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AliTPCExBTwist Class Reference

AliTPCExBTwist class. More...

#include <AliTPCExBTwist.h>

Inheritance diagram for AliTPCExBTwist:

Public Member Functions

 AliTPCExBTwist ()
 
virtual ~AliTPCExBTwist ()
 
virtual Bool_t AddCorrectionCompact (AliTPCCorrection *corr, Double_t weight)
 
virtual void Init ()
 
virtual void Update (const TTimeStamp &timeStamp)
 
virtual void SetOmegaTauT1T2 (Float_t omegaTau, Float_t t1, Float_t t2)
 
void SetC1C2 (Float_t c1, Float_t c2)
 
Float_t GetC1 () const
 
Float_t GetC2 () const
 
void SetXTwist (Float_t xTwist)
 
void SetYTwist (Float_t yTwist)
 
Float_t GetXTwist () const
 
Float_t GetYTwist () const
 
virtual void Print (const Option_t *option="") const
 
- Public Member Functions inherited from AliTPCCorrection
 AliTPCCorrection ()
 
 AliTPCCorrection (const char *name, const char *title)
 
virtual ~AliTPCCorrection ()
 
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)
 
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)
 
void SetIsLocal (Bool_t isLocal)
 
Bool_t IsLocal () const
 

Private Attributes

Float_t fC1
 coefficient C1 (compare Jim Thomas's notes for definitions) More...
 
Float_t fC2
 coefficient C2 (compare Jim Thomas's notes for definitions) More...
 
Float_t fXTwist
 Twist of E to B field in X-Z [rad]. More...
 
Float_t fYTwist
 Twist of E to B field in Y-Z [rad]. More...
 

Additional Inherited Members

- Public Types inherited from AliTPCCorrection
enum  CompositionType { kParallel, kQueue }
 
- 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)
 
- 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...
 
- 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) 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

AliTPCExBTwist class.

The class calculates the space point distortions due to a mismatch of the E and B field axis (original code from STAR)

It assumes a homogeneous magnetic and electric field. The calculations performed within this class can be written in a compact form as well (compare notes of Jim Thomas)

The inputs to this class are the twist angles in the x and y plane ($,$) in cartesian coordinates. They can be set via the member functions SetXTwist and SetYTwist.

AliTPCExBTwist_h_76e03fd.png
Picture from ROOT macro

Support since 2010: mrain.nosp@m..iva.nosp@m.nov@c.nosp@m.ern..nosp@m.ch

Author
Jim Thomas, Magnus Mager, Stefan Rossegger
Date
27/04/2010

Definition at line 28 of file AliTPCExBTwist.h.

Constructor & Destructor Documentation

AliTPCExBTwist::AliTPCExBTwist ( )

default constructor

Definition at line 28 of file AliTPCExBTwist.cxx.

AliTPCExBTwist::~AliTPCExBTwist ( )
virtual

default destructor

Definition at line 37 of file AliTPCExBTwist.cxx.

Member Function Documentation

Bool_t AliTPCExBTwist::AddCorrectionCompact ( AliTPCCorrection corr,
Double_t  weight 
)
virtual

Add correction and make them compact Assumptions:

  • origin of distortion/correction are additive
  • only correction ot the same type supported ()

Reimplemented from AliTPCCorrection.

Definition at line 42 of file AliTPCExBTwist.cxx.

Float_t AliTPCExBTwist::GetC1 ( ) const
inline

Definition at line 45 of file AliTPCExBTwist.h.

Float_t AliTPCExBTwist::GetC2 ( ) const
inline

Definition at line 46 of file AliTPCExBTwist.h.

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

Calculates the correction of a mismatch between the E and B field axis

Reimplemented from AliTPCCorrection.

Definition at line 97 of file AliTPCExBTwist.cxx.

Float_t AliTPCExBTwist::GetXTwist ( ) const
inline
Float_t AliTPCExBTwist::GetYTwist ( ) const
inline
void AliTPCExBTwist::Init ( )
virtual

Initialization funtion

Reimplemented from AliTPCCorrection.

Definition at line 61 of file AliTPCExBTwist.cxx.

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

Print function to check the settings (e.g. the twist in the X direction) option=="a" prints the C0 and C1 coefficents for calibration purposes

Definition at line 109 of file AliTPCExBTwist.cxx.

void AliTPCExBTwist::SetC1C2 ( Float_t  c1,
Float_t  c2 
)
inline

Definition at line 44 of file AliTPCExBTwist.h.

virtual void AliTPCExBTwist::SetOmegaTauT1T2 ( Float_t  omegaTau,
Float_t  t1,
Float_t  t2 
)
inlinevirtual

Reimplemented from AliTPCCorrection.

Definition at line 39 of file AliTPCExBTwist.h.

Referenced by Init(), MakeComposedCorrection(), RegisterAliTPCExBTwist(), and Update().

void AliTPCExBTwist::SetXTwist ( Float_t  xTwist)
inline
void AliTPCExBTwist::SetYTwist ( Float_t  yTwist)
inline
void AliTPCExBTwist::Update ( const TTimeStamp &  timeStamp)
virtual

Update function

Reimplemented from AliTPCCorrection.

Definition at line 78 of file AliTPCExBTwist.cxx.

Member Data Documentation

Float_t AliTPCExBTwist::fC1
private

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

Definition at line 60 of file AliTPCExBTwist.h.

Referenced by GetC1(), GetCorrection(), Print(), SetC1C2(), and SetOmegaTauT1T2().

Float_t AliTPCExBTwist::fC2
private

coefficient C2 (compare Jim Thomas's notes for definitions)

Definition at line 61 of file AliTPCExBTwist.h.

Referenced by GetC2(), GetCorrection(), Print(), SetC1C2(), and SetOmegaTauT1T2().

Float_t AliTPCExBTwist::fXTwist
private

Twist of E to B field in X-Z [rad].

Definition at line 63 of file AliTPCExBTwist.h.

Referenced by AddCorrectionCompact(), GetCorrection(), GetXTwist(), Print(), and SetXTwist().

Float_t AliTPCExBTwist::fYTwist
private

Twist of E to B field in Y-Z [rad].

Definition at line 64 of file AliTPCExBTwist.h.

Referenced by AddCorrectionCompact(), GetCorrection(), GetYTwist(), Print(), and SetYTwist().


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