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14 **************************************************************************/
18 //_________________________________________________________________________
19 // Class for the management by the CPV reconstruction.
21 //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001
23 // --- ROOT system ---
27 // --- Standard library ---
29 // --- AliRoot header files ---
31 #include "AliPHOSRecCpvManager.h"
32 #include "AliPHOSGeometry.h"
34 ClassImp(AliPHOSRecCpvManager)
36 //____________________________________________________________________________
37 AliPHOSRecCpvManager::AliPHOSRecCpvManager() :
39 fOneGamInitialStep(0.00005),
41 fOneGamStepMin(0.0005),
42 fOneGamNumOfIterations(50),
43 fTwoGamInitialStep(0.00005),
46 fTwoGamStepMin(0.00005),
47 fTwoGamNumOfIterations(50),
52 SetTitle("Cpv Reconstruction Manager");
55 AliPHOSRecCpvManager::~AliPHOSRecCpvManager(void)
60 Float_t AliPHOSRecCpvManager::Dispersion(Float_t etot, Float_t ai) const
62 //"Dispresion" of energy deposition in the cell.
63 // etot is the total shower energy, ai is the
64 // calculated cell response,
65 // ei is the measured cell response.
67 const Float_t kConst = 1.5;
68 return kConst*ai*(1.-ai/etot);
71 Float_t AliPHOSRecCpvManager::OneGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& Gi) const
73 //"Chi2" for one cell.
74 // etot is the total "shower" energy, ai is the
75 // calculated cell response,
76 // ei is the measured cell response.
78 const Float_t kConst = 1.5;
81 Float_t d = kConst*ai*(1.-ai/etot);
84 Gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
86 Info("OneGamChi2", " OneGamChi2 (ai,ei,etot,&Gi,chi2) %f %f %f %f %f", ai, ei, etot, Gi, da*da/d );
92 Float_t AliPHOSRecCpvManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& gi) const
96 const Float_t kConst = 1.5;
99 Float_t d = kConst*ai*(1.-ai/etot);
102 gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
108 void AliPHOSRecCpvManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi )
110 //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response.
111 //Integrated response (total "shower energy") is e,
112 //xi and yi are the distances along x and y from reference point
113 // to the pad center.
115 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
117 Float_t celZ = geom->GetPadSizeZ();
118 Float_t celY = geom->GetPadSizePhi();
120 // // Info("AG", "celZ: %f celY: %f", celZ, celY) ;
122 Float_t dx = celZ/2.;
123 Float_t dy = celY/2.;
125 // // Float_t x = xi*celZ;
126 // // Float_t y = yi*celZ;
133 Float_t a = Fcml(x+dx,y+dy) - Fcml(x+dx,y-dy) - Fcml(x-dx,y+dy) + Fcml(x-dx,y-dy);
137 Float_t gx = GradX(x+dx,y+dy) - GradX(x+dx,y-dy) - GradX(x-dx,y+dy) + GradX(x-dx,y-dy);
140 Float_t gy = GradY(x+dx,y+dy) - GradY(x+dx,y-dy) - GradY(x-dx,y+dy) + GradY(x-dx,y-dy);
145 Float_t AliPHOSRecCpvManager::Fcml(Float_t x, Float_t y)
147 //Cumulative function
149 const Float_t ka = 1.0;
150 const Float_t kb = 0.70;
152 Float_t fff = TMath::ATan(x*y/( kb*TMath::Sqrt( (kb*kb) + x*x+y*y)))
153 - TMath::ATan(x*y/(3*kb*TMath::Sqrt((3*kb)*(3*kb) + x*x+y*y)))
154 + TMath::ATan(x*y/(5*kb*TMath::Sqrt((5*kb)*(5*kb) + x*x+y*y)))
155 - TMath::ATan(x*y/(7*kb*TMath::Sqrt((7*kb)*(7*kb) + x*x+y*y)))
156 + TMath::ATan(x*y/(9*kb*TMath::Sqrt((9*kb)*(9*kb) + x*x+y*y)));
158 Float_t fcml = ka*fff/TMath::TwoPi();
159 // Info("Fcml", "fcml: %f", fcml) ;
165 Float_t AliPHOSRecCpvManager::GradX(Float_t x, Float_t y)
167 // Put a comment here
169 const Float_t ka = 1.0;
170 const Float_t kb = 0.70;
172 Float_t skv = kb*kb + x*x + y*y;
174 Float_t gradient = y*(1.-x*x/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
175 - y*(1.-x*x/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
176 + y*(1.-x*x/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
177 - y*(1.-x*x/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
178 + y*(1.-x*x/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
180 Float_t grad = ka*gradient/TMath::TwoPi();
185 Float_t AliPHOSRecCpvManager::GradY(Float_t x, Float_t y)
187 // Put a comment here
189 const Float_t ka = 1.0;
190 const Float_t kb = 0.70;
192 Float_t skv = kb*kb + x*x + y*y;
193 Float_t gradient = x*(1.-y*y/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
194 - x*(1.-y*y/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
195 + x*(1.-y*y/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
196 - x*(1.-y*y/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
197 + x*(1.-y*y/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
199 Float_t grad = ka*gradient/TMath::TwoPi();