| [a617744] | 1 | //
|
|---|
| 2 | #ifndef G__TRKUTIL_H
|
|---|
| 3 | #define G__TRKUTIL_H
|
|---|
| 4 | //
|
|---|
| 5 | #include <TVector3.h>
|
|---|
| 6 | #include <TVectorD.h>
|
|---|
| 7 | #include <TMatrixDSym.h>
|
|---|
| [82db145] | 8 | #include <TRandom.h>
|
|---|
| [a617744] | 9 | //
|
|---|
| 10 | //
|
|---|
| 11 | // Class test
|
|---|
| 12 |
|
|---|
| 13 | class TrkUtil {
|
|---|
| 14 | //
|
|---|
| 15 | //
|
|---|
| 16 | protected:
|
|---|
| 17 | Double_t fBz; // Solenoid magnetic field
|
|---|
| 18 | //
|
|---|
| [82db145] | 19 | Int_t fGasSel; // Gas selection: 0: He-Iso, 1: He, 2:Ar-Eth, 3: Ar
|
|---|
| 20 | Double_t fRmin; // Lower DCH radius
|
|---|
| 21 | Double_t fRmax; // Higher DCH radius
|
|---|
| 22 | Double_t fZmin; // Lower DCH z
|
|---|
| 23 | Double_t fZmax; // Higher DCH z
|
|---|
| 24 | //
|
|---|
| [a617744] | 25 | // Service routines
|
|---|
| 26 | //
|
|---|
| [65776c0] | 27 | void SetB(Double_t Bz) { fBz = Bz; }
|
|---|
| [a617744] | 28 | TVectorD XPtoPar(TVector3 x, TVector3 p, Double_t Q);
|
|---|
| 29 | TVector3 ParToP(TVectorD Par);
|
|---|
| 30 | //
|
|---|
| 31 | // Conversion to ACTS parametrization
|
|---|
| 32 | //
|
|---|
| 33 | TVectorD ParToACTS(TVectorD Par); // Parameter conversion
|
|---|
| 34 | TMatrixDSym CovToACTS(TVectorD Par, TMatrixDSym Cov); // Covariance conversion
|
|---|
| 35 | //
|
|---|
| 36 | // Conversion to ILC parametrization
|
|---|
| 37 | //
|
|---|
| 38 | TVectorD ParToILC(TVectorD Par); // Parameter conversion
|
|---|
| 39 | TMatrixDSym CovToILC(TMatrixDSym Cov); // Covariance conversion
|
|---|
| [82db145] | 40 | //
|
|---|
| [a617744] | 41 |
|
|---|
| 42 | public:
|
|---|
| 43 | //
|
|---|
| 44 | // Constructors
|
|---|
| 45 | TrkUtil();
|
|---|
| 46 | TrkUtil(Double_t Bz);
|
|---|
| 47 | // Destructor
|
|---|
| 48 | ~TrkUtil();
|
|---|
| 49 | //
|
|---|
| 50 | // Overload methods to allow call without instantiating class
|
|---|
| 51 | //
|
|---|
| 52 | static Double_t cSpeed()
|
|---|
| 53 | {
|
|---|
| [df408d2] | 54 | Double_t c = 2.99792458e8; // speed of light m/sec
|
|---|
| 55 | //return TMath::C()*1.0e-9; // Incompatible with root5
|
|---|
| [65776c0] | 56 | return c*1.0e-9; // Reduced speed of light
|
|---|
| [a617744] | 57 | }
|
|---|
| 58 | //
|
|---|
| 59 | // Service routines
|
|---|
| 60 | //
|
|---|
| 61 | static TVectorD XPtoPar(TVector3 x, TVector3 p, Double_t Q, Double_t Bz);
|
|---|
| [df408d2] | 62 | static TVector3 ParToX(TVectorD Par); // position of minimum distance from z axis
|
|---|
| 63 | static TVector3 ParToP(TVectorD Par, Double_t Bz); // Get Momentum from track parameters
|
|---|
| 64 | static Double_t ParToQ(TVectorD Par); // Get track charge
|
|---|
| [a617744] | 65 | //
|
|---|
| 66 | // Conversion from meters to mm
|
|---|
| 67 | //
|
|---|
| 68 | static TVectorD ParToMm(TVectorD Par); // Parameter conversion
|
|---|
| 69 | static TMatrixDSym CovToMm(TMatrixDSym Cov); // Covariance conversion
|
|---|
| [82db145] | 70 | //
|
|---|
| 71 | // Cluster counting in gas
|
|---|
| 72 | //
|
|---|
| [65776c0] | 73 | void SetBfield(Double_t Bz) { fBz = Bz; }
|
|---|
| 74 | // Define gas volume (units = meters)
|
|---|
| [82db145] | 75 | void SetDchBoundaries(Double_t Rmin, Double_t Rmax, Double_t Zmin, Double_t Zmax);
|
|---|
| 76 | // Gas mixture selection
|
|---|
| 77 | void SetGasMix(Int_t Opt);
|
|---|
| 78 | // Get number of ionization clusters
|
|---|
| 79 | Bool_t IonClusters(Double_t &Ncl, Double_t mass, TVectorD Par);
|
|---|
| 80 | Double_t Nclusters(Double_t bgam); // mean clusters/meter vs beta*gamma
|
|---|
| 81 | static Double_t Nclusters(Double_t bgam, Int_t Opt); // mean clusters/meter vs beta*gamma
|
|---|
| 82 | Double_t funcNcl(Double_t *xp, Double_t *par);
|
|---|
| 83 | Double_t TrkLen(TVectorD Par); // Track length inside chamber
|
|---|
| [a617744] | 84 | };
|
|---|
| 85 |
|
|---|
| 86 | #endif
|
|---|
