#include <AliTPCGGVoltError.h>

Inheritance diagram for AliTPCGGVoltError:

Public Member Functions
	AliTPCGGVoltError ()

virtual	~AliTPCGGVoltError ()

virtual void	Init ()

virtual void	Update (const TTimeStamp &timeStamp)

virtual void	SetOmegaTauT1T2 (Float_t omegaTau, Float_t t1, Float_t t2)

void	SetC0C1 (Double_t c0, Double_t c1)

Float_t	GetC0 () const

Float_t	GetC1 () const

void	SetDeltaVGGA (Double_t deltaVGGA)

void	SetDeltaVGGC (Double_t deltaVGGC)

Double_t	GetDeltaVGGA () const

Double_t	GetDeltaVGGC () const

void	InitGGVoltErrorDistortion ()

Float_t	GetIntErOverEz (const Float_t x[], const Short_t roc)

virtual void	Print (const Option_t *option="") const

Public Member Functions inherited from AliTPCCorrection
	AliTPCCorrection ()

	AliTPCCorrection (const char name, const char title)

virtual	~AliTPCCorrection ()

virtual Bool_t	AddCorrectionCompact (AliTPCCorrection *corr, Double_t weight)

void	CorrectPoint (Float_t x[], Short_t roc)

void	CorrectPointLocal (Float_t x[], Short_t roc)

void	CorrectPoint (const Float_t x[], Short_t roc, Float_t xp[])

virtual void	GetCorrectionDz (const Float_t x[], Short_t roc, Float_t dx[], Float_t delta)

virtual void	GetCorrectionIntegralDz (const Float_t x[], Short_t roc, Float_t dx[], Float_t delta)

void	DistortPoint (Float_t x[], Short_t roc)

void	DistortPointLocal (Float_t x[], Short_t roc)

void	DistortPoint (const Float_t x[], Short_t roc, Float_t xp[])

virtual void	GetDistortion (const Float_t x[], Short_t roc, Float_t dx[])

virtual void	GetDistortionDz (const Float_t x[], Short_t roc, Float_t dx[], Float_t delta)

virtual void	GetDistortionIntegralDz (const Float_t x[], Short_t roc, Float_t dx[], Float_t delta)

virtual void	SetCorrScaleFactor (Float_t)

virtual Float_t	GetCorrScaleFactor () const

virtual void	Print (Option_t *option="") const

TH2F *	CreateHistoDRinXY (Float_t z=10., Int_t nx=100, Int_t ny=100)

TH2F *	CreateHistoDRPhiinXY (Float_t z=10., Int_t nx=100, Int_t nphi=100)

TH2F *	CreateHistoDZinXY (Float_t z=10., Int_t nx=100, Int_t ny=100)

TH2F *	CreateHistoDRinZR (Float_t phi=0., Int_t nZ=100, Int_t nR=100)

TH2F *	CreateHistoDRPhiinZR (Float_t phi=0., Int_t nZ=100, Int_t nR=100)

TH2F *	CreateHistoDZinZR (Float_t phi=0., Int_t nZ=100, Int_t nR=100)

TH2F *	CreateHistoDRinPhiR (Float_t z=10., Int_t nPhi=180, Int_t nR=100, Bool_t useSector=kTRUE, Float_t shift=0.)

TH2F *	CreateHistoDRPhiinPhiR (Float_t z=10., Int_t nPhi=180, Int_t nR=100, Bool_t useSector=kTRUE, Float_t shift=0.)

TH2F *	CreateHistoDZinPhiR (Float_t z=10., Int_t nPhi=180, Int_t nR=100, Bool_t useSector=kTRUE, Float_t shift=0.)

TTree *	CreateDistortionTree (Double_t step=5, Int_t type=0)

AliExternalTrackParam *	FitDistortedTrack (AliExternalTrackParam &trackIn, Double_t refX, Int_t dir, TTreeSRedirector *pcstream)

void	StoreInOCDB (Int_t startRun, Int_t endRun, const char *comment=0)

void	FastSimDistortedVertex (Double_t orgVertex[3], Int_t nTracks, AliESDVertex &aV, AliESDVertex &avOrg, AliESDVertex &cV, AliESDVertex &cvOrg, TTreeSRedirector *const pcstream, Double_t etaCuts)

Protected Member Functions
virtual void	GetCorrection (const Float_t x[], const Short_t roc, Float_t dx[])

Protected Member Functions inherited from AliTPCCorrection
TH2F *	CreateTH2F (const char name, const char title, const char xlabel, const char ylabel, const char *zlabel, Int_t nbinsx, Double_t xlow, Double_t xup, Int_t nbinsy, Double_t ylow, Double_t yup)

void	Interpolate2DEdistortion (Int_t order, Double_t r, Double_t z, const Double_t er[kNZ][kNR], Double_t &erValue)

void	Interpolate3DEdistortion (Int_t order, Double_t r, Float_t phi, Double_t z, const Double_t er[kNZ][kNPhi][kNR], const Double_t ephi[kNZ][kNPhi][kNR], const Double_t ez[kNZ][kNPhi][kNR], Double_t &erValue, Double_t &ephiValue, Double_t &ezValue)

Double_t	Interpolate2DTable (Int_t order, Double_t x, Double_t y, Int_t nx, Int_t ny, const Double_t xv[], const Double_t yv[], const TMatrixD &array)

Double_t	Interpolate3DTable (Int_t order, Double_t x, Double_t y, Double_t z, Int_t nx, Int_t ny, Int_t nz, const Double_t xv[], const Double_t yv[], const Double_t zv[], TMatrixD **arrayofArrays)

Double_t	Interpolate (const Double_t xArray[], const Double_t yArray[], Int_t order, Double_t x)

void	Search (Int_t n, const Double_t xArray[], Double_t x, Int_t &low)

Float_t	Interpolate2DTable (Int_t order, Double_t x, Double_t y, Int_t nx, Int_t ny, const Double_t xv[], const Double_t yv[], const TMatrixF &array)

Float_t	Interpolate3DTable (Int_t order, Double_t x, Double_t y, Double_t z, Int_t nx, Int_t ny, Int_t nz, const Double_t xv[], const Double_t yv[], const Double_t zv[], TMatrixF **arrayofArrays)

Float_t	Interpolate (const Double_t xArray[], const Float_t yArray[], Int_t order, Double_t x)

virtual Int_t	IsPowerOfTwo (Int_t i) const

void	PoissonRelaxation2D (TMatrixD &arrayV, TMatrixD &chargeDensity, TMatrixD &arrayErOverEz, TMatrixD &arrayDeltaEz, Int_t rows, Int_t columns, Int_t iterations, Bool_t rocDisplacement=kTRUE)

void	PoissonRelaxation3D (TMatrixD arrayofArrayV, TMatrixD arrayofChargeDensities, TMatrixD arrayofEroverEz, TMatrixD arrayofEPhioverEz, TMatrixD **arrayofEz, Int_t rows, Int_t columns, Int_t phislices, Float_t deltaphi, Int_t iterations, Int_t summetry, Bool_t rocDisplacement=kTRUE, IntegrationType integrationType=kIntegral)

void	SetIsLocal (Bool_t isLocal)

Bool_t	IsLocal () const

Private Attributes
Float_t	fC0
	coefficient C0 (compare Jim Thomas's notes for definitions) More...

Float_t	fC1
	coefficient C1 (compare Jim Thomas's notes for definitions) More...

Double_t	fDeltaVGGA
	Missmatch of gating grid voltage on A-side [V]. More...

Double_t	fDeltaVGGC
	Missmatch of gating grid voltage on C-side [V]. More...

Double_t	fGGVoltErrorER [kNZ][kNR]
	Array to store electric field for GGVoltError calculation. More...

Bool_t	fInitLookUp
	flag to check it the Look Up table was created More...

Additional Inherited Members
Public Types inherited from AliTPCCorrection
enum	CompositionType { kParallel, kQueue }

enum	IntegrationType { kIntegral, kDifferential }

Static Public Member Functions inherited from AliTPCCorrection
static void	MakeDistortionMap (THnSparse his0, TTreeSRedirector pcstream, const char *hname, Int_t run, Float_t refX, Int_t type, Int_t integ=1)

static void	MakeDistortionMapCosmic (THnSparse his0, TTreeSRedirector pcstream, const char *hname, Int_t run, Float_t refX, Int_t type)

static void	MakeDistortionMapSector (THnSparse his0, TTreeSRedirector pcstream, const char *hname, Int_t run, Int_t type)

static void	MakeTrackDistortionTree (TTree tinput, Int_t dtype, Int_t ptype, const TObjArray corrArray, Int_t step=1, Int_t offset=0, Bool_t debug=0)

static void	MakeSectorDistortionTree (TTree tinput, Int_t dtype, Int_t ptype, const TObjArray corrArray, Int_t step=1, Int_t offset=0, Bool_t debug=0)

static void	MakeLaserDistortionTreeOld (TTree tree, TObjArray corrArray, Int_t itype)

static void	MakeLaserDistortionTree (TTree tree, TObjArray corrArray, Int_t itype)

static void	AddVisualCorrection (AliTPCCorrection *corr, Int_t position)

static AliTPCCorrection *	GetVisualCorrection (Int_t position)

static AliTPCCorrection *	GetVisualCorrection (const char *corName)

static TObjArray *	GetVisualCorrections ()

static Double_t	GetCorrSector (Double_t sector, Double_t r, Double_t kZ, Int_t axisType, Int_t corrType=0)

static Double_t	GetCorrXYZ (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0)

static Double_t	GetCorrXYZDz (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0, Double_t delta=5)

static Double_t	GetCorrXYZIntegrateZ (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0, Double_t delta=5)

static Double_t	GetDistXYZ (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0)

static Double_t	GetDistXYZDz (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0, Double_t delta=5)

static Double_t	GetDistXYZIntegrateZ (Double_t gx, Double_t gy, Double_t gz, Int_t axisType, Int_t corrType=0, Double_t delta=5)

static Double_t	GetCorrectionSector (Double_t sector, Double_t r, Double_t kZ, Int_t axisType, Int_t corrType=0)

static Double_t	GetDistortionSector (Double_t sector, Double_t r, Double_t kZ, Int_t axisType, Int_t corrType=0)

Protected Types inherited from AliTPCCorrection
enum	{ kNR = 72 }

enum	{ kNPhi = 18*10+1 }

enum	{ kNZ = 166 }

Protected Attributes inherited from AliTPCCorrection
Double_t	fgkRList [kNR]
	points in the radial direction (for the lookup table) More...

Double_t	fgkPhiList [kNPhi]
	points in the phi direction (for the lookup table) More...

Double_t	fgkZList [kNZ]
	points in the z direction (for the lookup table) More...

Int_t	fILow

Int_t	fJLow

Int_t	fKLow
	variable to help in the interpolation More...

Double_t	fT1
	tensor term of wt - T1 More...

Double_t	fT2
	tensor term of wt - T2 More...

Bool_t	fIsLocal
	switch to indicate that the distortion is a local vector drphi/dz, dr/dz More...

IntegrationType	fIntegrationType
	Presentation of the underlying corrections, integrated, or differential. More...

Static Protected Attributes inherited from AliTPCCorrection
static const Double_t	fgkTPCZ0 = 249.7
	nominal gating grid position More...

static const Double_t	fgkIFCRadius = 83.5
	Mean Radius of the Inner Field Cage ( 82.43 min, 83.70 max) (cm)/hera/alice/wiechula/calib/guiTrees. More...

static const Double_t	fgkOFCRadius = 254.5
	Mean Radius of the Outer Field Cage (252.55 min, 256.45 max) (cm) More...

static const Double_t	fgkZOffSet = 0.2
	Offset from CE: calculate all distortions closer to CE as if at this point. More...

static const Double_t	fgkCathodeV = -100000.0
	Cathode Voltage (volts) More...

static const Double_t	fgkGG = -70.0
	Gating Grid voltage (volts) More...

static const Double_t	fgkdvdE = 0.0024
	[cm/V] drift velocity dependency on the E field (from Magboltz for NeCO2N2 at standard environment) More...

static const Double_t	fgkEM = -1.602176487e-19/9.10938215e-31
	charge/mass in [C/kg] More...

static const Double_t	fgke0 = 8.854187817e-12
	vacuum permittivity [A·s/(V·m)] More...

static TObjArray *	fgVisualCorrection =0
	array of orrection for visualization More...

Detailed Description

AliTPCGGVoltError class.

The class calculates the electric field and the resulting space point distortions due a Gating Grid (GG) voltage error. It uses the analytical solution for such a problem.

The input is the effective GG voltage residual in respect to the ideal setting. The effective residual voltage can be set via the functions SetDeltaVGGx. Note that this effective voltage-residuals are approx. a factor 0.9 lower than the actual difference in the setting of the GG due to the fact that the voltage on the GG is partially screened by the wire structure. The calculation has to be performed with the observable effective voltage difference.

Unfortunately, the class is not capable of calculation the $dz$ offset due to possible changes of the drift velocity in dependence of the electric field. The special case of the numerical approximation (AliTPCBoundaryVoltError), which is capable of calculating the same effect, should be used for this purpose.

Picture from ROOT macro

Author: Jim Thomas, Stefan Rossegger, Magnus Mager

Date: 27/04/2010

Definition at line 31 of file AliTPCGGVoltError.h.

Constructor & Destructor Documentation

AliTPCGGVoltError::AliTPCGGVoltError ( )

default constructor

Definition at line 29 of file AliTPCGGVoltError.cxx.

AliTPCGGVoltError::~AliTPCGGVoltError ( )

virtual

default destructor

Definition at line 39 of file AliTPCGGVoltError.cxx.

Member Function Documentation

Float_t AliTPCGGVoltError::GetC0 ( ) const

inline

Definition at line 48 of file AliTPCGGVoltError.h.

Float_t AliTPCGGVoltError::GetC1 ( ) const

inline

Definition at line 49 of file AliTPCGGVoltError.h.

void AliTPCGGVoltError::GetCorrection	(	const Float_t	x[],
		const Short_t	roc,
		Float_t	dx[]
	)

protectedvirtual

Gated Grid Voltage Error

Calculates the effect of having an incorrect voltage on the A or C end plate Gated Grids.

Electrostatic Equations from StarNote SN0253 by Howard Wieman.

Reimplemented from AliTPCCorrection.

Definition at line 80 of file AliTPCGGVoltError.cxx.

Referenced by GetDeltaVGGC().

Double_t AliTPCGGVoltError::GetDeltaVGGA ( ) const

inline

Definition at line 54 of file AliTPCGGVoltError.h.

Double_t AliTPCGGVoltError::GetDeltaVGGC ( ) const

inline

Definition at line 55 of file AliTPCGGVoltError.h.

Float_t AliTPCGGVoltError::GetIntErOverEz	(	const Float_t	x[],
		const Short_t	roc
	)

This function is purely for calibration purposes Calculates the integral (int Er/Ez dz) for the setted GG voltage offset

Definition at line 133 of file AliTPCGGVoltError.cxx.

Referenced by GetDeltaVGGC().

void AliTPCGGVoltError::Init ( )

virtual

Init function

Reimplemented from AliTPCCorrection.

Definition at line 44 of file AliTPCGGVoltError.cxx.

void AliTPCGGVoltError::InitGGVoltErrorDistortion ( )

Initialization of the Lookup table which contains the solutions of the GG Error problem

Definition at line 169 of file AliTPCGGVoltError.cxx.

Referenced by AliTPCCorrectionDemo(), GetDeltaVGGC(), Init(), and MakeDistortionMap().

void AliTPCGGVoltError::Print ( const Option_t * option = "" ) const

virtual

Print function to check the settings (e.g. voltage offsets) option=="a" prints the C0 and C1 coefficents for calibration purposes

Definition at line 215 of file AliTPCGGVoltError.cxx.

Referenced by GetDeltaVGGC().

void AliTPCGGVoltError::SetC0C1	(	Double_t	c0,
		Double_t	c1
	)

inline

Definition at line 47 of file AliTPCGGVoltError.h.

void AliTPCGGVoltError::SetDeltaVGGA ( Double_t deltaVGGA )

inline

Definition at line 52 of file AliTPCGGVoltError.h.

Referenced by AliTPCCorrectionDemo(), MakeComposedCorrection(), and MakeDistortionMap().

void AliTPCGGVoltError::SetDeltaVGGC ( Double_t deltaVGGC )

inline

Definition at line 53 of file AliTPCGGVoltError.h.

Referenced by AliTPCCorrectionDemo(), MakeComposedCorrection(), and MakeDistortionMap().

virtual void AliTPCGGVoltError::SetOmegaTauT1T2	(	Float_t	omegaTau,
		Float_t	t1,
		Float_t	t2
	)

inlinevirtual

Reimplemented from AliTPCCorrection.

Definition at line 41 of file AliTPCGGVoltError.h.

Referenced by Init(), and Update().

void AliTPCGGVoltError::Update ( const TTimeStamp & timeStamp )

virtual

Update function

Reimplemented from AliTPCCorrection.

Definition at line 62 of file AliTPCGGVoltError.cxx.

Member Data Documentation

Float_t AliTPCGGVoltError::fC0

private

coefficient C0 (compare Jim Thomas's notes for definitions)

Definition at line 67 of file AliTPCGGVoltError.h.

Referenced by GetC0(), GetCorrection(), Print(), SetC0C1(), and SetOmegaTauT1T2().

Float_t AliTPCGGVoltError::fC1

private

coefficient C1 (compare Jim Thomas's notes for definitions)

Definition at line 68 of file AliTPCGGVoltError.h.

Referenced by GetC1(), GetCorrection(), Print(), SetC0C1(), and SetOmegaTauT1T2().

Double_t AliTPCGGVoltError::fDeltaVGGA

private

Missmatch of gating grid voltage on A-side [V].

Definition at line 70 of file AliTPCGGVoltError.h.

Referenced by GetCorrection(), GetDeltaVGGA(), GetIntErOverEz(), Print(), and SetDeltaVGGA().

Double_t AliTPCGGVoltError::fDeltaVGGC

private

Missmatch of gating grid voltage on C-side [V].

Definition at line 71 of file AliTPCGGVoltError.h.

Referenced by GetCorrection(), GetDeltaVGGC(), GetIntErOverEz(), Print(), and SetDeltaVGGC().

Double_t AliTPCGGVoltError::fGGVoltErrorER[kNZ][kNR]

private

Array to store electric field for GGVoltError calculation.

Definition at line 72 of file AliTPCGGVoltError.h.

Referenced by GetCorrection(), GetIntErOverEz(), and InitGGVoltErrorDistortion().

Bool_t AliTPCGGVoltError::fInitLookUp

private

flag to check it the Look Up table was created

Definition at line 74 of file AliTPCGGVoltError.h.

Referenced by GetCorrection(), GetIntErOverEz(), InitGGVoltErrorDistortion(), and Print().

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

TPC/TPCbase/AliTPCGGVoltError.h
TPC/TPCbase/AliTPCGGVoltError.cxx

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation