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AliTPCGGVoltError Class Reference

AliTPCGGVoltError class. More...

#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)
 
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 AliTPCCorrectionGetVisualCorrection (Int_t position)
 
static AliTPCCorrectionGetVisualCorrection (const char *corName)
 
static TObjArrayGetVisualCorrections ()
 
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 TObjArrayfgVisualCorrection =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.

AliTPCGGVoltError_h_359f7ec.png
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.

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.

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(), 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.

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
void AliTPCGGVoltError::SetDeltaVGGC ( Double_t  deltaVGGC)
inline
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: