...
Double_t	fMax [3]
Double_t	fScale
	scaling factor More...
Int_t	fMaxFreq
	maximal frequency of expansion More...
Bool_t	fIs2D
	flag for 2D field More...
Bool_t	fUseLinear
	flag to use also linear term of the field More...
TTreeSRedirector *	fWorkspace
	! workspace More...
TMatrixD *	fFitFunctions
	fit function description More...
TVectorD *	fFitParam
	fit parameters - coeficients More...
TMatrixD *	fFitCovar
	fit covariance More...
TLinearFitter *	fFitter
	linear fitter - temporary solution - integrals to be calculated More...

Static Public Attributes
static AliTPCEfield *	fgInstance =0
	instance of fied - for visualization More...

Detailed Description

Calculation of the electric field.

Solution of Laplace equation in cartesian system, with boundary condition.

See details: http://web.mit.edu/6.013_book/www/chapter5/5.10.html

Definition at line 16 of file AliTPCEfield.h.

Constructor & Destructor Documentation

AliTPCEfield::AliTPCEfield

(

)

Definition at line 36 of file AliTPCEfield.cxx.

AliTPCEfield::AliTPCEfield	(	const char *	name,
		Int_t	maxFreq,
		Bool_t	is2D,
		Bool_t	useLinear = kTRUE
	)

Definition at line 51 of file AliTPCEfield.cxx.

AliTPCEfield::~AliTPCEfield ( )

virtual

Destructor

Definition at line 124 of file AliTPCEfield.cxx.

Member Function Documentation

void AliTPCEfield::AddBoundaryLine	(	Double_t	x0,
		Double_t	y0,
		Double_t	z0,
		Double_t	v0,
		Double_t	x1,
		Double_t	y1,
		Double_t	z1,
		Double_t	v1,
		Int_t	id = 0,
		Int_t	npoints = 100
	)

Add a e field boundary line From point (x0,y0) to point (x1,y1) Linear decrease of potential is assumed Boundary can be identified using boundary ID The line is written into tree Boundary

Definition at line 142 of file AliTPCEfield.cxx.

Referenced by MakeTPC2DExample().

Double_t AliTPCEfield::CosHNorm ( Double_t  x, Double_t  norm  )

inline

Definition at line 42 of file AliTPCEfield.h.

Referenced by Field(), and FieldDn().

void AliTPCEfield::DumpField	(	Double_t	gridSize = 5,
		Double_t	step = 0.5
	)

Definition at line 380 of file AliTPCEfield.cxx.

Double_t AliTPCEfield::Eval	(	Double_t	x,
		Double_t	y,
		Double_t	z,
		Int_t	type = 0
	)

Evaluate function ifun at position gx amd gy type == 0 - field == 1 - Ex == 2 - Ey == 3 - Ez

Definition at line 278 of file AliTPCEfield.cxx.

Referenced by DumpField(), and EvalS().

Double_t AliTPCEfield::EvalField	(	Int_t	ifun,
		Double_t	x,
		Double_t	y,
		Double_t	z,
		Int_t	type = 0
	)

Evaluate function ifun at position gx amd gy type == 0 - field == 1 - Ex == 2 - Ey == 3 - Ez

Definition at line 260 of file AliTPCEfield.cxx.

Referenced by Eval(), and FitField().

Double_t AliTPCEfield::EvalS ( Double_t  x, Double_t  y, Double_t  z, Int_t  type = 0  )

static

static evaluation - possible to use it in the TF1

Definition at line 298 of file AliTPCEfield.cxx.

Double_t AliTPCEfield::Field	(	Int_t	ftype,
		Double_t	ifx,
		Double_t	ify,
		Double_t	ifz,
		Double_t	x,
		Double_t	y,
		Double_t	z
	)

Field component in f frequency

Definition at line 175 of file AliTPCEfield.cxx.

Referenced by EvalField().

Double_t AliTPCEfield::FieldDn	(	Int_t	ftype,
		Double_t	ifx,
		Double_t	ify,
		Double_t	ifz,
		Int_t	dn,
		Double_t	x,
		Double_t	y,
		Double_t	z
	)

Field component in f frequency

Definition at line 213 of file AliTPCEfield.cxx.

Referenced by EvalField().

void AliTPCEfield::FitField

(

)

Fit the e field Minimize chi2 residuals at the boundary points ?Tempoary sollution - integrals can be calculated analytically -

Definition at line 304 of file AliTPCEfield.cxx.

TTree * AliTPCEfield::GetTree

(

const char *

tname = "Boundary"

)

Definition at line 169 of file AliTPCEfield.cxx.

Referenced by FitField().

TMatrixD * AliTPCEfield::MakeCorrelation

(

TMatrixD &

matrix

)

Definition at line 365 of file AliTPCEfield.cxx.

void AliTPCEfield::MakeFitFunctions

(

Int_t

maxFreq

)

fit functions = \( f(x,y,z) = fx(x)*fy(y)*fz(z) \) function can be of following types: 0 - constant 1 - linear 2 - hypx 3 - hypy 4 - hypz

Definition at line 69 of file AliTPCEfield.cxx.

Referenced by AliTPCEfield().

void AliTPCEfield::SetRange	(	Double_t	x0,
		Double_t	x1,
		Double_t	y0,
		Double_t	y1,
		Double_t	z00,
		Double_t	z1 = 0
	)

Set the ranges - coordinates are rescaled in order to use proper cos,sin expansion in scaled space

Definition at line 130 of file AliTPCEfield.cxx.

Referenced by MakeTPC2DExample().

Double_t AliTPCEfield::SinHNorm ( Double_t  x, Double_t  norm  )

inline

Definition at line 41 of file AliTPCEfield.h.

Referenced by Field(), and FieldDn().

Member Data Documentation

TMatrixD* AliTPCEfield::fFitCovar

fit covariance

Definition at line 54 of file AliTPCEfield.h.

Referenced by FitField(), and MakeFitFunctions().

TMatrixD* AliTPCEfield::fFitFunctions

fit function description

Definition at line 52 of file AliTPCEfield.h.

Referenced by Eval(), EvalField(), FitField(), and MakeFitFunctions().

TVectorD* AliTPCEfield::fFitParam

fit parameters - coeficients

Definition at line 53 of file AliTPCEfield.h.

Referenced by FitField(), and MakeFitFunctions().

TLinearFitter* AliTPCEfield::fFitter

linear fitter - temporary solution - integrals to be calculated

Definition at line 55 of file AliTPCEfield.h.

Referenced by FitField().

AliTPCEfield * AliTPCEfield::fgInstance =0

static

instance of fied - for visualization

Definition at line 56 of file AliTPCEfield.h.

Referenced by AliTPCEfield(), and EvalS().

Bool_t AliTPCEfield::fIs2D

flag for 2D field

Definition at line 48 of file AliTPCEfield.h.

Referenced by MakeFitFunctions(), and SetRange().

Double_t AliTPCEfield::fMax[3]

Definition at line 45 of file AliTPCEfield.h.

Referenced by AliTPCEfield(), DumpField(), Eval(), FitField(), and SetRange().

Int_t AliTPCEfield::fMaxFreq

maximal frequency of expansion

Definition at line 47 of file AliTPCEfield.h.

Referenced by DumpField().

Double_t AliTPCEfield::fMin[3]

range of coordinates from Min to Max

Definition at line 44 of file AliTPCEfield.h.

Referenced by AliTPCEfield(), DumpField(), Eval(), FitField(), and SetRange().

Double_t AliTPCEfield::fScale

scaling factor

Definition at line 46 of file AliTPCEfield.h.

Referenced by DumpField(), Eval(), FitField(), and SetRange().

Bool_t AliTPCEfield::fUseLinear

flag to use also linear term of the field

Definition at line 49 of file AliTPCEfield.h.

Referenced by MakeFitFunctions().

TTreeSRedirector* AliTPCEfield::fWorkspace

! workspace

Definition at line 51 of file AliTPCEfield.h.

Referenced by AliTPCEfield(), GetTree(), and ~AliTPCEfield().

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

• TPC/AliTPCEfield.h
• TPC/AliTPCEfield.cxx