-
-// Author: ruben.shahoyan@cern.ch 20/03/2007
-
-///////////////////////////////////////////////////////////////////////////////////
-// //
-// Wrapper for the set of mag.field parameterizations by Chebyshev polinomials //
-// To obtain the field in cartesian coordinates/components use //
-// Field(float* xyz, float* bxyz); //
-// For cylindrical coordinates/components: //
-// FieldCyl(float* rphiz, float* brphiz) //
-// //
-// The solenoid part is parameterized in the volume R<500, -550<Z<550 cm //
-// //
-// The region R<423 cm, -343.3<Z<481.3 for 30kA and -343.3<Z<481.3 for 12kA //
-// is parameterized using measured data while outside the Tosca calculation //
-// is used (matched to data on the boundary of the measurements) //
-// //
-// Two options are possible: //
-// 1) _BRING_TO_BOUNDARY_ is defined in the AliCheb3D: //
-// If the querried point is outside of the validity region then the field //
-// at the closest point on the fitted surface is returned. //
-// 2) _BRING_TO_BOUNDARY_ is not defined in the AliCheb3D: //
-// If the querried point is outside of the validity region the return //
-// value for the field components are set to 0. //
-// //
-// To obtain the field integral in the TPC region from given point to nearest //
-// cathod plane (+- 250 cm) use: //
-// GetTPCInt(float* xyz, float* bxyz); for Cartesian frame //
-// or //
-// GetTPCIntCyl(Float_t *rphiz, Float_t *b); for Cylindrical frame //
-// //
-// //
-// The units are kiloGauss and cm. //
-// //
-///////////////////////////////////////////////////////////////////////////////////
-
#ifndef ALIMAGFCHEB_H
#define ALIMAGFCHEB_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice */
-#include <TMath.h>
-#include <TNamed.h>
-#include "AliCheb3D.h"
+//
+// Interface between the AliMagWrapCheb and AliMagF: set of magnetic field data + Tosca
+// parameterization by Chebyshev polynomials
+//
+// Author: ruben.shahoyan@cern.ch
+//
-class TSystem;
+#include "AliMagFC.h"
+class AliMagWrapCheb;
-class AliMagFCheb: public TNamed
+
+class AliMagFCheb : public AliMagFC
{
- public:
+public:
+ enum constants {k2kG, k4kG, k5kG};
AliMagFCheb();
- AliMagFCheb(const AliMagFCheb& src);
- ~AliMagFCheb() {Clear();}
- //
- void CopyFrom(const AliMagFCheb& src);
- AliMagFCheb& operator=(const AliMagFCheb& rhs);
- virtual void Clear(const Option_t * = "");
- //
- Int_t GetNParamsSol() const {return fNParamsSol;}
- Int_t GetNSegZSol() const {return fNSegZSol;}
- Float_t* GetSegZSol() const {return fSegZSol;}
- //
- Int_t GetNParamsTPCInt() const {return fNParamsTPCInt;}
- Int_t GetNSegZTPCInt() const {return fNSegZTPCInt;}
- //
- Int_t GetNParamsDip() const {return fNParamsDip;}
- Int_t GetNSegZDip() const {return fNZSegDip;}
- //
- //
- Float_t GetMinZSol() const {return fMinZSol;}
- Float_t GetMaxZSol() const {return fMaxZSol;}
- Float_t GetMaxRSol() const {return fMaxRSol;}
- //
- Float_t GetMinZDip() const {return fMinZDip;}
- Float_t GetMaxZDip() const {return fMaxZDip;}
- //
- Float_t GetMinZTPCInt() const {return fMinZTPCInt;}
- Float_t GetMaxZTPCInt() const {return fMaxZTPCInt;}
- Float_t GetMaxRTPCInt() const {return fMaxRTPCInt;}
- //
- AliCheb3D* GetParamSol(Int_t ipar) const {return (AliCheb3D*)fParamsSol->UncheckedAt(ipar);}
- AliCheb3D* GetParamTPCInt(Int_t ipar) const {return (AliCheb3D*)fParamsTPCInt->UncheckedAt(ipar);}
- AliCheb3D* GetParamDip(Int_t ipar) const {return (AliCheb3D*)fParamsDip->UncheckedAt(ipar);}
- //
- virtual void Print(Option_t * = "") const;
- //
- virtual void Field(const Float_t *xyz, Float_t *b) const;
- virtual void Field(const Double_t *xyz, Double_t *b) const;
- //
- virtual void FieldCyl(const Float_t *rphiz, Float_t *b) const;
- virtual void FieldCyl(const Double_t *rphiz, Double_t *b) const;
- //
+ AliMagFCheb(const char *name, const char *title, Int_t integ,
+ Float_t factor=1, Float_t fmax=15, Int_t map = k2kG,
+ Bool_t dipoleON = kTRUE,
+ const char* path="$(ALICE_ROOT)/data/maps/mfchebKGI_sym.root");
+ AliMagFCheb(const AliMagFCheb& maps);
+ AliMagFCheb& operator=(const AliMagFCheb& maps);
+ virtual ~AliMagFCheb();
+ //
+ virtual void Field(const Float_t *x, Float_t *b) const;
+ virtual void Field(const Double_t *x, Double_t *b) const;
virtual void GetTPCInt(const Float_t *xyz, Float_t *b) const;
virtual void GetTPCIntCyl(const Float_t *rphiz, Float_t *b) const;
//
- template <class T>
- Int_t FindDipSegment(const T *xyz) const;
- //
- template <class T>
- static void CylToCartCylB(const T *rphiz, const T *brphiz,T *bxyz);
- template <class T>
- static void CylToCartCartB(const T *xyz, const T *brphiz,T *bxyz);
- template <class T>
- static void CartToCylCartB(const T *xyz, const T *bxyz, T *brphiz);
- template <class T>
- static void CartToCylCylB(const T *rphiz, const T *bxyz, T *brphiz);
- template <class T>
- static void CartToCyl(const T *xyz, T *rphiz);
- template <class T>
- static void CylToCart(const T *rphiz,T *xyz);
- //
-#ifdef _INC_CREATION_ALICHEB3D_ // see AliCheb3D.h for explanation
- void LoadData(const char* inpfile);
- //
- AliMagFCheb(const char* inputFile);
- void SaveData(const char* outfile) const;
- Int_t SegmentDipDimension(Float_t** seg,const TObjArray* par,int npar, int dim,
- Float_t xmn,Float_t xmx,Float_t ymn,Float_t ymx,Float_t zmn,Float_t zmx);
- //
- void AddParamSol(const AliCheb3D* param);
- void AddParamTPCInt(const AliCheb3D* param);
- void AddParamDip(const AliCheb3D* param);
- void BuildTableDip();
- void BuildTableSol();
- void BuildTableTPCInt();
- void ResetTPCInt();
- //
- //
-#endif
- //
- protected:
- virtual void FieldCylSol(const Float_t *rphiz, Float_t *b) const;
- virtual void FieldCylSol(const Double_t *rphiz, Double_t *b) const;
+ AliMagWrapCheb* GetMeasuredMap() const {return fMeasuredMap;}
+ void SetMeasuredMap(AliMagWrapCheb* parm);
+ virtual Float_t SolenoidField() const {return -Factor()*fSolenoid;}
//
protected:
- //
- Int_t fNParamsSol; // Total number of parameterization pieces for Sol
- Int_t fNSegZSol; // Number of segments in Z for Solenoid field
- //
- Int_t fNParamsTPCInt; // Total number of parameterization pieces for TPC field integral
- Int_t fNSegZTPCInt; // Number of segments in Z for TPC field integral
- //
- Int_t fNParamsDip; // Total number of parameterization pieces for dipole
- Int_t fNZSegDip; // number of distinct Z segments in Dipole
- Int_t fNYSegDip; // number of distinct Y segments in Dipole
- Int_t fNXSegDip; // number of distinct X segments in Dipole
- //
- Float_t* fSegZSol; //[fNSegZSol] upper boundaries of Z segments
- Float_t* fSegRSol; //[fNParamsSol] upper boundaries of R segments
- //
- Float_t* fSegZTPCInt; //[fNSegZTPCInt] upper boundaries of Z segments
- Float_t* fSegRTPCInt; //[fNParamsTPCInt] upper boundaries of R segments
- //
- Float_t* fSegZDip; //[fNZSegDip] coordinates of distinct Z segments in Dipole
- Float_t* fSegYDip; //[fNYSegDip] coordinated of Y segments for each Zsegment in Dipole
- Float_t* fSegXDip; //[fNXSegDip] coordinated of X segments for each Ysegment in Dipole
- //
- Int_t* fNSegRSol; //[fNSegZSol] number of R segments for each Z segment
- Int_t* fSegZIdSol; //[fNSegZSol] Id of the first R segment of each Z segment in the fSegRSol...
- //
- Int_t* fNSegRTPCInt; //[fNSegZTPCInt] number of R segments for each Z segment
- Int_t* fSegZIdTPCInt; //[fNSegZTPCInt] Id of the first R segment of each Z segment in the fSegRTPCInt...
- //
- Int_t* fBegSegYDip; //[fNZSegDip] beginning of Y segments array for each Z segment
- Int_t* fNSegYDip; //[fNZSegDip] number of Y segments for each Z segment
- Int_t* fBegSegXDip; //[fNYSegDip] beginning of X segments array for each Y segment
- Int_t* fNSegXDip; //[fNYSegDip] number of X segments for each Y segment
- Int_t* fSegIDDip; //[fNXSegDip] ID of the dipole parameterization for given XYZ segment
- //
- Float_t fMinZSol; // Min Z of Sol parameterization (in CYL. coordinates)
- Float_t fMaxZSol; // Max Z of Sol parameterization (in CYL. coordinates)
- Float_t fMaxRSol; // Max R of Sol parameterization (in CYL. coordinates)
- //
- Float_t fMinZDip; // Min Z of Dipole parameterization
- Float_t fMaxZDip; // Max Z of Dipole parameterization
- //
- Float_t fMinZTPCInt; // Min Z of TPCInt parameterization (in CYL. coordinates)
- Float_t fMaxZTPCInt; // Max Z of TPCInt parameterization (in CYL. coordinates)
- Float_t fMaxRTPCInt; // Max R of TPCInt parameterization (in CYL. coordinates)
- //
- TObjArray* fParamsSol; // Parameterization pieces for Solenoid field
- TObjArray* fParamsDip; // Parameterization pieces for Dipole field
- TObjArray* fParamsTPCInt; // Parameterization pieces for Solenoid field integrals in TPC region
- //
- ClassDef(AliMagFCheb,3) // Wrapper class for the set of Chebishev parameterizations of Alice mag.field
- //
- };
-
-
-//__________________________________________________________________________________________
-inline void AliMagFCheb::FieldCyl(const Float_t *rphiz, Float_t *b) const
-{
- // compute field in Cylindircal coordinates
- // if (rphiz[2]<GetMinZSol() || rphiz[2]>GetMaxZSol() || rphiz[0]>GetMaxRSol()) {for (int i=3;i--;) b[i]=0; return;}
- FieldCylSol(rphiz,b);
-}
+ AliMagWrapCheb* fMeasuredMap; // Measured part of the field map
+ Float_t fSolenoid; // Solenoid field setting
+ //
+ ClassDef(AliMagFCheb, 2) // Class for all Alice MagField wrapper for measured data + Tosca parameterization
+};
-//__________________________________________________________________________________________
-inline void AliMagFCheb::FieldCyl(const Double_t *rphiz, Double_t *b) const
-{
- // compute field in Cylindircal coordinates
- // if (rphiz[2]<GetMinZSol() || rphiz[2]>GetMaxZSol() || rphiz[0]>GetMaxRSol()) {for (int i=3;i--;) b[i]=0; return;}
- FieldCylSol(rphiz,b);
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CylToCartCylB(const T *rphiz, const T *brphiz,T *bxyz)
-{
- // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
- T btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
- T psiPLUSphi = TMath::ATan2(brphiz[1],brphiz[0]) + rphiz[1];
- bxyz[0] = btr*TMath::Cos(psiPLUSphi);
- bxyz[1] = btr*TMath::Sin(psiPLUSphi);
- bxyz[2] = brphiz[2];
- //
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CylToCartCartB(const T *xyz, const T *brphiz, T *bxyz)
-{
- // convert field in cylindrical coordinates to cartesian system, point is in cart.system
- T btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
- T phiPLUSpsi = TMath::ATan2(xyz[1],xyz[0]) + TMath::ATan2(brphiz[1],brphiz[0]);
- bxyz[0] = btr*TMath::Cos(phiPLUSpsi);
- bxyz[1] = btr*TMath::Sin(phiPLUSpsi);
- bxyz[2] = brphiz[2];
- //
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CartToCylCartB(const T *xyz, const T *bxyz, T *brphiz)
-{
- // convert field in cylindrical coordinates to cartesian system, poin is in cart.system
- T btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
- T psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - TMath::ATan2(xyz[1],xyz[0]);
- //
- brphiz[0] = btr*TMath::Cos(psiMINphi);
- brphiz[1] = btr*TMath::Sin(psiMINphi);
- brphiz[2] = bxyz[2];
- //
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CartToCylCylB(const T *rphiz, const T *bxyz, T *brphiz)
-{
- // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
- T btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
- T psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - rphiz[1];
- brphiz[0] = btr*TMath::Cos(psiMINphi);
- brphiz[1] = btr*TMath::Sin(psiMINphi);
- brphiz[2] = bxyz[2];
- //
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CartToCyl(const T *xyz,T *rphiz)
-{
- rphiz[0] = TMath::Sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]);
- rphiz[1] = TMath::ATan2(xyz[1],xyz[0]);
- rphiz[2] = xyz[2];
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-inline void AliMagFCheb::CylToCart(const T *rphiz, T *xyz)
-{
- xyz[0] = rphiz[0]*TMath::Cos(rphiz[1]);
- xyz[1] = rphiz[0]*TMath::Sin(rphiz[1]);
- xyz[2] = rphiz[2];
-}
-
-//__________________________________________________________________________________________________
-template <class T>
-Int_t AliMagFCheb::FindDipSegment(const T *xyz) const
-{
- // find the segment containing point xyz. If it is outside find the closest segment
- int xid,yid,zid = TMath::BinarySearch(fNZSegDip,fSegZDip,(Float_t)xyz[2]); // find zsegment
- int ysegBeg = fBegSegYDip[zid];
- //
- for (yid=0;yid<fNSegYDip[zid];yid++) if (xyz[1]<fSegYDip[ysegBeg+yid]) break;
- if ( --yid < 0 ) yid = 0;
- yid += ysegBeg;
- //
- int xsegBeg = fBegSegXDip[yid];
- for (xid=0;xid<fNSegXDip[yid];xid++) if (xyz[0]<fSegXDip[xsegBeg+xid]) break;
- if ( --xid < 0) xid = 0;
- xid += xsegBeg;
- //
- return fSegIDDip[xid];
-}
-
#endif
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